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太行山低山区枯落物分解及主要营养元素变化
引用本文:璩芳,张万军,刘秀萍.太行山低山区枯落物分解及主要营养元素变化[J].水土保持通报,2010,30(6):41-45.
作者姓名:璩芳  张万军  刘秀萍
作者单位:中国科学院遗传与发育生物学研究所农业资源研究中心, 河北石家庄 050021;中国科学院研究生院, 北京 100039;中国科学院遗传与发育生物学研究所农业资源研究中心, 河北石家庄 050021;中国科学院遗传与发育生物学研究所农业资源研究中心, 河北石家庄 050021
基金项目:河北省科技攻关计划项目
摘    要:应用分解袋法研究了太行山低山区枯落物的分解及主要营养元素的动态变化。结果表明,不同植被类型的枯落物分解损失率差异明显,表现为:刺槐林薄皮木灌草荆条灌草草丛;损失率变化趋势与温度和降雨量变化一致。分解过程中,K,Mn,N元素发生净释放;Na元素有净积累;Ca元素先释放后积累;Zn,P与Ca恰好相反,元素先积累后释放。分解1a后,枯落物各元素总体释放率的大小顺序为:KNMgPMnZnNaCa。太行山各种植被枯落物分解1a来元素归还量都以K量最高,Ca量为负值,各元素总归还量大小依次为:KPMgMnNZnNaCa。太行山22a土壤养分变化,与枯落物归还量大体吻合。

关 键 词:枯落物分解  失重  元素含量  太行山低山区
收稿时间:2010/4/21 0:00:00
修稿时间:2010/5/31 0:00:00

Decomposition of Litter and Its Nutrient Dynamics in Taihang Mountains
QU Fang,ZHANG Wan-jun and LIU Xiu-ping.Decomposition of Litter and Its Nutrient Dynamics in Taihang Mountains[J].Bulletin of Soil and Water Conservation,2010,30(6):41-45.
Authors:QU Fang  ZHANG Wan-jun and LIU Xiu-ping
Affiliation:Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, CAS, Shijiazhuang, Hebei 050021, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, CAS, Shijiazhuang, Hebei 050021, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, CAS, Shijiazhuang, Hebei 050021, China
Abstract:Decomposition of litter and the dynamics of the major elements in litter in Taihang Mountainous area were studied by using litterbag method.Results showed that mass losses of different vegetation types were different,which was in the order of Robinia pseudoacaciaPunica granatum LLeptodermis oblonga shrub bushesVitex negundo shrub bushesgrass.The changes of mass losses during decomposition were consistent with temperature and rainfall.During decomposition,there were significant net releases of K,Mn,and N,while a significant net accumulation of Na.Ca was firstly accumulated and then released,while Zn and P were firstly released and then accumulated.By the release rate of the elements from litter after 12 months of decomposition,the elements were in the order of KNMgPMnZnNaCa.K had the maximum amount of nutrient returned in the process of litter decomposition,while the amount of Ca was negative.By the amount of nutrient returned,the elements were in the order of KPMgMnNZnNaCa.According to soil nutrient analysis,the change of each element content in soil accorded with the nutrient returned of litter.
Keywords:litter  decomposition  mass loss  element content  Taihang Mountains
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