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在林区的各种迹地以及疏林地、低价值林地上如何营造混交林?针、阔叶树种又怎样配置?是一个值得探讨的问题。大量资料证明,黑龙江省各林区天然更新的幼树不仅种类多,数量亦大。主要树种有杨、桦、柞、榆、槭、椴、柳、水曲柳和胡桃楸等;每公顷更新的幼苗、幼树少则数千株,多则几万株。这是恢复森林极为有利的因素。通过调查和试验,我认为一个较好的混交途径是:充分利用已更新的或即将更新起的天然阔叶树,以不同的配置方式因地制宜的引进针叶树种,培育成较理想的针阔叶混交林。现将调查和试验情况简介如下。
It is worth discussing how to create mixed forest on various land areas in the forest area, and on sparse forest land and low-value forest land. How do we allocate needles and broad-leaved tree species? A large number of data prove that the natural regeneration of saplings in various forest areas in Heilongjiang Province is not only more, but also larger in quantity. The main species are Yang, birch, oak, elm, maple, linden, willow, ash and Juglans mandshurica; hectares per hectare of young seedlings, young trees, ranging from thousands of thousands, as many as tens of thousands of strains. This is a very favorable factor for forest restoration. Through investigation and experimentation, I think that a better way to mix is by making full use of natural broad-leaved trees, which have been renewed or are about to be renewed, to introduce the coniferous species according to different local conditions and cultivate them into ideal coniferous and broad-leaved mixed forests. Now the investigation and test conditions are as follows.