1999 Vol. 7, No. 4

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1999, 7(4): 1-4.
Abstract(903) PDF(983)
Abstract:
Theoretical basis of eco-agriculture construction in China
Li Quan-sheng
1999, 7(4): 1-4.
Abstract(1066) PDF(1024)
Abstract:
Relationship between the definition of agro-ecology and the connotation of China eco-agriculture in China is analyzed,the guiding significance of agro-ecology for the area classification,planning and designing,pattern building and evaluation index determining of eco-agriculture construction in China are expounded systematically.It shows that agro-ecology is the theoretical basis of eco-agriculture construction, and the practices in eco-agriculture construction will promote researches and developments of agro-ecology.
Natural resource valuation method for model design for sustainable develonment of agriculture
Zhang Ren-wu, Zhang Tong, Ji Wen-ying, Hu Mei, Zhou Lian-qi
1999, 7(4): 5-8.
Abstract(773) PDF(755)
Abstract:
Through evaluation the sustainability of natural resources expressed by theireconomic value,it is helpful to chang the free using natural resources to non-gratuitous system in order to sustain the productivity of the natural resources.Method and theory for evaluation the ecomonic-value of the natural resources were analysed in the paper,and date collected from a pilot field in Baiquan County was analysed and calculated by a method called Natural Resource Depreciation.The results proved the effectiveness of the method.
Accumulation patterns of grain protein and fat during reproductive development of soybean
Liu Xiao-bing, Wang Guang-hua, Jin Jian, Yang Shu-ping, Li Yan-hua
1999, 7(4): 5-8.
Abstract(1304) PDF(981)
Abstract:
Accumulation patterns of grain protein and fat during reproductive development of three soybean genotypes different in protein content were investigated.The results showed that the peak of relative content accumulation in fat appeared at 30 days after R5 stage in all cultivars (line),but with little difference in accumulation pattern,the lower protein cultivar(line) performed lower fat accumulation ability even at initial stage of accumulation,the pattern and peak of protein accumulation showed significant varietal differences, the accumulation patterns of absolute contents of protein and fat were similar in all cultivars used and the accumulations of absolute contents of protein and fat in higher protein cultivars were mainly influenced by the curve of single grain weight,however,lower protein line was influenced by relative content.
On the importance of rainwater utilization and agricultural water supply
Liu Chang-ming
1999, 7(4): 9-12.
Abstract(1331) PDF(1364)
Abstract:
Certain theory problems concerned with evaluation and utilization of water resources in China are discussed from the view of agricultural water supply.Rainwater utilization is probed into in combination of agriculture and rural water supply,and some suggestions are put forward for fully rainwater utilization.
Effects of the supply of citric acid and citric soluble phosphatic fertilizers on yield of wheat genotypes with high phosphorus efficiency
Wang Qing-ren, Li Ji-yun, Li Zhen-sheng
1999, 7(4): 9-13.
Abstract(1441) PDF(1107)
Abstract:
Under greenhouse condition, a pot experiment with citric acid, citric soluble and acid soluble phosphorus fertilizers applied to study the effects of various treatments on wheat growth and development was carried out. The results indicated that, among the treatments, citric acid accompanied with citric soluble phosphorus fertilizer could increase the yield most significantly, at the corresponding rates supplied, the average increase of P highly efficient genotype Lofflin was 94%, while that of low efficient 80-55 was 83.1%. Citric acid supplied alone could also increase the yields, for example, Lofflin had a increasing yield of 63.3%, 80-55 had that of 28.8%, showing a significant difference between highly efficient and low efficient genotypes. Little effect was found by application of rock phosphate alone or accompanied with citric acid. The main reason is the high pH value in calcareous soil in which the rock phosphate could not provide enough available phosphorus for crop growth.Furthermore, it showed that the acidification in the rhizosphere was limited by citric acid and the application of rock phosphate could also decrease the acidification through the dilution effect which resulted in a little effect of yield improvement for both of highly and low efficient genotypes.
