中国生态农业学报(中英文)

1995, 3(1): 1-4.

Abstract(1040) PDF(829)

Abstract:

1995, 3(1): 5-7.

Abstract(889) PDF(1173)

Abstract:

Ecological Problems in Forestry and Strategies for its Development in China

Tao Siming

1995, 3(1): 8-12.

Abstract(1190) PDF(861)

Abstract:
The development of forestry and increasing the percentage of forest cover are very important to the purpose of coordinately developing environment and economy.Then great attention should be paid to forest eco-environment which was given a detailed analysis in this paper.Some releveant strategies for improvement of the forest ecology were also presented here.

On Solving Rural Domestic Energy Source Problems in China

Wang Zhengzhou

1995, 3(1): 13-17.

Abstract(928) PDF(907)

Abstract:
From the viewpoint of eco-agriculture,problems in rural domestic energy source and ways for solving were discussed in this paper.Shortage of domestic energy in rural area is the primary reason which causes tha deterioration of the ecoenvironment in countryside,then developing fuelwood forest can provide energy source for villages and developing biogas provides a way to reduce rural domestic energy consumption in China.

Geometrical Characteristics of Crop Colony in Northwest Shandong Plain

Dong Zenguo, Liu Ruiwen

1995, 3(1): 18-22.

Abstract(962) PDF(882)

Abstract:
The geometrical characteristics of crop colony are described by leaf inclination and position angles.The leaf inclination angle is mainly affected by genetic characters of the crop,the planting design has little influence on it.Leaf area index is larger for the variety with larger inclination angle,and smaller for the variety with smaller inclination angle.The leaf azimuth to a great extent is decided by the planting design.

Middle Route South to North Water Transfer and Sustainable Agricultural Development in North China Plain

You Maozheng, Yu Xiaoliang, Wang Huixiao

1995, 3(1): 23-27.

Abstract(1037) PDF(995)

Abstract:
In this paper it is pointed out that construction the great water transfer project from south to north along the planned middle route and application water-saving agriculture are two strategies for solving the serious water shortage problem in North China Plain.The middle route of long distant water transfer from Changjiang River Basin will supply water to North China Plain that will promote the development of new industry and sustainable development of agriculture and economy in this area.

On Variation of the Distribution and Forms of Cu,Zn,Ni,and Mn in Soil Profile

Ding Weixin

1995, 3(1): 28-33.

Abstract(945) PDF(1002)

Abstract:
Variations of the forms of Cu,Zn,Ni and Mn in calcic concretion black soil profile and farming practices on its effects were studied by using a seven-step sequential extraction procedure.The results showed that relative amounts of exchangeble,organic bound and amorphous iron oxide bound Cu,Zn,Ni and Mu decreased and of manganese oxide bound and residual Cu,Zn,Ni and Mu increased with the deepenning of the soil profile.The distribution of relative amounts of carbonate bound Zn,Cu,Ni and Nu in the soil profile was not consistent,some increased and some decreased with the deepenning of the soil profile,and were also affected by farming practices.Crystalline iron oxide bound Cu,Zn,Ni and Mu could be divided into two types,relative amounts of Cu and Ni were comparative stable,however the Zn and Mu were remarkably changeable.Cultivation and rotation of rice and upland farming enable the less available fractions of those microelements transformed into more available fractions to crops.

Impacts of Appling Zinc with Different Methods on Zinc Content and Yield of Wheat

Zhou Wei

1995, 3(1): 34-38.

Abstract(1212) PDF(1021)

Abstract:
Zinc is an element and activator contained in varied enzymes in plants.Zinc-deficiency greatly affects the growth of crops and health of humanbeing.To apply zinc with different methods to zinc-deficit soils has been popularized,but the opinions vary greatly on which method is the best.In China there are many cultivated land being short of zinc,so it is highly important to study the methods and results of appling zinc to soil.Experiments of appling zinc by different methods to zinc insufficient soils were conducted.It was shown that the simple method of appling zinc to soil had the best results based on analysis of the contents of chlorophyll,nitrogen and zinc,biomass,contents of 17 kinds of amino acids as well as the output of wheat.And the cost of this simple method was also very low.

Population Dynamics of Citrus Rhizosphere Microorganisms and Rhizosphere Effect

Zuo Huaqing, Wang Zishun

1995, 3(1): 39-47.

Abstract(1140) PDF(1069)

Abstract:
The primary composition of citrus rhizosphere microorganisms is bacteria,whose number reaches up to 76871×10⁷ per gram dry soil,nest is fungi with 17549 numbers per gram dry soil,the least is actinomyces,the number is 12462 per gram dry soil.Those quantity are 67.6,12.4 and 26.9 times higher than those in no-root soils in the citrus field,respectively. The rhizosphere effect is very remarkable.Rhizosphere bacteria tends to be more abundant in Citrus ushiu mare soil.Quantity of those rhizosphere microorganisms are influenced by soil physical and chemical characters and changing with citrus variety stock as well as season. There are also close relation between disease enduring and susceptibility of citrus root and root stem to some diseases with the quantity,type and distribution of beneficial and harmful rhizosphere microorganisms.

