1997 Vol. 5, No. 3

  Previous Issue | Next Issue 
Display Method:
On the design of chinese ecological agriculture model
Zhang Renwu, Ji Wenying, Xu Jing
1997, 5(3): 1-5.
Abstract(2118) PDF(1203)
Abstract:
Based on the systematic analysis of agriculture ecosystem and the intension of the chinese ecological agriculture ,both in theory and practice,this paper discusses the basic concept,systematic nomenclature of the chinese ecological agriculture model and the method of design of the ecological agriculture model.
A study the physio-eeology of dryland crop population
Shangguan Zhouping
1997, 5(3): 6-9.
Abstract(1125) PDF(820)
Abstract:
Based on the experiments and production practices of dryland wheat in Loess Plateau，research methods about the pbysio-ecology of crop population，root physio-ecology，the capacity of crop population autoregulation，dynamics of leaf area and canopy photosyn-thesis，etc．are discussd in this paper．
Characters of untrient cycles and ways for regulating their balance in south Jiangsu Province
Chen Xin, Li Pingping, Zhang Xigu
1997, 5(3): 10-14.
Abstract(995) PDF(919)
Abstract:
The dynamics of farmland untrient cycles and balance in the southern part of Jiangsu Province were analysed based on macro-calculation and field tests. The results show that the main nutrient input is changing from organic fertilizer to inorganic fertilizer;farmland internal cycling is being weakened;Nbalance is changing from deficiency to surplus,P from deficiency to equilibrium, while K is becoming more and more deficient. So dnhancing P and K input and limiting N input as well as increasing the return of organic matter to farmland by mechanization are important ways to regulate farmland nutrient balance in this region.
A preliminary report on the ecological performance of Desmodium heterocarpum DC vat．strigosum Van Meeuwen
Chen Zhaoping, Peng Jianzong, Cheng Shuangqi, Mo Ximu
1997, 5(3): 15-18.
Abstract(1064) PDF(781)
Abstract:
Desmodium heterovarpum DC var．strigosum Van Meeuwen is a perennial herb which is rare in Yunan County，Guangdong Province．It has high adaptability to sunshine which enables it to grow very well under shady conditions．Even in winter its leaves have relative high contents of chlorophyl1 and can sustain certain net photosynthetic rate．It also has an extensive root systems and dense canopy and its root bears some nodules which can fix atmosphere nitrogen．Those characters enable it to compete with weeds．It has multi-ecoloical functions．Then this herb has high application value in the utilization of local bloresources．
Effects of the main ecological factors on gallnut yield
Qiu Mingsheng, Zhao zhimo, Xu Xueqin, Gou Yang
1997, 5(3): 19-23.
Abstract(1282) PDF(917)
Abstract:
Tree，moss and aphid are three necessary factors to produce gallnut．The composition of their different quantities directly affects the gallnut yield．By using orthogonal combination design，an experiment was carried out to study the effects of sumac，winter host mosses and spring migrant on yield of gallnut．The results showed that gallnut yield is linearly intluenced by the numbers of sumac(Rhus chinensis Mil1．)，area of winter host mosses(Plagiomnium maximoioziiT．Kop)and quantity of spring migrant(Schlechtendalia chinensis )separatly as well as their different combinations．The amount of spring migrant has the largest effect on gallnut yield,followed by the number of sumac and area of winter host mosses．The results may be useful for cultivation of gallnut.
Variation of sugars in different parts of birch in spring by gas-chromatography
Xu Guoying, Xie Ming1ing, Wang Yunfang, Sun Yi
1997, 5(3): 24-27.
Abstract(943) PDF(850)
Abstract:
Results from analysing the contents of mono-and oligo-saccharides(total 14 compounds) in different parts of birch(Betula pendula Roth)in spring by gas-chromatography indicated that the major sugars in birch sap were mono-saccharides in which fructose content was about 9．04mg／ml and gluctose content about 4．80mg／ml(measured on April 4),and there were also some trace of disaccharlde and trisaccharide observed．The major sugars in branch and in root were also mono-saccharides． Its contents in branches fluctuated from 15．96 to 13．10 mg/g,in roots from 24．42 to 3．09mg／g(from March 27 to May 18)．Then it is important to collect birch sap according to its physiological changes with time．