A sudy on the relationships between the relative contents of needle volatile terpenes with environmetal and growth factors of Pinus tabulaeformis Carr
Liu He-ping, Zhang Yi-zao
1999, 7(4): 13-16.
Abstract(1657) PDF(881)
Abstract:
288 samples of mature Pinus tabulaeformis Carr.,which belong to 12 varieties and 36 stands and collected from four provinces:Shanxi,Hebei,Shaanxi and Gansu were analysed by GC,GC/MS technicals and regression methods.The results showed that:1)with the increasing of elevation,the total number of terpenes contained decreased,2)there were certain correlation between environmental factors and relative contents of some terpenes，3)there was no relationship existing between the relative contents of any single terpene with the tree height growth,but synthetical correlation might exist.
Effects of zinc deficiency on the growth and minerals metabolism of tomato and green pepper
Wang Jing-an, Zhang Fu-suo, Li Chun-jian
1999, 7(4): 14-16.
Abstract(1069) PDF(836)
Abstract:
Effects of Zn-deficiency nutrient solution on growth and development of tomato (Lycopersicon esculentum miller) and green pepper(Capsicum frutescens L.Var.grossum Bailey),and the concentration of P,K,Ca and Zn in organs of the two given plants was studied.The results showed that there was a close relationship between Zn-deficiency symptom on leaves and P,Ca concentration in the leaves.The symptom was independent on Zn concentration.Zn-deficiency disease resulted from over-accumulation of phosphorus and a great decrease of calcium in leaves,and from ion imbalance induced by reduction of K concentration. It indicated that Zn-deficiency in nutrient solution did not directly lead to decrease of Zn concentration in leaves.
Short-term rotation systems of winter forage mixtures with rice in low mountainous and hilly areas of subtropical zone of China
Zhou Shou-rong, Mao Kai, U. Simon, Pu Chao-long, Wang Guo-quan
1999, 7(4): 17-20.
Abstract(1293) PDF(935)
Abstract:
The experiments were carried out in Lushan county of Sichuan province during the period of 1991 to 1994.The results showed that the three kinds of rotation systems of mixtures of grasses and legumes with rice:Lolium multiflorum+Astragalus sinicus→rice,Loilum multiflorum+Medicago hispida→rice and Lolium multiflorum+Trifolium repens→rice,produced higher forage values and higher rice yield than the controlled plots.The utilization efficiency of cropland niche in those three rotation systems was increased through the improvement of soil structure and nutrition condition and the full utilization of symbiosis and mutual supplemental effects of winter grasses and lugumes.Thus the field gross productivity in the rotation systems were increased.
Comparison between the fertilizers efficiency and apparent efficiency of nitrogen of new-type N-fertilizers
Wang Jin-fang, Li De-ping, Li A-rong
1999, 7(4): 17-19.
Abstract(1194) PDF(780)
Abstract:
The experiments of new-type N-fertilizers were carried out in paddy field and upland field.Compared with common urea,after humic acid-urea,lignin-urea and coating-urea were applicated,the output of paddy rice and wheat were oboviously increased.The yield of rough rice was increased by 14%～16%，and the yield of wheat grain was increased by 4%～17%，the order of fertilizers efficiency was humic acid-urea≥lignin-urea＞coating-urea.Apparent efficiency of nitrogen was also increased by 7% in paddy rice and increased by 2.7%～17% in wheat.
Study on fertilizer placement style for zero tillage summer maize
Wang Xiu, Zhao Si-shen, Gao Qing-hai, Ma Da-min
1999, 7(4): 20-22.
Abstract(1601) PDF(1006)
Abstract:
The rational fertilization to summer maize under zero-tillage cultivation has been paid more and more attentions by farmers.Comparative experiments between no fertilization and five ways of fertilization under conditions of same fertilizer-rate and same management were conducted.Result showed that the unequivalent distance fertilization method was the best way for summer maize under zero-tillage.Under this condition,chlorophyll content was 3.94mg/g,leaf area was the largest and grain yield reached 7646.3kg/hm2,increased by35.23%.
