红松人工林枝叶分解速度及养分动态的研究  

Litter Decomposition Rate and Nutrient Dynamics in Man-Made Korean Pine Forest

作　　者：张放 谭学仁 史凤友 

机构地区：[1]辽宁省森林经营研究所

出　　处：《生态学杂志》1990年第5期14-18,共5页Chinese Journal of Ecology

摘　　要：修枝作为培育无节良材的重要经营措施已被广泛应用于生产,修落的枝叶能为林地提供大量的有机物,分解后提高林地土壤肥力。为了探明红松人工纯林枝叶分解过程中各种营养元素的变化规律。Dry matter weight and nutrient content are measured for 4 groups of needles and branchesof Korean pine.It is showed that fresh needles decompose more quickly than dead needles.The C/N ratio of branch changes slightly after 30 months of decomposition.Calculated nut-rients provided by medium intensity pruning of the 15 years man-made Korean pine forestare:N 21.0kg·ha^(-1),P 2.7kg·ha^(-1),K 6.8kg·ha^(-1),Mg 2.6kg·ha^(-1).The annual litterfallamount is 6.65t·ha^(-1),which contains N 2.14kg·ha^(-1),P 4.1kg·ha^(-1),K 8.1kg·ha^(-1) and Mg15.9kg·ha^(-1).These are undiscountable nutrient sources for the forest floor.

关 键 词：红松林 枝叶分解速度 养分动态 

分 类 号：S791.247[农业科学—林木遗传育种]