锡林郭勒天然草地牧草TDN与土壤供氮特性的相关性研究  

Study on Correlation between Herbage TDN and Soil Character of Nitrogen Supplying in Xilinguole Grassland

作　　者：金花[1] 贾玉山[2] 邢旗 高娃 刘爱军 

机构地区：[1]内蒙古草原勘察设计院,内蒙古呼和浩特010051 [2]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《中国草地学报》2008年第4期59-63,共5页Chinese Journal of Grassland

基　　金：内蒙古自治区农牧科学院创新基金(2130106)

摘　　要：对牧草TDN与土壤有机质、碱解氮和全氮相关性研究的结果表明：随着退化程度的加剧，土壤有机质含量降低，土壤趋于贫瘠化；土壤养分是牧草养分的根本来源，但并不是所有土层土壤养分均对牧草养分吸收积累有显著影响，只有牧草根系分布较集中的10～30cm土层内的营养才是有效的营养物质来源。The relation of herbage TDN to soil organic matter,total nitrogen and alkaline hydrolysis nitrogen were studied. The results showed that ： （1） contents of soil organic matter were decreased with the degradation increasing, and soil was tending to be impoverlshingl （2）although soil nutrient was the fundamental source for herbage nutrient, the nutrient absorption and accumulation in herbage was not significantly affected by soil nutrient in every layers of soil, the soil nutrients in depths of 10-30cm where herbage roots concentrated was the source of effective nutrients for herbage.

关 键 词：TDN 土壤供氮特性 相关性 

分 类 号：S812-05[农业科学—草业科学]