A review of the ecological studies on symbiotic nitrogen fixation of actinmyces with nonlegumes
Wang Yuan-zheng
1999, 7(4): 21-25.
Abstract(1125) PDF(862)
Abstract:
More than 200 kinds of nonlegumes,known as symbiotic nitrogen fixation with actinmyces, were found to be simultaneously symbiosis with mycorrhizal fungi.Therefore,those nonlegumes have not only the high and long nitrogen fixation ability of legumes,but also the vigorous and rapid growth and strong stress resistance characters,and can be used as pioneer plants to improve adverse ecological environment.Great benefits will be achieved from the research and utilization of those nonlegumes and actinmyces.
Effects of irrigation system on the water consumption and the yield of winter wheat
Li Jian-min, Wang Pu, Zhou Dian-xi, Lan Lin-wang
1999, 7(4): 23-26.
Abstract(1523) PDF(1049)
Abstract:
The field experiments were carried out at Wuqiao Experiment Station of China Agricultural University from 1993 to 1994.Eleven irrigation systems were made up by five irrigated rates at winter wheat growth period from non-irrigation (0 mm) to four-time irrigation(4×75 mm),and by five irrigated times from upstanding stage to grain-filling stage,their water consumpation and yield formation were studied.The results showed that the total water consumpation increased,and soil storage water consumption decreased in proportion to the increment of irrigated water;and the proportion consumed after flowering stage increased as the total water consumption increased.The yield and their components changed significantly under different irrigation systems. It showed that irrigation at upstanding stage increased ear number,at jointing stage increased grain number,and at booting stage or flowering stage increased grain weight.Irrigation once at booting stage was the best.Two-times of irrigation should be given at jointing stage and flowering stage,and three times of irrigation should be given at jointing stage,flowering stage and grain-filling stage.It was very useful for higher yield and water use efficiency by limiting the water consumption before flowering stage and increasing the consumption after flowering stage.
Effects of alternate strip planting millet and soybean on the physiological processes of foxtail millet
Gu Shi-lu, Guo Zhi-li
1999, 7(4): 26-30.
Abstract(784) PDF(772)
Abstract:
By alternate strip planting millet with soybean,the microclimate in the field such as the air temperature,luminosity and CO2 density is improved which promote the growth and physiological reaction of the foxtail millet.The results are that:leaves area of the millet are increased, stomatal resistance decreased, photosynthesis,transpiration and respiration are all improved,dry matter accumulated is increased and matter transformed to spike is quickened,the harvest index and water and light utilization efficiency are increased,higher yield and higher benefits are achieved.
Effect of root barrier on soil moisture in poplar-crop intercropping system
Wang Ying, Yuan Yu-xin, Pei Bao-hua, Wang De-yi
1999, 7(4): 27-29.
Abstract(1336) PDF(978)
Abstract:
After the study on the effect of root barrier on soil moisture in poplar-crop intercropping system,it was found that the root barrier could availably improve soil water condition,soil water in crop root was increased by 15.8%～17.7%,and siol water consumption in one day after irrigation was decreased by 0.5%.
Study on the improvement of water use efficiency in foxtail millet
Gu Shi-lu, Ma Jian-ping, Guo Zhi-li, Du Jun-e, Liu Zi-jian
1999, 7(4): 30-33.
Abstract(678) PDF(759)
Abstract:
The results of experiments with different varieties,seeding dates,fertilizer application,plastic film mulching,plant growth regulators and comprehensive cultivative technique systems showed that genotype of varieties,seeding dates,plant growth regulators and plastic film mulching had higher effect on the water use efficiency(WUE) of millet.To improve WUE of millet is a comprehensive cultivation technique including selection of super-variety with high WUE,proper seeding,rational fertilization and application of plant growth regulators.The tests showed that WUE of millet was increased by 26.5% to 36.9% by measurement of reducing unfruitful seeds and increasing plump seeds.WUE was increased by 33.3% to 49.3% under alternate strip cropping system.
