中国生态农业学报(中英文)

1994, 2(1): 1-5.

Abstract(945) PDF(1070)

Abstract:

1994, 2(1): 6-8.

Abstract(1117) PDF(1141)

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1994, 2(1): 9-11.

Abstract(930) PDF(836)

Abstract:

The Application of Marginal Utility and the Development of High-yield,High-quality and High-benefit Agriculture

Zhang Shen-shen

1994, 2(1): 12-15.

Abstract(1228) PDF(1048)

Abstract:
This paper discusses the role of marginal utility in developing high-yield,high-quality and high-benefit agriculture.Based on summarizing the application of marginal utility to agricultural production and its effects,the author pointed out that extending the scope of the application of marginal utility will play an important role in the development of the high-yield,high-quality and high-benefit agriculture.In addition the problems in applying the marginal utility are discussed.

Utilization of Plant Potentialities to Enhance the Bio-efficiency of Phosphorus in Soil

LIU Jian-zhong, LI Zhen-sheng, LI Ji-yun

1994, 2(1): 16-23.

Abstract(2549) PDF(2016)

Abstract:
Phosphorus defficiency,which seriously limits yields and distribution of crops,is a problem extensively existing in soils around the globe.The tendency of P-defficiency will be aggravated by both the ever increasing requirements for grains and energy crisis caused by population explosion in the world.Therefore,how to improve the efficiency of P-fertilizer and to mobilize the P absorbed and fixed in soil through developing the potentialities existing in plants will play an important role in improving grain yields,reducing production costs and protecting eco-environment.In this paper possibility of enhancing the bioefficiency of P is discussed and mechanisms and genetic studies of the differences in P nutrient characteristics of plants are also reviewed for the pourpose of providing theoretical basis for breeding new varieties which can efficiently utilize P fertilizer and tolerate P-defficiency.

Patterns and Tactics for Agro-economic Development in ECOTONE--A Case Study from Panxi Region in Sichuan Province

WANG Xiao-guang

1994, 2(1): 24-30.

Abstract(1256) PDF(845)

Abstract:
Panxi area in Sichuan Province is unique because of its diversity in mineral deposits and abundant water energy and vertical climatic resources.But the backward agriculture restricts it to become a heavy industrial base in future.The author holds that the cause of the poverty in Panxi area was its inferior resources such as drought and ECOTONE neglected.Based on evaluation of the inferior resources a multi-goal pattern of eco-economic development was put forward,in which ecology,grain production and acquiring rich combined as a whole were transformed in structure to form a coordinated regional developing system.

The Change of Precipitation During the Recent 40 Years and Its Influences on Climatic Productivity in China

PAN Ya-ru, GAO Su-hua, GUO Jian-ping

1994, 2(1): 31-36.

Abstract(1078) PDF(909)

Abstract:
Features of space-time variation of precipitation during the recent 40 years in China and its influences on plant climatic productivity were analysed based on the data from 350 meteorological stations evenly distributed all over China from 1951 to 1990.The results show that rainfall significantly changes with time and region,and its influence on crop yield is becoming smaller.

Influence Factors to Agricultural Technical Innovation in China

Wang Pei-zhi, Huang Huang

1994, 2(1): 37-42.

Abstract(1268) PDF(1024)

Abstract:
Agricultural technical innovations and progresses are motive forces for the development of future agricultural production in China.They are greatly affected by those factors such as demand of technical market,deviation of resource allocation,standard of agricultural research and comparative agricultural benefit and so on,among which the action of system factor on the technical innovation is increasingly great.

The probe of the Ten-years Eco-agricultural Practice in Jilin Province

LI En-ze, ZHANG Yu-fen, LIU Hai-feng

1994, 2(1): 43-48.

Abstract(1050) PDF(1111)

Abstract:
Based on summarizing the experience from the ten-years eco-agricultural practice in Jilin Province the authors discuss the ways for development of different eco-agricultural structure models for different biochore by suiting measures to local conditions. The transaction efficiency of energy and mass flow can be increased by regulation industrial structure.And through developing multi-functional and comprehensive ecosystems remarkable social,economical and ecological benefits can be acheived.

Nutrient Contents in Paulownia and Soil and Their Effects on Witches'Broom

Ding Wei-xin

1994, 2(1): 49-55.

