宁夏平原农田防护林几种树种配置模式综合效益的初步研究

应用技术经济学的原理与方法，对宁夏平原７种不同树种配置模式的抗虫效益、经济效益从定量角度进行评价，并在单项评价的基础上，运用多目标灰色局势决策方法对林带的抗虫效益、经济效益、生态效益和社会效益进行了综合评价．结果表明：①新疆杨与高感天牛杨树品种混交林带的综合效益优于单一杨树品种的林带，新疆杨２行×合作杨２行，实际株数比６∶４的混交模式综合效益较好；②臭椿纯林也是一种综合效益较好的树种配置模式，但臭椿的一些特性又限制了其在农田林网上的发展．

The Initial Study of Comprehensive Benefit of Seven Tree Species Disposition Models in Shelt belt in the Ningxia Plains

With the theories and methods of technical economics,from the quantitative view,the insect resistant benefit and economic benefit of 7 tree species disposition models in the Ningxia plains are evaluated.In addition,based on single evaluation,multi target grey strategy decision method is employed to evaluate insect resistant benefit ,economic benefit,ecological benefit and social benefit.The results are as follows:①The comprehensive benefit of forest belt mixed with Populus alba.var pyramidelis and high insect sensitive poplar varieties is better than that of forest belt with single poplar varieties.The comprehensive benefit of Populus alba.var.pyramidelis 2 lines mixed with Populus opera.2 lines with the real proportion of 6∶4 in plants is better.②Pure forest of Ailanthus altissima is also a good tree species dispositon model that has comprehensive benefit,althought it's development on shelter belt network in farmland is restricted by its characteristics.