川西云杉人工林种群竞争规律初步研究

Research on the Competitive Laws of ArtificialSpruce Forest Populations

本文根据人工林固定标准地的定位观察资料，研究了川西云杉（Ｐｉｃｅａｂａｌ－ｆｏｕｒｉａｎａ）和云杉（Ｐ．ａｓｐｅｒａｔａ）人工林种群的竞争规律。结果表明：云杉人工种群初期生长缓慢，１２龄前平均生长量为０．０６ｃｍ～０．１１ｃｍ，以后生长加速，１８龄平均生长量为０．４ｃｍ～０．７ｃｍ；２０龄左右可能发生大的种内干扰，有一次较大自疏，但仍未出现年轮宽度的骤增；２６龄时，经人为干扰（间伐），年轮宽度略有增加，说明密度在３０００株／ｈｍ２以上的云杉人工林种群密度仍然过大。采用干扰指数模型分析表明。

おn the basis of position obeservations in fixed standard plots,researches are directed to the population competition laws of artificial Balfour sprua forest and Chinese spruce forest.Results have shown that artificial spruce populations grows slowly at early stage.The competition in populations is the main motive power for the formation of artificial spruce population patterns.