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刺槐是延安市荒山造林的主要树种。在全市30余万亩人工林中,刺槐林占六成以上,其中10年生以上的约5万余亩。多年来,由于没有研究制订出对刺槐林的经营管理技术措施,多数地段只是进行一些抚育修枝,少数地段甚至出现了无计划地择伐,致使林相遭到破坏。为了摸索总结刺槐人工林的经营管理经验,1976——1978年,该市甘谷驿公社代家沟大队林场、麻洞川林场、柳林林场及苏家沟大队林场,先后开展了刺槐人工林的抚育间伐和皆伐更新试验。试验面积共121.7亩,其中块状皆伐66.7亩、抚育间伐55亩。众所周知,抚育间伐和块状皆伐都是经营刺槐林的重要方法。但对刺槐人工林更新来说,我们认为以块状皆伐更为理想。
Robinia pseudoacacia is the main tree species afforestation in the barren hills of Yan’an City. In the city more than 30 acres of plantations, Robinia pseudoacacia accounts for more than Liu Cheng, of which more than 10 years of about 5 acres. Over the years, no technical measures have been taken to develop and manage the Robinia pseudoacacia forests. Most of the plots are only nurtured and pruned. In a few areas, even unplanned deforestation has resulted in the destruction of the forest facies. In order to explore the management experience of Robinia pseudoacacia plantation, 1976 - 1978, the city Ganguyi commune Daijiagou team forest farm, Ma Dongchuan forest farm, Liulin forest farm and Sujiagou team farm, has carried out the cultivation of Robinia pseudoacacia plantation Thinning and clear cutting renewal test. A total area of 121.7 mu of experimental area, of which block-like cutting of 66.7 acres, tending thinning 55 acres. It is well-known that tending thinning and massive clearing are all important ways to run a locust forest. However, for the regeneration of Robinia pseudoacacia plantation, we think it is more desirable to clear the block.