A preliminary study on the technology for storage of tissue-cultured plantlets in low temperature condition
Bai Shu-xia, Liu Li-qiu, Chen Wen-long
1999, 7(4): 31-34.
Abstract(1075) PDF(939)
Abstract:
After stored in natural low temperature(0～10℃)，forest tree tissue-cultured plantlets had a higher survival rate, their chilling resistant ability was increased visibly. The results from observing and analysing the morphological and physiological characters of the platlets at different storage period showed that with the decreasing of storage temperature,starch content was decreased, while the soluble sugar content increased,crude protein content was increased slightly with fluctuation,which are the physiological reactions that the tissue-cultured plantlets adapted to low temperature and weak light.The losing rates after storage for the 165 days differented plantlets and 120 days rooted plantlets were all lower than 10.0%.After the storage the effective number of the differented plantlets was greatly increased with more than 95.5% rooting rate and the transplanting survival rate of the rooted plantlet reached 93.5%～98.5%.
Allelopathy and sustainable agriculture
Shen Jian-bo, Zhang Fu-suo, Wang Jing-guo, Mao Da-ru
1999, 7(4): 34-37.
Abstract(1187) PDF(1170)
Abstract:
The properties of allelopathy and sustainable agriculture were discussed.The types of allelochemicals and their action mechanisms in agricultural ecosystem were summarized.The relationship between allelopathy and sustainable agriculture was analyzed.The impact of allelopathy on nutrient resource management and other agronomy methods was also discussed.The methods and the paths to develop sustainable agriculture were put forward by optimizing farming measure and rationally utilizing allelopathy between plants.The research emphasis of allelopathy was pointed out.
The beneficial results of natural light greenhouse on temperature in the heartland of Takelamagan Desert
Li Tao, Wu Zu-rong, Gao Qian-zhao
1999, 7(4): 38-42.
Abstract(1049) PDF(978)
Abstract:
Air temperature in the greenhouse without heating in heartland of the Takelamagan Desert is more than 14℃ higher than outdoor air temperature, and soil surface temperature is more than 15℃ higher. Then vegetable varieties with high cold resistance can normally grow in the greenhouse. In addition,reed straw screen can increase air temperature about 0.9℃ and small plastic tunnel can add another 3.9℃ temperature to the greenhouse. Therefore most vegetables can be cultivated in the greenhouse when small plastic tunnel and screen are used.When greenhouse is heated,the temperature difference between greenhouse and outdoor could reach 30℃,then the thermophilic vegetables such as tomato, cucumber and pepper can grow very well. Air temperature in the greenhouse can be raised by 3.5℃/h by direct sunshine,and temperature does't fall quickly under cloudy conditions. Ventilation can reduce the air temperature increasing by 0.33 to 2.44℃/h·m2,and increase the air temperature falling by 3.7℃/h·m2.The distribution of temperature in the greenhouse is variable with both ends' temperature are higher than that in the central section, the north side higher than the south side. If the distance between two stoves is at 25m,the temperature in the greenhouse will be keeped in homogeneity.
Impacts of typhoon storm on farmland ecological environments in the eastern coastal area of Zhejiang Province and their countermeasures
Ye Xu-jun, Wang Zhao-qian, Wang Cheng-hong, Qian Yi-fei
1999, 7(4): 38-40.
Abstract(1509) PDF(865)
Abstract:
The impacts of the typhoon storm incurred by No.11 typhoon in 1997 on the farmland ecological environments in the eastern coastal area of Zhejiang Province were studied.The results indicate that the salt content of the soils as well as the irrigated water within the agroecological systems immersed by sea water increases by a big margin.Particularly,the salt content of surface soils immersed for 72 hours and more than 72 hours reached 1.27% and 1.38% respectively,and those of irrigated water on surface layer,and at the depths of 3m,6m,and 10m beneath surface after flooding for 8 days reached 2.36‰,3.22‰,3.84‰ and 4.03‰ respectively.Even after the flooding receded,the salt content of irrigated water still stands around 2.26‰.Therefore,both the flooded soils and irrigated water are no longer applicable to agricultural uses if no improvement measures are undertaken.To reduce the impacts of the typhoon storm and resume the normal agricultrual production,the remedial countermeasures,such as removing dried crop stems,deep digging and tillage,proper structure of crop varieties and suitable cultivation and management measures,are proposed for rehabilitating the impacted agroecological environments.
