摘要
通过对8年生马占相恩人工林生态系统养分积累与分配的研究，结果表明：林地土壤0-50cm土层内全c积累量为69090kg·hm^-2，全N积累量为3725kg·hm^-2，全P积累量为647kg·hm^-2，交换性K积累量为648kg·hm^-2，交换性Ca积累量为987kg·hm^-2，交换性Mg积累量为63kg·hm^-2；凋落物养分积累量N为58．764kg·hm^-2·a^-1，P积累量为1．608kg·hm^-2·a^-1，K积累量为9．021kg·hm^-2·a^-1，Ca积累量为22．898kg·hm-2·a^-1，Mg积累量为4．079kg·hm^-2·a^-1；人工林林分各元素积累量N为277．04kg·hm^-2、P为7．72kg·hm^-2、K为57．21kg·hm^-2、Ca为93．22kg·hm^-2、Mg为10．24kg·hm^-2；林下植被养分积累量N、P、K、Ca、Mg分别为35．40、2．67、29．47、22．38、4．00kg·hm^-2。
Ecosystem nutrient accumulation and distribution of 8-year-old Acacia rnangium plantation were studied. Result shows that ：accumulation of total C in soil layer of 0-50 cm is 69 090 kg·hm^-2;aecumlation of total N is 3 725 kg·hm^-2 ; aceumlation of total P is 647 kg ·hm^-2 ; accumulation of exchangeable K is 648 kg·hm^-2; accumlation of exchangeable Ca is 987 kg·hm^-2 ; accumulation of exchangeable Mg is 63 kg·hm^-2 ; litter nutrient accumulation of N is 58. 764 kg ·hm^-2·a^-1 ;accumulation of P is 1. 608 kg ·hm^-2·a^-1 ;accumulation of K is 9.021 kg ·hm^-2·a^-1;accumulation of Ca is 22.898 kg ·hm^-2·a^-1 ;accumulation of Mg is 4.079 kg ·hm^-2·a^-1 ;N, P, K,Ca,Mg （ amount of each element of plantation stand） is 277.04, 7.72, 57.21,93.22, 10.24 kg ·hm^-2 ,respectively;N,P,K,Ca,Mg（ amount of nutrient accumulation of undergrowth vegetation） is 35.40,2.67,29.47,22.38,4.00 kg ·hm^-2 respectively.
出处
《防护林科技》
2009年第2期32-34,共3页
Protection Forest Science and Technology
关键词
马占相思
人工林
生态系统
养分积累与分配
Acacia mangium
plantation
ecosystem
nutrient accumulation and distribution
