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杨树属杨柳科,高大落叶乔木,是一种喜光、喜水、育肥的速生阔叶树种。如何确定杨树合理造林密度,是关系到杨树速生丰产的关键。合理造林密度可以充分利用地力,促进林木生长,提高单位面积生长量,获得速生丰产。同时,还可以避免种苗、劳力、资金等浪费,降低造林成本,提高经济价值。究竟如何确定杨树合理造林密度呢?根据实践经验谈谈个人的点滴体会。一、目前造林密度现状目前,我区杨树造林密度普遍偏大,问题不小,对合理密度主张也众说纷云,争论不休。通过近几年实践,使人们对解决合理密度问题的必要性有了新的认识,开始深入开展广泛讨论。造林密度偏大的主要原因有二:第一受李森科“种内无斗争论”的错误论影响,认为造林密度越大越能促进生长,其结果导致生产上的盲目密植,造成种苗、劳力、资金等的浪费;第二被郁闭度理论的束缚过死,
Poplar is a willow family, tall deciduous trees, is a hi light, hi water, fattening fast-growing broadleaf species. How to determine the reasonable afforestation density of poplars is the key to the fast-growing poplar. Reasonable afforestation density can make full use of soil fertility, promote forest growth, increase unit area of growth, access to fast-growing and high yield. At the same time, we can also avoid the waste of seedlings, labor and capital, reduce the cost of afforestation and increase the economic value. How to determine the reasonable afforestation density of poplar? Based on practical experience to talk about personal bit by bit experience. I. Present Situation of Afforestation Density At present, the density of poplar afforestation in our district is generally large, the problem is not small, and there are still controversial arguments about the rational density argument. Through the practice in recent years, people have gained a new understanding of the necessity of solving the problem of reasonable density and have started extensive discussions in depth. There are two main reasons why the density of afforestation is too large: First, influenced by the error theory of “no struggle within species” of Lysenko, the greater the afforestation density, the more it can promote the growth. As a result, the blind planting of production leads to the blind planting of seedlings, labor, Capital and other waste; the second is closed by the theory of canopy density over death,