碳、氮比对有机肥料氮素释放和植物吸氮的影响  

Effects of C/N on the Release of Nitrogen from Organic Manures and of Nitrogen Absorbed by Plant

作　　者：李俊良[1] 韩琅丰[2] 江荣风[2] 张福锁[2] 

机构地区：[1]莱阳农学院,山东265200 [2]中国农业大学植物营养系

出　　处：《中国农业大学学报》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

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.

关 键 词：有机肥料 氮素 植物吸收氮 碳氮比 

分 类 号：S141[农业科学—肥料学]