气候变化领域集成服务门户(CCPortal): Improving dryland cropping system nitrogen balance with no-tillage and nitrogen fertilization

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DOI	10.1002/jpln.201800630
	Improving dryland cropping system nitrogen balance with no-tillage and nitrogen fertilization
	Sainju U.M.; Ghimire R.; Pradhan G.P.
发表日期	2019
ISSN	14368730
起始页码	374
结束页码	384
卷号	182 期号:3
英文摘要	Studies on N balance due to N inputs and outputs and soil N retention to measure cropping system performance and environmental sustainability are limited due to the complexity of measurements of some parameters. We measured N balance based on N inputs and outputs and soil N retention under dryland agroecosystem affected by cropping system and N fertilization from 2006 to 2011 in the northern Great Plains, USA. Cropping systems were conventional tillage barley (Hordeum vulgaris L.)–fallow (CTB-F), no-tillage barley–fallow (NTB-F), no-tillage barley–pea (Pisum sativum L.) (NTB-P), and no-tillage continuous barley (NTCB). In these cropping systems, N was applied to barley at four rates (0, 40, 80, and 120 kg N ha−1), but not to pea and fallow. Total N input due to N fertilization, pea N fixation, soil N mineralization, atmospheric N deposition, nonsymbiotic N fixation, and crop seed N and total N output due to grain N removal, denitrification, volatilization, N leaching, gaseous N (NOx) emissions, surface runoff, and plant senescence were 28–37% greater with NTB-P and NTCB than CTB-F and NTB-F. Total N input and output also increased with increased N rate. Nitrogen accumulation rate at the 0–120 cm soil depth ranged from –32 kg N ha−1 y−1 for CTB-F to 40 kg N ha−1 y−1 for NTB-P and from –22 kg N ha−1 y−1 for N rates of 0 kg N ha−1 to 45 kg N ha−1 y−1 for 120 kg N ha−1. Nitrogen balance ranged from 1 kg N ha−1 y−1 for NTB-P to 74 kg N ha−1 y−1 for CTB-F. Because of increased grain N removal but reduced N loss to the environment and N fertilizer requirement as well as efficient N cycling, NTB-P with 40 kg N ha−1 may enhance agronomic performance and environmental sustainability while reducing N inputs compared to other management practices. WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
英文关键词	dryland cropping system; management practices; nitrogen budget; nitrogen input; nitrogen output
来源期刊	Journal of Plant Nutrition and Soil Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176423
作者单位	USDA, Agricultural Research Service, Northern Plains Agricultural Research Laboratory, Sidney, MT 59270, United States; New Mexico State University, Clovis, NM 88101, United States; North Dakota State University, Williston Research and Extension Center, Williston, ND 58801, United States
推荐引用方式 GB/T 7714	Sainju U.M.,Ghimire R.,Pradhan G.P.. Improving dryland cropping system nitrogen balance with no-tillage and nitrogen fertilization[J],2019,182(3).
APA	Sainju U.M.,Ghimire R.,&Pradhan G.P..(2019).Improving dryland cropping system nitrogen balance with no-tillage and nitrogen fertilization.Journal of Plant Nutrition and Soil Science,182(3).
MLA	Sainju U.M.,et al."Improving dryland cropping system nitrogen balance with no-tillage and nitrogen fertilization".Journal of Plant Nutrition and Soil Science 182.3(2019).