红松胡桃楸混交林叶枝皮营养元素季节动态  

STUDY ON THE DYNAMICS OF NUTRIENT ELEMENTS IN LEAVES,BRANCHES AND BARKS OF KOREAN PINE AND MANCH-URIAN WALNUT IN MIXED FOREST

作　　者：王政权[1] 刘秀坤[1] 王庆成[1] 潘建忠 

机构地区：[1]东北林业大学 [2]黑龙江省孟家岗林场

出　　处：《东北林业大学学报》1991年第S1期251-257,共7页Journal of Northeast Forestry University

摘　　要：本文应用化学分析方法研究了红松胡桃楸混交林叶枝皮营养元素含量。在整个生长季内,红松胡桃楸混交林中N,P,K,Ca的含量在叶、枝、皮中的分配有较大的差异,并随林木的生长有明显的规律性。新生叶和当年生叶元素含量在它们生长旺盛季节最高,而红松1年生和2午生叶则相对减少;在生长末期,当年生叶元素含量下降,1年生和2年生叶则有所增加。枝条中元素含量变化在树液流动时较高,生长旺盛季节相对减少,生长末期又有所增加。The seasonal dynamics of nutrient elements in leaves, branches and barks of korean pine and manchurian walnut in mixed forest were studied by using the method of chemical analysis in this paper. During the growing season, the contents of N, P, K, Ca in leaves, branch and bark are significantly different. The regularity of element distribution is obviously with tree growth. The level of nutrient elements in new leaves are high in fast growing period,but in old leaves and branch are lower. By the end of growing season, the nutrient elements in new lcaves decrease, in the old leaves, branch and bark, the nutrient elements increase a little.

关 键 词：混交林 营养元素 红松 胡桃楸 

分 类 号：S7[农业科学—林学]