气候变化领域集成服务门户(CCPortal): Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China

CCPortal

DOI	10.1002/jsfa.9800
	Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China
	Hou H.; Yang Y.; Han Z.; Cai H.; Li Z.
发表日期	2019
ISSN	225142
起始页码	5401
结束页码	5408
卷号	99 期号:12
英文摘要	BACKGROUND: An irrigation regime is an important factor in regulating soil CO2 emissions from wheat fields. Deficit irrigation can be applied easily in the fields and has been implemented in northwest China. Previous studies have mainly focused on the effects of deficit irrigation on crop yield and quality. Studies on its environmental impacts are sparse. RESULTS: Soil CO2 fluxes from deficit-irrigated fields were lower than those from full irrigation (CK) during most of the growing season. Cumulative soil CO2 emissions from deficit-irrigated fields were reduced by 10.2–25.5%, compared with the CK. Peaks of soil CO2 fluxes were observed 3–7 days after irrigation in the water-filled pore space (WFPS) range of 65.7–80.4%. Under different irrigation regimes, significant positive correlations were observed between soil CO2 fluxes and WFPS (P < 0.01), but no significant correlations were found between soil CO2 fluxes and soil temperature. Compared to CK, yields for the T1, T2, and T4 were significantly reduced (P < 0.05) but the yield for T3 was only reduced by 2.3% (P > 0.05); T3 significantly reduced soil CO2 emissions by 10.2% (P < 0.05) and reduced the irrigation water amount by 5.7%. CONCLUSION: Deficit irrigation effectively reduced CO2 emissions from winter wheat field soils. T3 may be a water-saving, CO2 emission-reducing and high-yield irrigation regime for winter wheat fields in northwest China. The research laid a preliminary theoretical foundation for formulating winter wheat irrigation systems that are water saving, emission reducing, and that produce high yields. Society of Chemical Industry. Society of Chemical Industry
英文关键词	CO2; deficit irrigation; soil; temperature; WFPS; winter wheat
scopus关键词	carbon dioxide; water; chemistry; China; growth, development and aging; irrigation (agriculture); metabolism; season; soil; wheat; Agricultural Irrigation; Carbon Dioxide; China; Seasons; Soil; Triticum; Water
来源期刊	Journal of the Science of Food and Agriculture
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176353
作者单位	School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu, China; Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling, Shaanxi, China
推荐引用方式 GB/T 7714	Hou H.,Yang Y.,Han Z.,et al. Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China[J],2019,99(12).
APA	Hou H.,Yang Y.,Han Z.,Cai H.,&Li Z..(2019).Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China.Journal of the Science of Food and Agriculture,99(12).
MLA	Hou H.,et al."Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China".Journal of the Science of Food and Agriculture 99.12(2019).