会议专题

Effects of mulching management on soil and foliar C, N and P stoichiometry in bamboo (Phyllostachys violascens)

  Mulching with rice straw and chaff in bamboo (Phyllostachys violascens) plantations for early shooting and high profit resulted in stand degradation in Zhejiang,China.The present study explored the possible mechanisms of degradation by analysing the effects of intensive mulching on soil and foliar carbon (C),nitrogen (N),phosphorous (P) stoichiometry in bamboo plantations.Results showed that mulching for 3 and 6 years increased soil C,N,P and the ratios of C∶P and N∶P but decreased soil pH.Mulching decreased foliar C,N and P while increasing the C∶N,C∶P and N∶P ratios.Foliar N∶P ratio had significant positive correlation with soil P and pH and significant negative correlation with soil N∶P and C:P ratios.It appeared that changes in soil C,N and P stoichiometry caused by long-term mulching management resulted in (1) enhanced function of P as the limiting factor and (2) soil acidification.Therefore,bamboo stand degradation caused by mulching management may be ascribed to imbalance in the relationship between C,N and P,inhibited absorption of N and P by roots as well as decreased foliar C assimilation capacity.

Stand degradation p limitation soil acidification nutrient imbalance

GUO Ziwu Chen Shuanglin YANG Qingping LI Yingchun ZHUANG Minghao

Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Fuyang County,Zhejiang Province,311400 PR China

国内会议

第十届中国竹业学术大会

浙江丽水

英文

392-400

2014-10-28(万方平台首次上网日期,不代表论文的发表时间)