Long‐term effects of annual applications of N and S fertilizers to grassland on forage yield,root mass,and soil pH,organic C and N on a Dark Gray Chernozem in north‐central Saskatchewan

摘要：

Many soils in the Parkland region of Prairie Provinces of Canada contain insufficient amounts of both plant‐ available N and S for high crop yields.Application of N and/or S fertilizers on grasslands can acidify soil or alter some other soil properties, but also improve soil quality (Malhi et al.1991).The objective of this study was to determine the effects of long‐ term N, S and/or K fertilization on forage dry matter yield (DMY), root mass, plant species composition, and soil pH, total organic C (TOC) and N (TON), and light fraction organic C (LFOC) and N (LFON).

关键词： Forage yield N and S fertilization plant species composition soil organic C and N soil pH soil quality

作者: S.S.Malhi M.Nyborg

作者单位: Agriculture and Agri-Food Canada,P.O.Box 1240,Melfort,SaskatcheWAn,Canada S0 E 1A0 Department of ReneWAble Resources,University of Alberta,Edmonton,Alberta,Canada

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）