SOIL AND WATER CONSERVATION IN CHINA

Should Pay Attention to the Issues of Mine Vegetation Rehabilitation Works YANG Jian-jie, ZHENG Wen-mei, GUO jiang （ Qian＇ an Forestry Bureau, Qian＇ an, Hebei 064400, China） （33） Mining development has promoted the development of economy, but at the same time, it also has destroyed ecological environment. In order to improve the ecological environment of mining area and realize the sustainable development of mining economy, the paper introduced one by one the government functions and issues of the principal part of a project, overall planning, security, economic benefit, selection of tree species, technique and mode of reforestation and management and protection after vegetation rehabilitation of mine that should pay atten-tion to.     

SOIL AND WATER CONSERVATION IN CHINA

Ecological Compensation Mechanism of Drinking Water Source……WANG Shu-yun, GENG Lei-hua, HUANG Yong, et al. （ State Key Lab of Hydrology and Water Resources and Hydraulic Engineering Science,     

SOIL AND WATER CONSERVATION IN CHINA

Critical Study on Influence of Precipitation and Vegetation Coupling of Typical Area in the Loess Plateau to Erosion and Sediment Yield
The influence of precipitation and vegetation coupling to soil erosion is an important issue of surface erosion process study. The paper analyzed the influence of precipitation and vegetation coupling to soil erosion from microscopic point of view based on the observed data of runoff plots of artificial grassland and natural grassland of Xifeng Soil and Water Conservation Experimental Station in the period of 1954 - 1986. The outcomes show that when the vegetation coverage is smaller than 10% , the extreme erosion modulus is increased along with the in- crease of vegetation coverage. This shows that the coverage should not be lower than 10% for effective anti-erosion. When the vegetation cov- erage is greater than 10%, the extreme erosion modulus shows good power function relationship with vegetation coverage. The vegetation cov- erage should at least reach to 70% if hoping the anti-erosion ability playing a maior role and achieving optimal effect.     

SOIL AND WATER CONSERVATION IN CHINA

Effects of Soil Amelioration with Different Soil and Water Conservation Measures of Eroded Red Soil Region YU Rong-gang, ………………………………………………ANG Jie, WANG Nong, et al. （Jiangxi Provincial Research Institute for Soil and Water Conservation, Nanehang, Jiangxi 330029, China）（40） The paper studied the variations of pH value and nutrient content of slope land in eroded red soil region under the conditions of using dif- ferent soil and water conservation measures and analyzed the effects of soil amelioration with different soil and water conservation measures combining with field survey and laboratory analysis. The outcomes show that the different soil and water conservation measures notably affect the pH value and the contents of organic matter, total nitrogen, available nitrogen, total phosphorus and available phosphorus of eroded red soil region, but the influence to the contents of total potassium and available potassium are not remarkable. Planting forage grass and cultiva- tion measures can remarkably increase the pH value and the contents of organic matter, total nitrogen, available nitrogen, total phosphorus and available phosphorus of the soil and improve the conditions of soil fertility, while the influence of terraced fields to the soil fertility status is not obvious. The soil fertility condition of the studied area is not restricted by potassium. It can utilize organic matter as a simplified index to judge the conditions of soil fertility.     

SOIL AND WATER CONSERVATION IN CHINA

Hydrologic Effect of Canopy Layer of Typical Vegetation in Ecological Rehabilitation Region in the Upper stream of Huangqian Reservoir
CHENG Chuan-min WANG Hua-wei CHEN He-nan（ 1. Tai＇ an Soil and Water Conservation Ecological Monitoring Station, Tai＇ an, Shandong 271000, China; 2. Forestry School of Shandong Agricuhural University, Tai＇ an, Shandong 271018, China）
It studies the hydrological effect of canopy layer of typical vegetation type in the ecological rehabilitation region of soil and water conservation in the upper stream of Huangqian Reservoir in Tai＇ an City of Shandong Province, by using the principle of forest hydrology and water balance and the method of fixed sample plot. The outcomes show that （1）under the conditions of P = 18 mm, the sequence of the canopy interception of different trees in the ecological rehabilitation region is Pinus tabulaeformis 〉 Pinus densiflora 〉 Platycladus orientalis 〉 Quercus acutissima 〉 Robinia pseudoacacia, but the similar law has not been found in the amount of stemflow and the throughfall in forest area, and the canopy interception of the coniferous forest is greater than that of the broadleaf forest.     

英文文摘

In order to ensure the effect of land improvement and the sustainable utilization of land resources of gullied rolling loess area, the paper put forward a way of laying equal stress on solving the difficult issue of land development and improvement and eco-environment protection of the area for each link in the implementation of land improvement works based on correlation theories and methods of landscape pattern and ec-ologieal process, including source-sink landscape theory, patch-corridor-matrix landscape structure theory and landscape security pattern the-ory. It explained the application of landscape pattern and ecological process theory to the land improvement of gullied rolling loess area by talking land improvement of Yangjuan gully in Baota District of Yan＇ an City as an example.