Investigation on nitrate pollution in ground water at intensive agricultural region in Huanghe-huaihe-haihe Plain
Gao Wang-sheng, Huang Jin-yong, Wu Da-fu, Li Xin-ping
1999, 7(4): 41-43.
Abstract(2211) PDF(1250)
Abstract:
Results obtained from investigation at intensive agricultural region in Huanghe-Huaihe-Haihe Plain demonstrate that nitrate pollution of ground water is serious in high-yield agricultural region and in high-yield farmland.Nitric nitrogen content in ground water is higher in vegetable-land than in grain land.Nitrate content in ground water accumulates obviously with the increase of N-fertilizer applied,so the potential pollution should not be ignored.Nitric nitrogen content in ground water has positive relation with the amount of N-fertilizer applied.
The unstable factors in the sandy land agricultural development in Yucheng and countermeasures
Gao Qian-zhao, Zhang Xiao-you
1999, 7(4): 43-48.
Abstract(1604) PDF(900)
Abstract:
Factors of water and climatic fluctuation as well as the secondary salinization problems existing in the sandy land development in Yucheng were analysed and studied. The results showed that if suitable measures applied and stable sandy land agricultural ecological system established, the harm cursed by the unstable factors to the new cultivated land can be reduced or prohibited, and the sustainable agricultural development can be achived.
Pollution situation of high mineralized waste water in oil field on farmland
Xiang Ya-ling, Li Feng, Shao Zhi-hui, Wu Kong-qing, Ding Heng-hu
1999, 7(4): 44-47.
Abstract(1435) PDF(1100)
Abstract:
In Jianghan oil field,the soil around the oil well has been polluted by high mineralized waste water which comes from drilling well and extracting oil and caused the decrease of the crop yield.The results from the investigation on pollution status of dry land and paddy with different polluted degrees in Qianjiang County show that the main pollutants are chloride and salt as well as cadmium and oils.In the ploughed layer of paddy,chloride and salt content of the top are higher than those of the bottom,which is on the contrary in dry land.All polluted soil fertility was decreased.
The comprehensive assessment method on the ecological environment in the coal mining areas
Wei Chao-yang
1999, 7(4): 48-50.
Abstract(811) PDF(759)
Abstract:
Based on the analyses of eco-environmental destructive mechanism in coal mining area,the conception and its calculation formula of ecological destructive index were put forward.According to the calculating results of ecological destructive index on 57 coal mining areas in China,destructed extents of eco-environment are classified and appraised.
Analysis of the output to input ratio in farmland ecosystem in Shouguang Experimental Area,the prevention and cure of seawater intrusion project in Laizhou Bay
Luo Hong-yi
1999, 7(4): 49-53.
Abstract(1140) PDF(1080)
Abstract:
Energy and material flux in Lijia village farmland ecosystem were analysed and evaluated.The results showed that the Lijia village,which used to be affected by seawater intrusion,after harnessed by agro-eco-engineering,its system function has been strenthened up,and its structure tends to reach rationalization.Then some problems which should be paid attention to are pointed out concerning eco-agricultural development in the region.
Indicators of sustainable and efficient utilization of agricultural resources in red and yellow soil region of China
Hou Xiang-yang
1999, 7(4): 51-54.
Abstract(956) PDF(831)
Abstract:
Indicators of sustainable and efficient utilization of agricultural resources in red and yellow soil region in China were established,based on the analysis on the relationship between sustainability and high efficient use of regional agricultural resources.Using the indicator system,22 typical counties in the region in which agricultural productivity is moderate and low are appraised.The results indicate that it is important to coordinate sustainability and high efficient use of agricultural resources in the region.
