宁夏北部新疆杨不同结构林分抗虫效应的调查

Research on insect-resistant effect of plantations of different structure of Populus alba var. Pyramidalis in northern ningxia

新疆杨作为宁夏二代林网的主要树种 ,目前已受到光肩星天牛的危害。文章从林业措施防治光肩星天牛这一角度出发 ,对宁夏北部地区不同结构林分中 ,新疆杨的被害情况进行调查研究 ,归纳总结了 4种新疆杨林分结构类型 ,并根据其被害情况 。

Populus alba var. pyramidalis which is the major tree species of the second generation's networks of forest in Ningxia is endagered by Anoplophora glabripennis now.In this paper,from the point of view of prevention and cure of Anoplophora glabripennis by forestry measures,the status of damaged Populus alba var.pyramidalis was investigated in plantations of different structures in northern Ningxia,and 4 structural types of stands were summarized.The insect-resistant effects of each stand type were analy sed on the basis of damaged status.