中国水土保持科学2011，Vol.9Issue(5)：110-114,5.
不同人工施氮量对荆条氮素利用的影响
Effects of nitrogen absorption of Vitex negundo in different nitrogen fertilization levels
摘要
Abstract
Taken Vitex negundo community in Taihang mountainous region as object, this paper studied the effects nitrogen absorption of Vitex negundo in different nitrogen fertilization levels. The main purpose of this paper is to discover the response of plant to different nitrogen environment. Results showed that: 1) Both the contents of nitrogen in mature and withered leaves increased with increased nitrogen fertilization level, and the maximum values occurred at 32 g/m2 nitrogen fertilization level. Nitrogen fertilization had obvious effects on the content of phosphor in mature leaves with the maximum value being at 8 g/m2, which was 2. 29 times that of control. Whereas it had nothing to do with the content of phosphor in withered leaves. 2) Nitrogen fertilization could lead to the decrease of nitrogen resorption efficiency of Vitex negundo. The nitrogen fertilization was negatively correlated with nitrogen resorption efficiency, average decrease being up to 18. 57% . But when nitrogen fertilization level was 4-8 g/m2, the change of nitrogen resorption rate was not obvious. 3) The content of nitrogen in soil increased with increased nitrogen fertilization level. The maximum value of phosphor content in soil was at 4 g/m2 nitrogen fertilization level, and the content of phosphor decreased after that point. Nitrogen resorption efficiency of Vitex negundo negatively correlated with soil organic matter and soil moisture content.关键词
荆条/人工施氮/氮素回收率/太行山Key words
Vitex negundo/nitrogen fertilization/nitrogen resorption efficiency/Taihang mountainous region引用本文复制引用
赵勇,朱彦锋,王谦,陈桢,樊巍,杨喜田..不同人工施氮量对荆条氮素利用的影响[J].中国水土保持科学,2011,9(5):110-114,5.基金项目
国家林业局公益专项“华中地区生态经济型灌木资源培育与开发利用研究”(200904024) （200904024）
河南省科技攻关项目“典型退化生态系统恢复、重建机理及生态工程设计示范研究”(0624090010) （0624090010）
