文献类型： 外文期刊

作者： Chen, J. S. ¹ ; Zhu, R. F. ¹ ; Zhang, Y. X. ¹ ;

作者机构： 1.Heilongjiang Acad Agr Sci, Inst Pratacultural Sci, Harbin 150086, Heilongjiang, Peoples R China

关键词： Leymus chinensis;nitrogen addition;yield and yield components;Songnen Plain

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.872； 五年影响因子：3.771 ）

ISSN： 0718-9516

年卷期： 2013 年 13 卷 2 期

页码：

收录情况： SCI

摘要： Nitrogen (N) addition strongly influences community composition and ecosystem functioning. However, little is known about their effects on seeds yield attributes of Leymus chinensis (Trin.) Tzvel. in Songnen Plain, China. A field experiment was evaluated in Songnen Plain to investigate the effects of N addition on seeds yield and yield components of L. chinensis. The experiment consisted of five N addition levels (0, 2.9, 5.9, 9.0, 11.9 g N m(2) yr(-1)) was conducted for two consecutive growing seasons. The results showed that, except spikelet number, the other plant characteristic, such as plant height, leaf area, seed setting rate, 1000-grain weight, and seeds yield, were significantly influenced by N addition in the both growing seasons. With increasing N addition, the reproductive seed setting rate, grains number and weight can improve the seed yield in growing season and heading year. Although N addition has the more significantly effect on the seeds yield and yield components (besides spikelet number) in later fall, raised N addition in topdressing did not cause a standing increase trend. Therefore, from our results, the optimal N addition of application 5.90 g m(-2) with a method of topdressing in late fall were recommended to improve the seed yield and yield components of L. chinensis in Songnen Plain, China.