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作 者 ：朱廷曜,孔繁智,朱劲伟,彭瑞林

期 刊 ：生态学报 1991年 11卷 1期 页码：1~6

关键词：防护林；气象效应；疏林草场；

Keywords:protective forest, meteorological effect, grazing forest.,

摘 要 ：本文讨论了科尔沁沙地疏林草场的气象效应和防风效应的风洞模拟实验,结果表明,林内风速随林分郁闭度的增加而减少;林地的粗糙度随郁闭度的增加而增大,相当于林分高度的1/20—1/70。疏林草场与旷野相比,蒸发减少12—20％,蒸腾增加7.3％。

Abstract:An increase in the closeness of the artificial grazing forest from 1.1-2.0% to 9.6% resulted in a decrease in the relative wind speed from 88% to 62%. The closeness of the natural grazing forest in 19% and 59% with mean heights of 7m and 9m, respectively, leads to the relative wind speeds of 65% and 22%, respectively. The results from modeling experiment of grazing forest in a wind tunnel indicate that if the closeness degrees of the grazing forest model are 3 %, 6 % and 25%, the relative wind speed will be...

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