延安市退耕还林工程林种、树种组成分析研究

林种结构和树种组成是退耕还林工程的关键问题之一,本文分析了延安市退耕还林工程实施以来造林林种和树种组成,指出其存在林种选择上经济林面积过小,使退耕农户从退耕地中收益减少;树种单一,纯林面积过大等问题。建议要因地制宜地发展经济林,适地适树,乔灌草结合,多营造混合林。

Research on Forest Category and Species Composition in the Conversion of Cropland to Forest Project in Yan'an Prefecture

Forest category and tree species is a very important issue in implementation of the Conversion of Cropland to Forest Project(CCFP).Investigation and analysis of forest category and tree species composition reveals that the main problem is economic forest area is too small,generating less economic benefits gained by farmers who have participated in the project,and that species selection was narrowed to single species which led to larger area of pure forest.It is suggested that economic forest shall be expanded and selection of species should stick to the principle of right tree for fitting sites,giving consideration of grass and shrubs,so as to have more mixed forests.