【摘要】 科尔沁沙地草牧场防护林效益分析周凤艳雷泽勇周景荣吴德东于红军（辽宁省固沙造林研究所阜新１２３０００）关键词科尔沁沙地，草牧场防护林，效果系数本文于１９９６年１２月３０日收到。本文完成后，承蒙本所邢兆凯高级工程师，沈阳农业大学林学院周学安教授提出修...更多还原

【Abstract】 By means of the statistical method of forest economics and establishment of calculating index system, through quantification of the ecological and economic benefit values, the total value of ecological and economic benefit of the grassland shelterbelts on the Korqin Sandy Land, was objectively evaluated. It was shown that the total effect coefficient of the shelterbelt system on sandy grassland was 4 57, and the total effect coefficient of ecological benefit 42 85, the total effect coefficient of economic benefit 3 29. The transformed value of ecological benefit was 470 79 yuan/hm 2 annually, and the annual income of economic benefit 770 72 yuan/hm 2 in the grassland shelterbelt system on the Korqin Sandy Land. By arranging the basic indexes of ecological and economic benefit in order of its importance it indicated that priority should be given to ecological benefit in the desertificated and semi desertificated areas on the Korqin Sandy Land.更多还原