吉林省长白山区侵蚀沟生物治理的研究

Research on the bioremediation of erosion gullies in Mt.Changbai range of Jilin province

在吉林省长白山区采用生物治理侵蚀沟试验研究，结果表明：采用紫穗槐、胡枝子进行浅沟治理，防治水土流失作用明显，最佳组合为：坡度≤15°地段，紫穗槐、带间距8m和胡枝子、带间距8m；坡度≥15°地段，紫穗槐、带间距4m和胡枝子、带间距4m。采用旱柳4—8cm粗的茎干在沟底埋桩进行深沟沟底治理，缓流挂淤作用显著，最佳组合为：横隔间距2m，茎干间距20cm，埋干深度50cm，茎干长度100cm。采用紫穗槐、胡枝子进行深沟沟坡治理，最佳组合为：紫穗槐、带状栽植（株距0．3m、行距1．0m）和胡枝子、带状栽植（株距0．3m、行距1．0m）。

Research on the bioremediation of erosion gullies were conducted in Mt. Changbai range in Jilin province. The results showed that the effects of Amorpha fruticosa and Lespedeza davurica on soil erosion control were significant in shallow gullies remediation. The optimal combinations were ： the width of strip should be 8 m for both A. fruticosa and L davurica when the slope was less than 15°, and the width of strip should be 4 m for the two species when the slope was more than 15°. The effect of Salix matsudana on retarding flow and silt was significant when the 4 - 8 cm diameter stems were buried in deep gullies. The optimal combinations were： 2 cm row spacing, 20 cm intra -row, 50 cm depth, and 100 cm length of stem. The A. fruticosa and L davurica could be used for slope remediation in the deep gullies. The optimal combinations were： 0.3 m row spacing with 1.0 m intra - row spacing for these two species.