Consequences and strategies about the excessive grazing to public grassland in Bashang
Dong Quan-hai, Li Qing-hai, Jia Ju-quan
1999, 7(4): 54-56.
Abstract(1184) PDF(954)
Abstract:
The serious consequences of excessive grazing existing in the public grassland in Bashang region is discussed,the reseasons why this problem hasn't been solved for years are analysed,and effective strategies for solving this urgent problem in future are put forward in the paper.
Study on the measurement method of technology progress rate in eco-agriculture
Zhao Yue-long, Wang Ge-hua, Wang Hai, Fang Fang, Shi De-ming
1999, 7(4): 55-57.
Abstract(1457) PDF(1115)
Abstract:
After studying the measurement method concerning the rate of technology progress, a set of measurement methods of technology progress rate in eco-agriculture was put forward according to the feature of eco-agriculture.
SDLP method on optimization of regional agricultural resource allocation
Lu Fu-bao
1999, 7(4): 57-60.
Abstract(1093) PDF(836)
Abstract:
Different mathematical models for resouce allocation are summed up in the paper with the characteristics of linear programming model(LP) and system dynamics model(SD) analysed in detail.Based on comparing both SD and SP,a new SDLP method of resource allocation is provided.It has been shown by its application that the SDLP is feasible and effective.
On forest ecosystem management
Hou Yuan-kai, Li Hong-xun, Liu Jia-ling, Zhang Cai-qiao
1999, 7(4): 58-60.
Abstract(1283) PDF(1040)
Abstract:
All essential factors in forest ecosystem are connected and acted mutually in order to maintain circulation and change of substance and energy and to keep equilibrium between input and output of substance and energy in forest ecosystem.From this principle,the forest ecosystem characteristics of public welfare forest and commodity forest and natural reserve of bio-diversity are described,thereby,the thought of forest ecosystem management is put forward.
The "Six-Three Systems Engineering Project" in eco-agricultural development in Hetao Plain in lnner Mongolia
Wang Wen-sheng, Wang Zhi
1999, 7(4): 61-64.
Abstract(698) PDF(740)
Abstract:
In viewing the three restricting factors: soil salinization,sandy erosion and deterioration of land productivity to the development of eco-agriculture in Hetao Plain,the "Six-Three Systems Engineering",an macro-controlling model and policy for operation and management of ecological agricultural construction in the plain,are designed and complied,which is a comprehensive achievement in the research of natural and social sciences.
To implement the natural forest protection project in Hebei Province
Zhang Guo-sheng, Bai Yong-fu
1999, 7(4): 61-63.
Abstract(1176) PDF(801)
Abstract:
Although the forest resources in Hebei Province are deficient and the proportion of the natural forests is small,the forests in Hebei Province play an important role in improving and protecting the ecological environment and constructing national economy in Jing-Jin(Beijing and Tianjin)region since Hebei Province surrounds Beijing and Tianjin and occupies a strategic geographical position.The present situations of the natural forest,the eco-environment and its special geographical positioin in Hebei Province as well as importance of the starting-up and implementing natural forest protection project were expounded,and basic strategy of implementing natural forest protection project in Hebei Province was put forward.
Robinia pseudoacacia L-An excellent species for afforesting the limestone hills in north Guangdong Province
Chen Zhao-ping, Peng Jian-zong, Pan Guo-xing, Mo Xi-mu
1999, 7(4): 64-66.
Abstract(1373) PDF(1020)
Abstract:
Robinia pseudoacacia L is a plant which is distributed in Temperate Zone.It had been planted widely in central and north China.In 1991,we first introduced this plant into Guangdong Province on a large scale and planted for afforesting the limestone hills in north Guangdong Province.The results showed that this plant could grow well in the limestone hills in north Guangdong.This species could adapt to arid and thin soil of limestone hill.Its roots were plump and juicy.It has nodules that can fix nitrogen.Robinia pseudoacacia L gained high growth speed when it had been planted in limestone hill for three years.Six years old tree could reach 4～7 meters high.The forest of Robinia pseudoacacia L could obviously improve the environment in limestone hills through preventing soil erosion,increasing the capacity of soil to reserve water,lowering soil and air temperature,increasing air humidity especially in hot and dry season.
