竹林养分循环规律研究──Ⅲ.毛竹纯林竹秆流及其养分输入  

Research on Nutrient Elements Cycle in Bamboo Stands Ⅲ.Bamboo Stem Run-off and Nutrient Elements Input in Pure Moso Staud

作　　者：方敏瑜[1] 傅懋毅[1] 谢锦忠[1] 

机构地区：[1]中国林科院亚热带林业研究所,浙江富阳311400

出　　处：《竹子研究汇刊》1998年第2期59-64,共6页Journal of Bamboo Research

基　　金：加拿大国际发展研究中心(IDRC)的资助

摘　　要：在我国毛竹主要产区浙江省安吉县灵峰寺林场试验林的三个区组中，根据立竹直径分布规律确定样竹处理数后，随机布置总共30套秆流收集装置，持续观察21个月，共获91次秆流水。测定每次秆流水量并分析其N、P、K、Ca、Mg含量以研究毛竹林内秆流的变化动态及其养分输入。结果表明：秆流水中不含Ca，其它四元素的年输入量分别为N-1．8557，P-0．0072，K-0.7849，Mg-0.1569，Kg.ha－1；年秆流量为年降水量的12．5％，无论次、月秆流量与相应降水量均为紧密线性相关，但与立竹粗度为显著非线性相关；其它因子，如：立竹所处的坡位、坡向，竹林密度，钩梢强度，立竹分布状况，植株个体表面结构特征等，亦直接或间接地影响着竹秆流的产生和大小。Based on standing bamboo diameter distribution, 30 sets of collectors for bamboo stem run-off were set up at rand0m for 21-month-long on-the-spot oberservation at threetrial blocks located in Linfengsi forest farm,Anji County,Zhejiang Province which is one ofvital moso production areas in China, targeting at finding out bamboo step run-of dynamicand nutrient element input in moso stand by measuring their stem run-off and contents of N,P,K,Ca,Mg each time.The results showed: in the run-off,no Ca element,the content of N,P,K,Mg is 1. 8557, 0. 0072, 0. 7849, 0- l569 Kg/ha respectively ;annual bamboo stem run-0ffis l2. 5% of the annual rainfall;bamboo stem run-off of each time,and month has a close lin-ear relationship with corresponding annual rainfall,but a marked non-linear relationship with standing bamboo density, meanwhile, other factors haves also direct or indirect effects on bamboo step run-off, e. g. slope site/directi0n, standing bamboo density, tipping tensity,standing bamboo distribution,surface structure features of individual bamboo,etc.

关 键 词：毛竹 纯林 秆流 降水 养分输入 

分 类 号：S795.720.1[农业科学—林木遗传育种]