Free amino acids content and nitrogen mobilization in Panicum maximum

摘要：

15 N‐tracer techniques cannot be used accurately in the field to quantify N mobilisation due to problems of equally and uniformly labelling all the different soil N pools with 15 N.In remaining tissues of grasses following defoliation, protein is degraded to amino acids through the action of protease enzymes ; the amino acids being subsequently transported to leaf meristems to support growth.Potentially therefore, amino acids concentrations could be used as a surrogate for N mobilisation determination in the field.A greenhouse experiment involving 15 N techniques was used to test the hypothesis that, following defoliation of P.maximum,a correlation exists between the N mobilised from leaves and the amino acids concentration of these tissues.

关键词： 15 N organic reserves tropical grass

作者: P.M.Santos J.A.Bendolassi R.Godoy

作者单位: Funded by International Foundation for Science-IFS Centro de Energia Nuclear na Agricultura,CENA/US P,CP 96,13400-970-Piracicaba,SP,Brazil. Embrapa Pecuria Sudeste,CP 339,13560-970-S o Carlos-S P,Brazil

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）