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人工落叶松的间伐工作,从科研到生产国内外都在进行。根据经营目的不同,所采取的间伐方式也不同,即使目的相同,所采取的间伐形式也不尽相同。还有的认为间伐只能提高林木质量,对于增加数量意义不大。但总的来讲,林木郁闭后,分化逐渐严重,必须及时加以经营调节,以促进林木数量与质量的提高,早日达到速生丰产的目的,这是一般的共同愿望。我们为了这个目的,在小兴安岭林区,带岭地区大面积的人工用材林地,于1963年春开始进行了间伐实验。它的内容包括林分的林木分级与林木间伐二个部分。
Artificial larch thinning work, from research to production both at home and abroad. The methods of thinning are also different depending on the purpose of business and the forms of thinning adopted vary with the purpose. Still others think that thinning can only improve the quality of trees, which has little significance for increasing the quantity. However, in general, after the forest is closed, the differentiation is gradually getting worse and serious. It is necessary to adjust the management in time so as to promote the improvement of the quantity and quality of forest trees and achieve the goal of quick-growing and high-yielding as early as possible. This is a common aspiration. For this purpose, we conducted the thinning experiment in the spring of 1963 in the large area of artificial timberland in the forest area of Xiaoxing’anling and in the belt ridge. Its contents include the forest stand classification and the forest cutting two parts.