文献类型：期刊文献

中文题名：巨尾桉人工林地上部分净生产力及养分循环的研究

英文题名：Above ground Primary Productivity and Nutrient Cycling of Eucalyptus grandis ×E.urophylla Plantation

作者：徐大平[1,2,3] 何其轩[1,2,3] 杨曾奖[1,2,3] 龙友深[1,2,3] 简新华[1,2,3]

第一作者：徐大平

机构：[1]中国林业科学研究院热带林业研究所;[2]广东省开平市国营镇海林场;[3]广东省开平市林业局

年份：1997

卷号：10

期号：4

起止页码：365-372

中文期刊名：林业科学研究

外文期刊名：ROREST RESEARCH

收录：CSTPCD;;Scopus;北大核心:【北大核心1996】；CSCD:【CSCD2011_2012】；

基金：1994~1997年国际科学基金

语种：中文

中文关键词：巨尾桉;净生产力;养分循环;地上部

外文关键词：Eucalyptus grandis× E.urophylla primary productivity nutrient cycling

分类号：S792.390.1

摘要：对１．５～３．５年生巨尾桉扦插苗造林林分的生长、生物量增长、养分积累、凋落物量及其分解、林下植物生物量及养分积累和林分养分循环的调研结果表明，巨尾桉林木生长和生物量增长高峰期为２年生，３年生时开始下降。１．５，２．５和３．５年生林木地上部分生物量分别为１４．５，２８．５和３８．０ｔ／ｈｍ２，林下植物地上部分生物分别为２．６、３．４和６．３ｔ／ｈｍ２。林下植物地上部分的主要养分元素积累占２０％～４０％。林分凋落物年平均为５．６ｔ／ｈｍ２，凋落物年失重率为５５％，１年内凋落物中大部分养分元素已被分解释放，林分能较快地建立起养分循环体系。施Ｎ肥能较好地改善林分的Ｎ吸收和循环速率，如能施Ｐ肥也将会得到较好的效果。
After the investigation on tree growth,tree biomass increment,tree nutrient accumulation,litter fall and it′s decomposition,understorey biomass and nutrient accumulation,nutrient cycling of E.grandis × E.urophylla plantation from 1.5 to 3.5 years old,it is found that the highest growing period of tree diameter and biomass of the plantation was 2 years old, and they were slowing down at 3 years old.Tree biomass of 1.5,2.5 and 3.5 years old plantations were 14.5,28.5 and 38.0 t/hm 2 respectively,and the understorey biomass were 2.6,3.4 and 6.3 t/hm 2 respectively.Nutrient accumulation by understorey was about 20%～40% of total above ground nutrient accumulation.Annual litter fall was 5.6 t/hm 2. Litter decomposition rate was 55% per year and most nutrient content in litter fall was lost to soil in a year.This plantation established nutrient cycling system earlier than the others. N fertilization had improved N accumulation and cycling rate obviously.If there is some P fertilization,trees would grow better.