Table of Content

10 July 1982, Volume 1 Issue 03

Previous Issue    Next Issue

A SURVEY ABOUT COMPARING WITH THE TWO RESULTS BETWEEN THE RATIONAL DEVELOPMENT AND DESTROYING THE FOREST CONTINUOUSLY IN HAINAN ISLAND AFTER THE FOUNDING OF NEW CHINA

Zhu Jifan, Jiang Zhiling

1982, (3):  1-4. 

Asbtract ( 1284 )   PDF (406KB) ( 204 )  

In this paper the authors put forward following four conclusions :1. If the forest is denuded, the fine field will become sandy. If we plant the costal shelterbelt, the sand areas will develop the fine field.2. The more the forest is destroyed, the more the agriculture will be damaged. The more the forest is planted the more the field conservation will be made.3. To plant shelterbelt in the rubber plantation is agood experience.4. The forestry management must take selective cut to combine cut with silviculture.

AN APPROACH TO THE RELATIONSHIP BETWEEN CHANGES OF AGRO-ECOSYSTEM AND OCCURRENCE OF DISEASE AND INSECT PESTS

Qin Xigui

1982, (3):  5-7. 

Asbtract ( 1204 )   PDF (297KB) ( 169 )  

According to the variations of disease and insect pests after the reclamation of uncultivated islet and land, reform of cultivation system and popularization of high-productive improved variety, this paper illustrated the relationship between changes of agro-ecosystem and population of disease and insect and put forward some measures against the occurrence of disease and insect pests.

UTILIZATION OF LAND RESOURCES IN HILLY AND MOUNTAINOUS REGIONS OF SICHUAN PRO VINCE AND ECOEQUILIBRIUM

Yan Changsheng

1982, (3):  8-11. 

Asbtract ( 1227 )   PDF (400KB) ( 219 )  

It is considered by the author that in order to make a rational use,protection and cultivation of land resources in hilly and mountainous regions of Sichuan province, the key to the question is the rational utilization of the hilly lands around the Sichuan basin.The author suggests that it is necessary to increase the forest cover to restore the ecological equilibrium of these regions.

VARIATION OF THE POPULATION STRUCTURE OF NAKED CARPS[GYMNOCYPRIS PRZEWALSKII PRZEWALSKII(KESSLER)] IN THE QINGHAI LAKE AND STOCK UTILIZATION

Zhao Lihua

1982, (3):  12-15. 

Asbtract ( 1264 )   PDF (312KB) ( 212 )  

Investigation showed that in the earliest stage of exploitation, catches greatly exceeded recruitments, population structure changed obviously.Afterwards, the structure kept stable, the growth rate became quicker,sexual maturity was earlier than before,reproduction capacity was increasing and sexual structure changed to favour the females, egglaying stock became younger. In order to properly utilize the stock, it is considered that the mesh of fishnets must be enlarged to prevent over - fishing.

AGROECOLOGICAL ECONOMIC INVESTIGATION OF YANCHI COUNTY IN NINGXIA

Wei Shien, Fang Kun

1982, (3):  16-18,33. 

Asbtract ( 1305 )   PDF (388KB) ( 200 )  

According to the agroecological economic investigation of Yanchi County, the authors analysed the problems of agroecological economy of this county and gave a preliminary approach on the objects and tasks of agroecological economic study.

ON THE ECOLOGICAL IMBALANCE OF LOESS PLATEAU IN HISTORICAL PERIODS AND ITS INFLUENCES

Shi Nianhai

1982, (3):  19-23. 

Asbtract ( 1083 )   PDF (676KB) ( 368 )  

This paper discussed the features of loess plateau in various historical periods, the causes of ecolgical imbalance and its influences. Some measures used to harness the loess plateau were put forward by the author.

WEED ECOLOGY AND ITS ECOLOGICAL CONTROL

Li Yanghan

1982, (3):  24-29. 

Asbtract ( 1168 )   PDF (511KB) ( 177 )  

In this paper, the author expounded that in order to control weeds, the biological characteristics of weeds growing under different conditions should beinvestigated understanding the relationship betwe en weeds and environmental conditionsis the main basis for weed control, especially for its ecological control, The carter must be considered as the main chain, combining with chemical control and other agricultural measures, Only so doing, can the weed control be high-effective, safe and economic.

A COMPREHENSIVE DESCRIPTION ABOUT THE ESTABLISHMENT OF N-FIXING SYSTEM IN FARMLAND

Liu Guofan

1982, (3):  30-33. 

Asbtract ( 1051 )   PDF (393KB) ( 237 )  

From the aspects of the role of biological nitrogen in modern agriculture, current situation of utilization of N-fixing organism resources by agriculture and establishment of N-fixing system in high productive farmland, the position and role of biological nitrogen in modern agriculture were discussed.

ABSORPTION AND ACCUMULATION OF MINERAL ELEMENTS BY PLANTS AND THEIR TYPES

Chen Guojie

1982, (3):  34-37. 

Asbtract ( 1129 )   PDF (395KB) ( 322 )  

In this paper, the chemical compositions of plants and the relationship between it and ecological environment are briefly discussed. The responses of plants to chemical elements in ecological environment and its mechanism are examined. The types of plants for absorbing and accumulating mineral elements are put forward.

THE UNIFIED THOUGHT OF "THE HEAVEN" "THE EARTH" AND "THE HUMAN BEING" IN ANCIENT CHINA

Wang Xunling

1982, (3):  38-41. 

Asbtract ( 1177 )   PDF (384KB) ( 194 )  

An unified thought of "the Heaven" "the Earth" and "the Human Being" derived from agricultural practice is the concept belonging to ecological area.It might be considered as an ideological system of ecology in ancient China. This thought gave certain effects on agriculture, medicine, politics, philosophy and so on our country.