运用层次分析法优选临夏北塬农田防护林树种

选取对农田防护林体系有重要影响的树种适应性、树种防护效果和社会经济状况3大类13个指标,利用层次分析法,对所选10个树种(或无性系)进行优选评价.结果表明,在影响优选评价因子中,树种的保存率贡献率最大,说明选择适生树种是营造农田防护林成功的前提;防护效果评价因子,尤其是树种的防风效果,是农田防护林能否得到充分发挥综合防护效益的关键,对优选分析评价具有重要影响;同时考虑农村社会经济方面因素,才能得出客观、准确的优选评价结果.10个树种(或无性系)优选评价排序为:苏柳J172＞苏柳J369＞苏柳J194＞青刚柳＞准噶尔柳＞二白杨＞新疆杨＞河北杨＞三倍体毛白杨BT85＞三倍体毛白杨B1008.

Selecting Optimum Tree Species of Farmland Protection Forest in Linxia Beiyuan by Analytical Hierarchy Process

The optimum evaluation of ten types of tree species(or clones) has been accomplished, including 13 indexes of 3 categories, such as adaptability and protecting effect of tree species, social economic situation by using the analytical hierarchy process(AHP).Results showed: Among all evaluation factors, the conservation rate of tree species makes the largest contribution to optimum evaluation, indicating selecting suitable tree species is the presupposition of construction protection forest. The windbreak effect of tree species is the key of playing a synthetically protection role of farmland protection forest. Besides, only considering social economic factors can a objective and exact conclusion be obtained. The optimum evaluation of ten types of tree species(or clones) is lined as follows:Salix J172> Salix J369> Salix J194> Salix sonjarica> Salix bylonica > Populus gansuensis C.Wang et H.L. Yang> Populus alba L.var.pyramidalis Bge > Populus hopeiensis Hu et Chow > Populus BT85> Populus B1008.