【作者】 高俊臣；

【导师】 姚云峰；

【作者基本信息】 内蒙古农业大学 ， 水土保持与荒漠化防治， 2003， 硕士

【摘要】 多年的森林覆被率与环境因子之间的分析研究得出：(1)森林覆被率高的地区降水量大、无霜期延长、大风日数减少、平均风速降低、极端最低气温减小；(2)1、7月份降水量增加；(3)水力侵蚀、风力侵蚀减少、最大洪峰流量降低。森林覆被率在保持水土、涵养水源、改善生态环境方面起着很大作用。 不同密度的林分、不同林种的林分土壤养分含量不同，针阔混交林土壤养分含量高，适宜密度的林分土壤养分也高(如：樟子松2×1m大于2×2m大于疏林)。 从水分平衡分析得出，森林覆被率高出一定值时，地下水位下降，在森林覆被率为29.9％左右时，环境因子处于最佳阶段。 不同林种林分的土壤含水量不同，它们的保水能力也不同，灌木大于乔木(山杏大于小叶杨、刺槐大于油松、侧柏)，不同密度的林分保水能力也不同(赤峰杨2×5m大于10×10m大于2×2m)。 从年轮生长量与降水量温度相关分析得出：该地区降水量是影响森林生长量的主导因子。 在实际生产中要考虑各方面的影响因子，以达到最佳的生态、经济、社会效益。更多还原

【Abstract】 The conclusion through studying on the rate of coverage of forest and environment factor is: (1)The region with high rate of coverage have heavy precipitation and longer frost-free period and reduced big windy days and lower average speed of wind and decreased lowest temperature.(2)Precipitation increase in January and in July.(3)Hydraulic power erode and wind force erode are decreasing , volume of flood peak is lowering. The rate of coverage of forest have an evident effect on many environment factors such as soil and water reservation ecological environment improvement.The nutrient content of various densities of forest and various kinds of forest is different. The nutrient content of mixed forest of conifer and broadleaf and forest with fit density(example, camphor 2#lm> 2X2m> loose forest.).Analyzing the moisture content balance with the rate of forest coverage increase in straight ground water lever fall.Around 29.9% of the rate of forest coverage environment factor stay best stage.Because of different water content ,the same kind of forest is different in ability of water reservation bush > arbor. (Apricot > small-leaf Poplar Locust > CH pine > cypress).Different density of forest have different water reservation ability (Chi Fen poplar2X5m> 10X 10m > 2X2m).The conclusion through correlation analysis on annual ring grow quantity and precipitation and temperature is that the precipitation in local area is the main factor which affect forest growth quantity.In practical production to gain the best ecological and economic and social benefit affecting factors should be considered.更多还原