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杉楠混交与人工杉木林自养机制的恢复
引用本文:汪思龙,廖利平,邓仕坚,高洪,黄志群.杉楠混交与人工杉木林自养机制的恢复[J].应用生态学报,2000,11(1):33-36.
作者姓名:汪思龙  廖利平  邓仕坚  高洪  黄志群
作者单位:中国科学院沈阳应用生态研究所,沈阳,110015
基金项目:中国科学院重点项目!(KZ952 J1 2 0 2 ),中国科学院重大项目!(KZ951 A1 30 1 ),特别支持项目!(KZ95T 0 4 )共同资助
摘    要:自养机制的形成是人工林可持续经营的目标之一。本研究通过混交模拟杉木人工林不同恢复阶段林分,观察比较发现从退化的杉木林阶段到地带性树种比例较低的混交林、地带性树种比例较高的混交林和地带性树种纯林阶段凋落量、N、P、K、Ca和Mg5种元素的归还量逐渐增加,特别是5种养分元素的循环速率也不断增大,其中N、Mg的循环速率由杉木纯林的0.1左右增大到火力楠纯林的0.5以上,与此同时林分土壤有机质含量和养分含

关 键 词:杉楠混交  自养机制  养分循环速率  人工杉木林

Mixing of Cunninghamia lanceolata with Michelia macclurei and restoration of self-sustaining mechanism in G.lanceolata plantation
WANG Silong,LIAO Liping,DENG Shijian,GAO Hong,HUANG Zhiqun.Mixing of Cunninghamia lanceolata with Michelia macclurei and restoration of self-sustaining mechanism in G.lanceolata plantation[J].Chinese Journal of Applied Ecology,2000,11(1):33-36.
Authors:WANG Silong  LIAO Liping  DENG Shijian  GAO Hong  HUANG Zhiqun
Institution:Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015. slwang@iae.syb.ac.cn
Abstract:The formation of self sustaining mechanism is one of the major objectives for the sustainable management of plantations.In this study,the incorporation of different proportions of native Michelia macclurei into Cunninghamia lanceolata plantation was practiced to restore the degraded C.lanceolata plantation,and the comparison of nutrient cycling characteristics and soil nutrient concentrations was made among four types of plantation stand with different mixed rate of native M.macclurei representing four different restoration stages of degraded C.lanceolata plantations.With the increase of the proportion of M.macclurei in the plantation,the litterfall and returned nutrients N,P,K,Ca and Mg increased.The nutrient cycling efficiency increased significantly, e.g.,that of N and Mg increased from about 0\^1 for the degraded pure C.lanceolata plantation to above 0\^5 for the pure M.macclurei plantation.Soil organic matter and nutrients also elevated.It is suggested that the self sustaining mechanism of the C.lanceolata plantation forest gradually reformed as the proportion of native M.macclurei mixed in the plantation increased. The criteria to determine the proportion of native broad leaved tree species mixed in C.lanceolata plantations for the purpose of sustainable management should be based on whether the self sustaining mechanism was reformed and whether the soil nutrient status was improved.
Keywords:Mixing of  Cunninghamia lanceolata  with  Michelia macclurei    Nutrient  sustaining mechanism  Nutrient cycling efficiency    
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