辽宁农业科学Issue(3)：34-37,4.DOI:10.3969/j.issn.1002-1728.2016.03.009
辽北棕壤土氮肥淋溶特征
Leaching Characteristics of Nitrogen in Brown Soil After Applying Urea
摘要
Abstract
A soil column experiment was conducted to invwstigate the leaching characterstics of nitrogen in brown soil after different N application rate in North China.The result showed that the leaching loss of soil to-tal nitrogen (TN ),NH4 +-N and NO3 --N was increased with increasing application rate of nitrogen,and 35.85% ~47.50% of fertilizer nitrogen was lost with leaching water.The regression equation of TN loss (y) and N application rate (x)was y =0.481 7x +1 97.07(R2 =0.9991 ).The main form of leaching nitrogen was NO3 --N;The accumulation amount of NO3 --N was more than 70% when compared with total nitrogen af-ter 1 2 leaching events,while the proportion of NH4 +-N was less than 3%;NH4 +-N loss mainly occurred in the first 5 leaching events,while NO3 --N and total nitrogen losses continued to be significant till the 9 th leac-hing event.关键词
土壤/氮素/硝态氮/铵态氮/淋溶Key words
Soil/Nitrogen/NO3 --N/NH4 +-N/leaching分类
农业科技引用本文复制引用
牛世伟,安景文,张鑫,隋世江..辽北棕壤土氮肥淋溶特征[J].辽宁农业科学,2016,(3):34-37,4.基金项目
北方旱地合理耕层构建技术及配套耕作机具研究与示范（201303130）；昌图农业购买性资源适量化投入关键技术集成与示范 （）
