滨海沙地木麻黄基干林带不同更新方式综合效益分析

采用层次分析法 ,于 2 0 0 2年对滨海沙地木麻黄基干林带不同更新方式的生态、社会、经济及综合效益进行分析 ,结果表明 ,间隔带状采伐更新方式各效益均高于林下套种更新方式。间隔带状采伐更新中 ,1 0m宽采伐带隔带采伐更新 ,其生态、社会及综合效益最高 ,2 0m宽采伐带隔带采伐更新第二 ,而 3 0m宽采伐带隔带采伐更新方式 ,其经济效益最高。林下套种更新方式中 ,林带间伐后林下更新方式 ,其生态、社会、经济及综合效益均比直接在林下套种更新方式高。对于只能进行林下套种更新的木麻黄基干林带 ,根据林带郁闭度作适当间伐调整 ,并选用适应于沿海沙地生长具有一定耐荫性的树种在林下套种 ,可使其综合效益得到明显提高。

ANALYSIS ON COMPREHENSIVE BENEFITS OF DIFFERENT REGENERATION METHODS OF TRUNK SHELTERBELTS OF CASUARINA EQUISETIFOLIA IN COASTAL SANDY SOIL

The ecological,social,economic and comprehensive benefits of different regeneration methods of trunk shelterbelts in Casuarina equisetifolia in coastal sandy soil were analysed by AHP. The results showed that the methods of regeneration by strip-felling were significantly superior to the methods of regeneration by interplanting.In the methods of regeneration by strip-felling,the ecological, social and comprehensive benefits of cutting width in 10 m were higher than any others. The cutting width in 20 m was next while the economical benefits of cutting width in 30*!m was the highest. In the methods of regeneration by interplanting, the ecological, social, economic and comprehensive benefits of which under forest after pregeneration were superior to direct one. As to the trunk shelterbelts of Casuarina equisetifolia which were only regenerated by interplanting, their comprehensive benefits could be improved obviously through pregeneration based on their canopy density and selecting the shade tolerance tree species to interplant.