Soil nitrogen and its fractions between long-term conventional and no-tillage systems with straw retention in dryland farming in northern China

doi:10.1016/j.geoderma.2016.02.001

	Soil nitrogen and its fractions between long-term conventional and no-tillage systems with straw retention in dryland farming in northern China
	Zhang, Hengheng 1,2; Zhang, Yanqing 1,2; Yan, Changrong 1,2; Liu, Enke 1,2; Chen, Baoqing 1,2
刊名	GEODERMA
	2016
卷号	269 页码:138-144
关键词	No-tillage Conventional tillage Soil total nitrogen Labile soil organic nitrogen Soil NO3-N and NH4-N
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2016.02.001
通讯作者	Zhang, Hengheng
英文摘要	Knowledge about the changes in soil nitrogen pools under different tillage managements is necessary to assess the feasibility of adoption of conservation practices for sustaining productivity and protecting the environment in dryland farming in northern China. We investigated the long-term effects (22 years) of no-till with residue retention (NTR) on total soil N and its fractions in a dry-land winter wheat (Triticum aestivum L.) cropping system in northern China. Compared with conventional tillage without residue retention (CT), significantly higher soil total N (STN) concentrations were observed in the surface soil layer (0-10 cm) under NTR. Meanwhile, more soil N accumulated for the whole soil profile (0 to 60 cm) in the NTR (3.38 Mg ha(-1)) treatment relative to the CT (3.17 Mg ha(-1)) treatment. The particulate organic matter N (PON), microbial biomass N (MBN), and water extractable organic N (WEON) levels in the NTR treatments were 52.3%, 116%, and 69.4% greater at a depth of 0-5 cm and 41.6%, 108%, and 44.9% greater at a depth of 5-10 cm, respectively, compared with the CT treatment. However, no differences were observed below the 10 cm layer. At a depth of 0-60 cm, the soil NH4-N content under CT was higher than that under NTR However, the soil NO3-N contents in the NTR treatments were significantly greater at a depth of 0-10 cm and were not significantly different at a depth of 10-60 cm, relative to the CT treatment. Significantly positive correlations were observed between the STN and the labile organic N fractions. Overall, the results show that no-till coupled with residue retention is an effective management method for improving soil N stocks and increasing soil fertility. Nonetheless, other benefits associated with NT and residue retention present greater challenges regarding their popularization and application in the dryland farming areas in northern China. (C) 2016 Elsevier B.V. All rights reserved.
学科主题	Soil Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000371946700016
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19696]
专题	农业环境与可持续发展研究所_职能部门
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China 2.Minist Agr Peoples Republ China MOA, Key Lab Dryland Agr, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hengheng,Zhang, Yanqing,Yan, Changrong,et al. Soil nitrogen and its fractions between long-term conventional and no-tillage systems with straw retention in dryland farming in northern China[J]. GEODERMA,2016,269:138-144.
APA	Zhang, Hengheng,Zhang, Yanqing,Yan, Changrong,Liu, Enke,&Chen, Baoqing.(2016).Soil nitrogen and its fractions between long-term conventional and no-tillage systems with straw retention in dryland farming in northern China.GEODERMA,269,138-144.
MLA	Zhang, Hengheng,et al."Soil nitrogen and its fractions between long-term conventional and no-tillage systems with straw retention in dryland farming in northern China".GEODERMA 269(2016):138-144.