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前言赤松(Pinus densiflora Sieb.et Zucc.)林人工整枝,我省群众素有习惯,也有一定成效。不过对整枝方式和强度还有不同的看法;如有的主张人工整枝,也有的主张天然整枝;有的主张整枝强度大,有的主张整枝强度小。这些不同的看法,已在广大干部和群众中开始引起注意。为了林业生产的需要,我们于1962年春开始在崑嵛山等林场中厚层土的立地条件下,设置整枝试验地,进行了研究。这些试验地,有密林(每公顷有树3600株左右,郁闭度0.7以上),也有疏林(每公顷有树1650株左右,郁闭度0.4左右),共计3组10块标准地。
Foreword Pine (Pinus densiflora Sieb.et Zucc.) Lin artificial pruning, the province has always been a habit of the masses, but also some results. However, there are different views on the way and intensity of pruning; some advocate artificial pruning, others advocate natural pruning; others claim that the pruning strength is high, and some claim that the pruning strength is small. These different views have begun to attract the attention of the broad masses of cadres and the masses. In order to meet the needs of forestry production, we started to set up pruning test sites in the spring of 1962 in the site of thick soil in the Kunyu Mountain Forest Farm, and studied. The test sites include the jungle (about 3600 trees per hectare and the canopy density 0.7 or more) and also the sparse forests (about 1650 trees per hectare and the canopy density around 0.4), for a total of three groups of 10 standard plots.