摘要
有机肥料中的碳含量与氮素释放关系很大。不同方法测定的C，N及其组成的C／N比与氮素释放和植物吸收氮的关系不同。有机肥料的全碳及碳氮联合测定的氮素之比（C／N比）和氮素矿化率成直线关系，和植物吸收氮素成幂函数相关。在C／N比低于17～21时，有机肥料开始释放无机氮，在C／N比小于14时，植物才能大量吸收有机有肥料中的氮素。
There was a significant correlation between the carbon content and nitrogen release in organec manures. The correlation between c .N and C/N, and N release and plant uptake varied with the determination methods. There was linear correlation between the ratio of total carbon to nitrogen, and nitrogen minerl ization tate, when both C and N were delermined simultaneously. The nitrogen absorbed by plant was exponentially correlated to C/N ratio. The inorganic nitrogen in organic manures began to re lease if the C/N was less than 17~21. The plant began to absorb nitrogen in a large amount if the C/Nwas less than 14.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
1996年第5期57-62,共6页
Journal of China Agricultural University
基金
高等学校博士学科点专项科研基金
关键词
有机肥料
氮素
植物吸收氮
碳氮比
organic manure
nitrogen
nitrogen absorbed by plant
C/N ratio