Progress in resenrch on water use efficiency of wheat
Zhang Zhengbin, Shan Lun
1997, 5(3): 28-32.
Abstract(661) PDF(730)
Abstract:
The models for estimation of water use efficiency in leaf and canopy levels of wheat are introduced in this paper and the progress the research on water use efficiency and photosynthesis of heat also reviewed,thus providing some information for the agricultural research on water-saving.
Effects of sink-soarce relation on water use efficlency of wheat
Liu Mengyu
1997, 5(3): 33-36.
Abstract(912) PDF(729)
Abstract:
The relationship between the changes of sink-source and water use efficiency (WUE)in wheat(Triticum aestivunt L)was studied under the conditions of increasing the ratio of sink／source by cutting leaves and changing grain number of male sterile and male fertile line．Th results showed that the ratio of sink／source．grain number and photosynthetic rate are positive in relevant with WUE．Enlarging sink capacity by increasing grain number and grain weight and raising source supply ability by strengthening the leaf activity coold increase yield，resulting in high WUE．
Variations of root,leaf water potentials and stomatal resistance among ten millet varieties
Zhang Xiying, Ji Guisu
1997, 5(3): 37-39.
Abstract(1482) PDF(889)
Abstract:
Results from field experiments showed that there are differences among tell millet varieties(Setaria itallca Beauv)in root length，root distribution along soil profile，leaf area，plant height，leaf water potential and stomatal conductivity．The results could be some useful for choosing drought-resistant millet varieties.
The changes of ecological environment in the remaking process of the eroded land by sand and wind
Zhang Xiyou, Duan Zhenghu
1997, 5(3): 40-44.
Abstract(1014) PDF(924)
Abstract:
The characters of the changes of eco-environment during the improvement of the eroded land by sand and wind in Yucheng City of Shandong Province were studied based on the investigations on microclimate,sand of wind ,soil nutrient contents,soil microbiology,soil physical characters and vegetation communities.The results showed that the frail eco-environment can be protected and improved by comprehensive management.
The possible influence of future climate change on cotton production,and disease and insect pests in Hebei Province
Wang Qinying
1997, 5(3): 45-48.
Abstract(1062) PDF(959)
Abstract:
Based on the results calculated by Zhao Zongci．who used the GCM models from USA to forcast the possible changes of land surface temperature and precipitation in China when doubled CO2 occurred，the possible climate change during cotton growth period in Hebei Province and its influences on cotton distribution，planting pattern．yield，quanlity，disuse and insect pests were initially predicted under doubled CO2 condition,The results indicated that under doubled CO2 condition,the regions suitable for cotton growth would be enlarged，multiple crop index would be increased．yield and quanlity of cotton would be also raised；damage of some cotton disease and insect pests might be heavier，that of others might be lower．
An assessment on the benefits of yield Increase and water conservancy resulting from development of farmland forest shelter belts
Yang Yonghui, Bi Xudai, Chen Libiao
1997, 5(3): 49-53.
Abstract(1404) PDF(942)
Abstract:
Based on arnalysis of the published information about the results of field protective forest，it is concluded that yield of grain crops was increased by 14．9% and cotton by 4．6%，evapotranspiration WaS decreased by 16．0% by the forest shelter belts n Hebe Province.According to statistic data and calculations，it is estimated that the effectively protected cultivated land in Hebei Province by the forest shelter belts takes up about 34．7％ of the total farmland．Further calculation shows that，in Hebei Provincet annua1 water saved by forest shelter belts in farmland is worthy 0．286 to 0．327 billion Yuan in terms of agricuhural investment for irrigation；the economic benefits from yield increase is about 1．109 billion Yuan annually；then the total ecoeconomic benefita are about 1．395 to 1．436 billion Yuan.
On the compensation mechanism of forest ecological resources
Hou Yuankai, Xu Rongyao
1997, 5(3): 54-58.
Abstract(826) PDF(816)
Abstract:
