Seasonal variation of water use patterns of strangler fig F. tinctoria in the tropical rainforest in Xishuangbanna,SW China

An experiment was conducted under continuous drying conditions in the field to examine root system growth in relation to water extraction pattern by winter wheat from 1995-1996 at Luancheng Experimental Station of Agricultural Ecosystems, Chinese Academy of Sciences which is located in the North China Plain.

In order to understand the relations between land use types and enviro nmental risks of acid sulfate soils (ASS), followed to provide scientific basis for a wise use and effective management of the ASS, the situation of acid hazard and Al toxicity in the ASS were studied through acid and Al forms test and synt hesis.

Karst mountain is a typical fragile ecological environment and its soil resource is congenitally deficient and affected by the land use patterns.

In order to describe quantitatively the fertility development of degraded red soils,50 surface soil samples with three land uses,developed on quaternary red clay,were collected from different sites of the Jin-Qu basin,Zhejiang province.

Comparison analysis on mode of biomass energy utilization;

A study on diversity and biomass of plant community in different utilization of degenerative steppe in Yanchi County,Ningxia;

Fertility of Red Upland Soil and Effects of Fertilization and Utilization on its Fertility;

【Method】Land use patterns were selected in a small watershed of subtropical region of China for taking and analysing soil samples to compare the changes in soil organic carbon and nutrient contents, mineralization of soil organic carbon, and soil micr.

Quantity and the properties of the surface of root and rhizosphere soil sample from five different land use patterns on southwest of Shandong were studied by chemical analysis and microbial plate culture.