摘要
通过对六种混农林业类型防护效益与结构特征的调查和分析,初步得出:各类混农林业的防护效益与林木株数、林水平均高度关系不紧密,而与林木覆盖度、林木冠体及林木分布度关系极紧密。
The protectin benefit and structural characteristic of 6 types of agrisilviculture were investigated and analysed.The results showed that the relationship between the protection benefit of each type of agrisilviculture and the number of trees,the average heightof trees was not close,but the protection benefit is in close relationship with the degreeof crown cover and the crown form of trees aswell as with the range degree of trees.
出处
《陕西林业科技》
北大核心
1989年第2期23-27,共5页
Shaanxi Forest Science and Technology
