SOIL AND WATER CONSERVATION IN CHINA

The soil of karst tor in Xincheng County of Guangxi Province has the characteristics of thin and infertile soil, poor water retention and frequent drought. The paper selects four kind of water absorbents of Agroforestry Absorbent Polymer （AAP） , NSAP Hi-swell, Jifeng, and MP-3005 during transplanting Lonicera japonica cutting seedlings and studies the influence to the physiochemical properties of soil and the growth of Lonicera japonica in Xincheng County. The outcomes show that a） applying water absorbent can reduce soil bulk density, and in- crease total porosity and capillary porosity, and improve the soil structure, and increase the moisture holding capacity of soil; b） under the condition of soil drought, AAP and MP-3005 can promote the growth of secondary branch, increase the survival rate of seedlings, ensure good growth of Lonicera japonica and contribute to the treatment of desertification and improve the ecological environment of tor region.     

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.