The establishment Of compensation mechanisms of forest ecologicaI resources is discussed which involves compensation base，target and scope，purpose，ways，amount and celculatioa methods,possible difficulties and obstacles for carrirng out the ecological compensation．The current theory on commodity value isn’t suitable to assess the value of forest eco-logical resources.But from the view of psychology，principles of classification of ecological forest and commodity forest as well as the functional targets of ecological forest can be dectided ，then the compensation value for forest ecological resources can be estimated.
Sustainable agriculture goals and its guarantee system
Jin Leshan, Zhang Farui
1997, 5(3): 59-62.
Abstract(1189) PDF(777)
Abstract:
The sustainable agriculture can be defined by its goals which are agricultural production sustainability，economic sustainability，ecological sustainability and rural social sustainability．A guarantee system which is mainly composed of law,technology，education and rural infrastructure investment has to be established to meet the goals of sustainable agriculture．
Establishment of eco-agricultural decision supporting system
Cao Ccougui, Zhang Guangyuan, Wang Yunhua
1997, 5(3): 63-66.
Abstract(1171) PDF(852)
Abstract:
The eco-agricultural decision supporting system (EADSS)is set up in accordance with the needs of eco-agricultural development.The concept,designing thinking,component,structure and functions of the EADSS are discussed,
A research on monitoring the dynamics of ecoeconomic system of arable land
Huang Xianjin, Qu Futian
1997, 5(3): 67-70.
Abstract(1091) PDF(802)
Abstract:
Based on analysis of the four characters of ecoeconomic system of arable land in China: the fluctuation in motion,comples in structure,frailty in constitution and delayed management,it is concluded that by carrying out the monitor of the dynamics of arable land ecoeconomic system,the management of arable land can be changed form static and passive states to dynamic and initiative states to realize the goals of adjustment of the arable land ecoeconomic system in advance and effectively protect the arable land.Then the basic meaning,sources,signs and degrees of the forewarning system as well as the train of thought and methods for forming the mechanisms of monitoring the dynamics of arable land ecoeconomy in China are extensively discussed in the paper.
Planning and construction of ecological engineering and rural development--A case study from Mazhuang village,Xinji,Hebei Province
Li Ji, Lin Yuanzhe, Han Jianhui
1997, 5(3): 71-73.
Abstract(1484) PDF(1067)
Abstract:
A case study on planning and construction of ecological engineering at a village level was carried out at Mazhuang Village,Xinji City of Hebei Province. The results testified that the application of village ecological engineering which includes installation horticulture as the key,plus forest, fruit,grass and animal husbandary is an effective way to construct intensive and high efficiency installation agriculture,and can improve farmland ecoenvironment and increase rural economic development.
A study on the structures of agriculture and animal husbandary and their coordinate development in Shanxi Province
Guo Chang1ian, Nie Hongsheng
1997, 5(3): 74-77.
Abstract(974) PDF(827)
Abstract:
Based on the assessment of the current situations of agriculture and animal husbandary as well as their changes and development in Shanxi Province，and taking the coordinate development as the prerequisite，three sets of plan for adjustment of p1anting and animal husbandary structure are put forward by using the method of systematic analysis，and the possible status of coordinate development after adiustment is analysed．
Sustainable development of artificial ecosystem in arid areas and the theory of dissipative structure
Yan Yisui, Xiao Yanheng
1997, 5(3): 78-80.
Abstract(923) PDF(859)
Abstract:
The theories of dissipative structure and sustainable development are applied to analyse the ecosystems in arid regions.It is suggested that construction and development of man-made oasis ecosystem and application of sustainable development strategy should be essential ways to change desert into ecoeconomic system of dissipative structure.

  冀ICP备05003362号-2

Address：286 Huaizhong Road, Shijiazhuang 050022, China

Tel：86-311-85818007E-mail：editor@sjziam.ac.cn

Supported by: Beijing Renhe Information Technology Co., Ltd.