作　　者： ; ;

机构地区： 白城市农业科学院

出　　处： 《河南职业技术师范学院学报》 2004年第1期1-4,共4页

摘　　要： 针对我国华北地区冬小麦生产中所面临的水资源不足、氮素污染和秸秆资源严重浪费等问题,自1999年,中国农业大学和德国霍恩海姆大学(HohenheimUniversityofGermany)开展了华北平原作物高产高生产力条件下环境可承受的持续农业研究。分析结果表明:优化水肥及秸秆还田优化水肥条件下冬小麦总根量显著高于传统水肥,根长密度和根重密度随土层深度递减速度慢,氮肥当季利用率显著提高,但各处理间籽粒产量和水分利用效率差异不明显。 Against a background of a series of serious problems of deficiency of water resources, nitrogen environmental pollution and waste of residue resources in winter wheat production in the North China Plain, China Agricultural University and Hohenheim University of Germany have engaged in the Sino-Germany co-operative project, the environmentally acceptable and sustainable agricultural production with high productivity level in the North China Plain since 1999. The paper reported a part of results of research on winter wheat in the Beijing experimental base of the project in 2000～2001. The results were as follows: The optimized irrigation-optimized fertilization and optimized irrigation-optimized fertilization with crop residues led to significantly more winter wheat total root amount and smaller rate of progressive decrease of the root length density and root weight density with soil getting deep than the traditional irrigation-traditional fertilization. The optimized irrigation-optimized fertilization and optimized irrigation-optimized fertilization with crop residues significantly improved nitrogen use efficiency. Insignificant difference in grain yield and water use efficiency of winter wheat between the three treatments was found.

关 键 词： 优化水肥 冬小麦 根系生长 水氮 冬小麦 传统水肥 利用效率

领　　域： [农业科学] [农业科学] [农业科学]