Multi-Seasonal Nitrogen Recoveries from Crop Residue in Soil and Crop in a Temperate Agro-Ecosystem

doi:10.1371/journal.pone.0133437

	Multi-Seasonal Nitrogen Recoveries from Crop Residue in Soil and Crop in a Temperate Agro-Ecosystem
	Sun, Ci 2; Hu, Guoqing 1,2; Liu, Xiao 1,2; He, Hongbo 2; Zhang, Wei 2; Xie, Hongtu 2; Wu, Yeye 2,3; Cui, Jiehua 2; Zhang, Xudong 2,3
刊名	PLOS ONE
	2015-07-20
卷号	10 期号:7
ISSN号	1932-6203
DOI	10.1371/journal.pone.0133437
英文摘要	In conservation tillage systems, at least 30% of the soil surface was covered by crop residues which generally contain significant amounts of nitrogen (N). However, little is known about the multi-seasonal recoveries of the N derived from these crop residues in soil-crop systems, notably in northeastern China. In a temperate agro-ecosystem, N-15-labeled maize residue was applied to field surfaces in the 1st year (2009). From the 2nd to 4th year (2010-2012), one treatment halted the application of maize residue, whereas the soil in the second treatment was re-applied with unlabeled maize residue. Crop and soil samples were collected after each harvest, and their N-15 enrichments were determined on an isotope ratio mass spectrometer to trace the allocation of N derived from the initially applied maize residue in the soil-crop systems. On average, 8.4% of the maize residue N was recovered in the soil-crop in the 1st year, and the vastmajority (61.9%-91.9%) was recovered during subsequent years. Throughout the experiment, the cumulative recovery of the residue N in the crop increased gradually (18.2%-20.9%), but most of the residue N was retained in the soil, notably in the 0-10 cm soil layer. Compared to the single application, the sequential residue application significantly increased the recovery of the residue N in the soil profile (73.8% vs. 40.9%) and remarkably decreased the total and the initially applied residue derived mineral N along the soil profile. Our results suggested that the residue N was actively involved in N cycling, and its release and recovery in crop and soil profile were controlled by the decomposition process. Sequential residue application significantly enhanced the retention and stabilization of the initially applied residue N in the soil and retarded its translocation along the soil profile.
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	PUBLIC LIBRARY SCIENCE
WOS记录号	WOS:000358546400085
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122137]
专题	中国科学院沈阳应用生态研究所
通讯作者	He, Hongbo
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China 3.Natl Field Observat & Res Stn Shenyang Agroecosys, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Sun, Ci,Hu, Guoqing,Liu, Xiao,et al. Multi-Seasonal Nitrogen Recoveries from Crop Residue in Soil and Crop in a Temperate Agro-Ecosystem[J]. PLOS ONE,2015,10(7).
APA	Sun, Ci.,Hu, Guoqing.,Liu, Xiao.,He, Hongbo.,Zhang, Wei.,...&Zhang, Xudong.(2015).Multi-Seasonal Nitrogen Recoveries from Crop Residue in Soil and Crop in a Temperate Agro-Ecosystem.PLOS ONE,10(7).
MLA	Sun, Ci,et al."Multi-Seasonal Nitrogen Recoveries from Crop Residue in Soil and Crop in a Temperate Agro-Ecosystem".PLOS ONE 10.7(2015).