摘要
本文研究了刺槐人工林的蒸腾强度,并对其影响因子进行了回归分析。结果表明:中部叶片蒸腾强度与树冠不同部位的蒸腾强度平均值十分接近;林内标准木的蒸腾强度与各径阶林木蒸腾强度均值基本相同;5龄刺槐蒸腾强度大于13龄,13龄大于18龄;沟底刺槐蒸腾强度大于半阳坡,半阳坡大于阴坡。刺槐蒸腾强度与光照、气温、相对湿度成幂函数关系,与土壤含水量呈现指数函数形式。
This paper studies systematically transpiration intensity in the planted forest of black locust and makes the regression analysis for its mai- nly influential factors.Results show that transpiration intensity of middle canopy leaves is very close to the average value of various crown canopies, the value of standard tree is equal approximately to the average value of va- rious diameter grades in the forest,the value of five-year-old tree is greater than that of thirteen-year-old tree and the value of thirteen-year-old tree greater than that of eighteen-year-old tree.The value of gully bed tree is over that of southwest slop tree and it's over that of northwest slop tree.The v- alue of tree is related in power ruction to sunlight,temperature and relative humidity and related in exponential function to soil water.
出处
《陕西林业科技》
北大核心
1989年第4期12-17,共6页
Shaanxi Forest Science and Technology
