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为了提高山坡地治理效益 ,1996年 ,在更新改造南小河沟山坡地“三低”刺槐林的过程中 ,选择杜仲等 6个经济树种作为更新树种进行试验研究。结果表明 ,杜仲在黄土高原沟壑区生长发育良好 ,可作为该区的造林树种和“三低”刺槐林改造树种加以推广。
In order to improve the efficiency of hillside management, six economic tree species such as Eucommia ulmoides were selected as experimental species in the process of upgrading and rejuvenating the “three low” Robinia pseudoacacia forests in the hillside of Nanxiaohegou in 1996. The results showed that the Eucommia ulmoides grows well in the gully area of the Loess Plateau and can be popularized as an afforestation species and “three low” Robinia pseudoacacia trees in this area.