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Measures for forest and grass vegetation construction in semi-acid areas on the Loess Plateau

TAN Yong~(1,3),WANG Chang-ru~2,LIANG Zong-suo~(1,2),DU Fen~1(1.The Centre of Soil and Water Conservation and Ecological Research,China Academy of Science,Yangling 712100,China;2.Northwest Sci-tech University of Agriculture and Forest,Yangling 712100,China;3.Graduate School of the Chinese Academy of Sciences,Beijing 100039,China)  
Water is the primary limiting factor for forest and grass vegetation construction in semi-acid soils of the Loess Plateau area.On the basis of forest and grass vegetation construction experiences and lessons acquired in past years,the authors have analyzed the influences of vegetation construction and water on each other,and have proposed three measures for forest and grass vegetation construction with water balance as a key feature.Our results show that attention must be paid to the 1) different types of natural vegetation;2) soil water status and soil texture conditions;3) forest and grass distribution and strengthened grassland construction.To improve vegetation construction survivability,conservation must simulate the natural vegetation configuration by selecting trees and grasses that are adapted to the native soils and environment.Finally the authors discuss the future direction and measures for forest and grass vegetation construction in the semi-acid areas of the Loess Plateau.
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