多树种合理配置抗御光肩星天牛灾害的效益评估及决策

Decision-making and integrated benefit evaluation of resistance to Anoplophora glabripennis disaster by reasonable allocation with different tree species.

该文根据宁夏引黄灌区的具体情况,有目的选择了农田防护林网的6种不同的典型配置模式,建立了具有地区特色的多树种合理配置抗御光肩星天牛灾害综合效益的评价指标体系.按照抗虫效果及其经济效益、生态效益和社会效益指标为目标函数,运用目前国内外通行的多目标灰色局势决策方法,首次全面地对其综合效益进行了评价.旨在从定量的角度,选择一种最优的树种配置模式,在解决光肩星天牛灾害的基础上,达到综合效益最佳.研究结果表明:“65%目标树种+25%非寄主树种+10%诱饵树”模式的综合效益最佳,评价决策值为0.948,既达到了抗御光肩星天牛灾害的目的,又保证了综合效益的最大化;而目标树种纯林模式的综合效益最低,评价决策值仅为0.369 2.

According to the situation of experimental fields of the irrigated areas in Ningxia Hui Autonomous Region, six types of allocation patterns with different tree species in farmland shelter forests were chosen to evaluate the integrated benefit of resisting Anoplophora glabripennis disaster, and the evaluation index system was also established. Multi-target grey strategy decision method was taken to study integrated benefit of different tree species patterns originally. Based on resistance of A. glabripennis disaster, one rational pattern was chosen by rationed evaluation of integrated benefit. The results showed that the pattern of ＂65 % target trees ＋ 25 % non-host trees ＋ 10 % bait trees＂ was the best and the threshold value was 0.945, which can resist A. glabripennis disaster and assure optimized integrated benefit. While the integrated benefit of the pure target trees was the lowest and its threshold value was only 0. 369 2.