Comprehensive Benefits of the Compound Agricultural and Forest Ecosystem in Raoyang Experimental Area in Huang-Huai-Hai Plan

Liu Yamin, Zhang Junying, Wu Bingqi

1995, 3(1): 48-52.

Abstract(1055) PDF(791)

Abstract:
Raoyang Experimental Area in Huang-Huai-Hai Plain,Which used to be a low production area,is under one of the national key scientific and technological projects,now it is changed into a area with good eco-environment,high production and high forest coverage by comprehensive management.The construction of the compound agricultural and forest ecosystem changed the local ecological condition,meteorological factors,content of CO₂,dust content in air and bird numbers.Forest coverage was increased from 2% to 20%,crop yield was increased from 1.5t/ha to 7.5/ha.Remarkable ecological and economic benefits have been achieved.

The Influencing Factors to Dry Land Rice Production in Salinized and Easily Waterlogged Lowland--A case study from Qiwanmu of Nanpi County,Hebei Province

Sun Jialing, Ma Yongqing, Zhao Changsheng, Chen Hongen, Shinobu Inanaga, Kazuyoshi Takeda

1995, 3(1): 53-57.

Abstract(1248) PDF(997)

Abstract:
In this paper the influencing factors to dry land rice production growing on salinized and easily waterlogged lowsand was analysed by using analysis of variance and path analysis under the rice yield varied from 0.36t/ha to 6.35t/ha.The results showed that the primary factor affecting dry land rice production is the plant density.Therefore,the culturing techniques,which couldincrease the rice seedling establishment and guarantee high seed germination,are the most important measures for high production of the rice.The second factor is the 1000 seed weight.Then the techniques which could increase the seed weight should also been paid attention to.The third factor affecting the rice yield is the unmber of glumes per ear.The varieties with long and large head are not suitable to such condition as the results showing,on the other hand attention should be paid to earlier maturity varieties for high yield of rice in this area.

Structure Models and Economic Benefits of Representative Ecological Households

Qiu Ling

1995, 3(1): 58-62.

Abstract(1346) PDF(1012)

Abstract:
Current situations and characters of ecological households,the basic unit of ecoagriculture,were summaried and analysed in Shannxi Province.The production structure model were studied based on regional ecology,industrial structure and administrative style.Economic,social and ecological benefits of developing ecoagriculture and courtyard economy of the ecological households were presented.

Preserving and Utilizing Natural Enemy for Ecoagricultural Development--Integrated Control of Cotton bollworm by Conservation and Encouragement of Natural Enemies

Nan Liuzhu

1995, 3(1): 63-66.

Abstract(996) PDF(916)

Abstract:
Since 1980s the food condition and inhabitation environment of cotton bollworm have been changed by the changing of cultivation system of crops.The main reason for the outbreak of cotton bollworm in the Yellow River Basin was the the destroy of ecological balance.Natural enemy,the same as water,soil,light,air,and heat,is part of agro-natural resources.Then is was suggested that the conservation and encouragement of natural enemies be included in the major projects of ecoagricultural developing strategies.The studies of key control techniques and basic theory should be strengthened up.

Genetic Analysis of Yield Components of Different Types of Foxtail Millet

Ji Guisu

1995, 3(1): 67-71.

Abstract(1061) PDF(811)

Abstract:
Based on the investigation results on 9 agronomic characters of 12 cultivars,which belong to three types of Foxtail millet,heredity of agronomic characters and their genetic inter-relations with ear grain weight were studied in this paper.It showed that there was distinct difference among the three types of millet crpos.Further analysis and comparasion of the difference were presented to provide scientific basis for millet breeding.

Yield and Economic Benefit of Corn Ground Covered with Plastic Film in Zhangye City,Gansu Province

Xu Cuncai

1995, 3(1): 72-75.

Abstract(1039) PDF(1018)

Abstract:
Effects of density and nitrogen and phosphate fertilizers on yield and economic benefit of corn ground covered by plastic film and the interrelations of the three factors were studied by revolving regression designed field experiment.Based on the experimental data a regressive yield and economic model were established.Then based on analysis of the model suitable rate of dressing of the two fertilizer at current condition can be determined.It was also concluded that for increasing the corn yield and economic benefit nitrogenous fertilizer is more important than density,and density is more important than phosphate fertilizer.

Evaporation and Transpiration in Farmland

Zhang Li

1995, 3(1): 76-78.

Abstract(899) PDF(977)

Abstract:
Evaporation and transpiration rate in farmland were measured separately for cotton and winter wheat under real field condition.The results show that the two methods used in the experiment were reliable.

1995, 3(1): 79-80.

Abstract(854) PDF(1100)

Abstract:

1995 Vol. 3, No. 1