Abstract(1106) PDF(844)

Abstract:
The paper deals with the relationship between contents of available nutrients in soil and nutrients in Paulownia leaves by using comparative analysis,The relation between P/Cu,P/Fe,P/Zn and P/K in soil and that in Paulownia leaves is significant positive correlation (r=0.918^**).This shows that there is a relationship between incidence of Paulownia withches' broom and contents of available nutrients in soil and of elements in leaf.Low phosphorus and high copper contents in soil and the antagonistic action among elements in soil and in plant are the reasons that the contents of potassium and copper in Paulownia leaf are exorbitant and manganese and phosphorus are deficient.So the proper ratios of P:K,Fe:Mn and Cu:Mn are disrupted by the excessive potassium and copper in the leaf ,which,in turn,interferes the normal metabolism of Paulownia and reduce its resistance to witches' broom.

Position and Functions of Anaerobic Digestion in Eco-agriculture

ZHANG Wu-di, ZONG De-bin, SONG Hong-chuan

1994, 2(1): 56-61.

Abstract(1376) PDF(895)

Abstract:
The system of anaerobic digestion plays an important role in eco-agricultural system.It can effectively recover energy and matter from agricultural organic waste materials.By comprehensive utilization of biogas rural economics and eco-environmental sanitation can be improved and good ecological cycle can be formed.

Corn Starch Gel and Plant Tissue Culture I. Effects of Corn Starch Gel Medium on Differentiation and Growth of Malus Zumi and M26

JIAO Shun-xing, CHEN Wen-long

1994, 2(1): 62-67.

Abstract(1247) PDF(1037)

Abstract:
Studies showed that corn starch (CS) as medium gel for tissue culture of Malus zumi and M26 not only raised rooting rate of shoot segments to 87-98%,which was 34% higher than Agar medium,but also had synchronizing effects on rooting induction.When in proliferating culture CS medium promoted differentiation of shoots,especially increased chlorophyll content and width of the seaves.Nevertheless the height of M. Zumi plantlet was relatively inhabited,while the stem width was increased.Such effects of CS gel medium were belived to be mainly dependent on bioactive factors possibly in CS.The authors suggested that CS gel medium could replace Agar to reduce medium cost and be employed in micropropagation of Malus species.

Potential Productivity of Light and Heat Resources and Its Utilization in Winter Wheat Field

SHI Hong-zhi, WANG Tong-zhao

1994, 2(1): 68-72.

Abstract(986) PDF(1021)

Abstract:
The single structure of wheat colony in Huang-Huai Plain results in a low green coverage during the early and late growth period of wheat.Therefore,there exists a great amount of potential light and heat resources available to crops.It is estimated that the amount of this resources are 30.2-32.23Kcal.cm^-2 for light and 819.6-1135.4 C.Day(>0C)for heat respectively with productivity of 950.7-1226.6kg/mu in winter wheat field in Henan Province.Then by changing the planting pattern of winter wheat through intercropped with suitable crops the utilization efficency of solar energy can be significantly increased.

Comparision of Root Characters of Different Winter Wheat Varieties Under Different Soil Water Conditions

ZHANG Xi-ying, WANG Shao-ren

1994, 2(1): 73-76.

Abstract(1242) PDF(866)

Abstract:
Reaults from pot experiment showed that there are obvious differece in secondary root number,root dry weight and root;shoot ratio among different winter wheat varieties.By comparision of root and shoot characters of different varieties under different soil water conditions it can be concluded out that varieties with well developed root system have strong resistance to adverse circumstance.

A Study Yield Model of Rice Growing on Long-cultivated Land in Zhangye City,Gansu Province

XU Cun-cai, WANG Hei-fong, PAN Jin-sheng

1994, 2(1): 77-80.

Abstract(1036) PDF(824)

Abstract:
Effects of nitrogenous and phosphate fertilizers on the yield of rice growing on various long-cultivated land and the relation between the two nutrients were studied by revolving regression designed field experiment.Based on the experimental data a regressive yield model was established.Then by analysis of the model suitable rate of ap;lication of the two fertilizers on present condition can be determined.It was also concluded that for increasing rice yield phosphate fertilizer was more important than nitrogenous fertilizer.

1994 Vol. 2, No. 1