Ways for sustainable agricultural development in sub-tropical hilly regions--A case study from Tuojia eco-agricultural construction
Liu Fang-qing
1999, 7(4): 65-68.
Abstract(1049) PDF(783)
Abstract:
Tuojia is a typical sub-tropical hilly region in terms of its Iandscope and climate.Its social,economic and ecological environments is similar to that of other relevant regions. In the practice of eco-agricultral construction, which involves plan-guiding, systems coordination development and new technologies,agricultural and rural economy,had achieved great progresses in the past eight years.Now Tuojia is on the track of sustainable and stable development.In the research,four points from Tuojia's experiences in eco-agricultural construction were drawn for extension in other relevant regions.
Eco-engineering of integration of crop-livestock and its planting model
Xing Ting-xian
1999, 7(4): 67-70.
Abstract(711) PDF(673)
Abstract:
Eco-engineering of integration of crop-livestock is a complex engineering of agro-ecological,economical and technological system.It is composed of three sub-systems including plant (crop industry),animal(livestock industry)and microbe(linking crop and livestock industry),in which the crux of matter is to set up an effective and saving grain animal production eco-engineering system called “4,3,2,1”animal production model.The main planting models of integration of crop-livestock was found such as“one crop and one feed”,“one crop and one economy plant”,“two feeds and one crop”and“one crop one economy plant one feed”.The core of planting models of integration of crop-livestock is setting up acoordinated“crop-economy-feed”planting model with crop production as base,feed production as focal point,economy plant production as power.The suggesting proportion of the three plants is 5∶2∶3.
1999, 7(4): 69-71.
Abstract(686) PDF(674)
Abstract:
Eco-agricultural pattern of water and soil conservation and its supporting project construction in Cili County of Hunan Province
Li jing-bao, Xie Bing-geng, Zhu Fu-yuan
1999, 7(4): 71-73.
Abstract(1325) PDF(831)
Abstract:
Using the ecological principle and the system engineering method,eco-agricultural pattern of agriculture-forestry-animal busbandry and its supporting projects techniques were implemented.It included mountain,water,forest,farmland and road harnessing,rural energy source project,courtyard ecoeconomic project,farmland development project,animal busbandry project,farming-forestry project and so on.The harmonizing developments of economy-ecology-society are realized. 
1999, 7(4): 72-75.
Abstract(952) PDF(872)
Abstract:
Stereo planting patterns and supporting cultivation techniques in Quanjiao County of Anhui Province
Sun Wen-ping, Wang Wan-gui, Zhang Qing-song
1999, 7(4): 74-77.
Abstract(1202) PDF(1022)
Abstract:
Based on the natural resources and the economic condition of Quanjiao County,the stereo planting patterns and its supporting cultivation techniques including “rape-water melon-rice”,“water melon-cotton-winter vegetable”,“vegetable-rice-vegetable”,“winter vegetable-cotton-vegetable”,“wheat-water melon-soybean”, “potato-water melon-cotton”,“water melon-corn-rice”etc.are implemented.In 1997,the compound interplanting areas achieved 13300hm2 in the county and 5600hm2 of them was 7500kg/hm2 grain output,increasing 12.4% over traditional planting and 30000yuan/hm2 output value,increasing 24% over traditional planting.
Agriculture in city countryside and its environment protection
Li Guo-xue, Wang Yan-tian
1999, 7(4): 78-81.
Abstract(1605) PDF(1004)
Abstract:
The conception and category of agriculture in city countryside was discussed.The characteristics of developing of agriculture in city countryside,types of waste, main environmental problems and approaches of waste reuse as well as importance in Beijing are expounded.The developing aspects and policies of agriculture in city countryside are explored,and subarea development program of agriculture in city countryside in Beijing was put forward.

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