岷江上游干旱河谷植被恢复环境优化调控技术研究

针对岷江上游植被恢复困难地段的主要限制因子，进行了３ 年的调控试验及其定位观测研究．结果表明，大面积栽植的土壤环境优化调控技术措施是：头年雨季前水平沟整地，挖中等大小的植坑，同时点播绿肥沙打旺，第２ 年雨季施磷肥植苗；或头年雨季前水平沟整地，挖中等大小的植坑，第２ 年雨季施磷肥植苗同时用石块覆盖．该技术措施简单易行，已在该区推广应用

Environment control techniques for vegetation restoration in dry valley of upper reaches of Minjiang River

Aimed at the principal limiting factors of vegetation restoration in dry valley of upper reaches of Minjiang River, field experiments and plot fixed observations had been conducted for three years. The optimal soil environment control techniques for vegetation restoration in large area were as follows. Before rain season in first year, site preparation along horizontal trench, digging moderate holes, and then, cultivating Astragalus hungheensis were carried out. When rain season in second year coming, P fertilizer was applied in holes, and tree seedlings were planted. Alternatively, before rain season in first year, site preparation along horizontal trench and digging moderate holes were carried out. When rain season in second year coming, P fertilizer was applied in holes, tree seedlings were planted, and all holes were covered by stones. These techniques were easily practicable, and expended in the region.