苹果梨园土壤有机氮组分剖面分异规律  

Differentiation Regularity of Organic Nitrogen Components in Soil Profile of Apple-pear Orchard

作　　者：刘欢[1] 梁运江[1] 刘文利[1] 傅民杰[1] 王吉[1] 

机构地区：[1]延边大学农学院,吉林延吉133002

出　　处：《实验室研究与探索》2015年第2期8-11,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金(31160103)

摘　　要：为了明确苹果梨园不同土层有机氮组分的分布特征,在延边苹果梨园内挖掘剖面,并按土壤自然发生层分层采集样品,采用Bremner有机氮分级法测定苹果梨园土壤各剖面层次有机氮组分含量。结果表明,同一土层,除氨基糖态氮和非酸解氮含量外,其余有机氮组分的含量均为荒地大于苹果梨园土;且随土层加深,苹果梨园土和荒地酸解全氮含量、非酸解氮含量及有机氮各组分含量均呈下降趋势;有机氮各组分含量占全氮的比率不同,酸解氨态氮和氨基酸态氮在酸解有机氮组分中均占有较高比例,尤其是酸解氨态氮在各土层的酸解有机氮组分中均占最高的比例,酸解氨态氮和氨基酸态氮为延边苹果梨园土壤中最重要的有机氮形态。In order to reveal distribution eharacteristics of soil organic nitrogen components in differenl soil layers of apple-pear orchard, we mined soil profile in apple-pear orchard of Korean Autonomous Prefecture of Yanbian of Jilin Province, collected soil samples from different soil genetic horizon, and analyzed each component content of organic nitrogen in different layers of each soil profile. Results showed that contents of organic nitrogen components in wasteland were larger than those in apple-pear orchard soil within same soil layer, so as to the ammonia sugar N and non hydrolysable N. The contents of soil total acid hydrolysable N, non hydrolysable Naml different organic nitrogen components showed a downward trend along with increasing depth of soil layer in apple-pear orchard and wasteland ; The proportion nf each organic nitrogen components accounting for total nitrogen was dit＇trent, amt the percentage of ammonia N and amino acid N accounting for total nitrogen were higher among hydrolysable organic nitrogen componenls, especially the percentage of ammonia N accounting for total nitrogen was the highest. Ammonia N and amino acid N nitrogen were the most important forms of organic nitrogen in apple-pear orchard soil of Korean Atllonomous Prefecture of Yanbian. Results supplemented nitrogen cycle research in orchard soil of North China.

关 键 词：有机氮组分 土壤剖面 苹果梨园 土层 

分 类 号：S153.6[农业科学—土壤学]