干旱区生态环境知识资源中心(Arid): Soil water extraction and use by winter wheat cultivars under limited irrigation in a semi-arid environment

Arid

DOI	10.1016/j.jaridenv.2019.104046
	Soil water extraction and use by winter wheat cultivars under limited irrigation in a semi-arid environment
	Thapa, Sushil; Xue, Qingwu; Jessup, Kirk E.; Rudd, Jackie C.; Liu, Shuyu; Devkota, Ravindra N.; Baker, Jason A.
通讯作者	Xue, Qingwu
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2020
卷号	174
英文摘要	Water supply and distribution are the main limiting factors to wheat (Triticum aestivum) yield in a semi-arid region of the U.S. southern Great Plains. To manage crop water demand, limited irrigation (also called deficit irrigation) is commonly practiced in the region. A 4-yr study was conducted to evaluate yield in winter wheat cultivars as influenced by the depth and amount of net soil water extraction (SWE) under limited irrigation. For timing the irrigation application, we considered critical growth stages (jointing, tillering, and anthesis) as well as soil water depletion at the crop root zone below 50%. Volumetric soil water content was measured in 0.2 m increments to the depth of 2.4 m at planting, jointing, anthesis, and physiological maturity. Since the irrigation capacity was limited, seasonal precipitation was still an important factor for determining SWE. The 2011 season was one of the historic drought seasons with only 60 mm of seasonal precipitation and the net SWE in that season was limited to the upper 1.2 m profile. In contrast, the 2016 season was more favorable for crop growth with 315 mm of seasonal precipitation and the net SWE in that season reached to 2.0 m deep. Grain yield was largely influenced by the amount of net SWE during the growing season. For the wheat with grain yield of 4807 kg ha(-1), net SWE was 165 mm (2016). However, wheat with grain yield of 2933 kg ha(-1) only extracted 70 mm stored soil water (2011). The 2012 and 2017 seasons remained intermediate in terms of seasonal precipitation, SWE, and yield. Although the 2011 and 2016 seasons had similar stored soil moisture at planting, more early-season as well as total precipitation in 2016 appears to have enabled plant growth to access the deeper water. In contrast, a greater amount of stored soil water was left unused at the end of the 2011 season due to drought and poor plant growth. Hence, in addition to adding water at critical growth stages, ensuring early plant growth to promote root development for extracting soil water from the deeper profile later in the season should be a key strategy to take full advantage of limited irrigation.
英文关键词	Evapotranspiration Plant-available soil water Vapor pressure deficit Water use efficiency Wheat growth stages
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000508745900002
WOS关键词	USE EFFICIENCY ; ROOT-GROWTH ; DEFICIT IRRIGATION ; YIELD ; EVAPOTRANSPIRATION ; MANAGEMENT ; DROUGHT ; PRODUCTIVITY ; NITROGEN ; STRESS
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314876
作者单位	Texas A&M AgriLife Res & Extens Ctr, 6500 Amarillo Blvd W, Amarillo, TX 79106 USA
推荐引用方式 GB/T 7714	Thapa, Sushil,Xue, Qingwu,Jessup, Kirk E.,et al. Soil water extraction and use by winter wheat cultivars under limited irrigation in a semi-arid environment[J],2020,174.
APA	Thapa, Sushil.,Xue, Qingwu.,Jessup, Kirk E..,Rudd, Jackie C..,Liu, Shuyu.,...&Baker, Jason A..(2020).Soil water extraction and use by winter wheat cultivars under limited irrigation in a semi-arid environment.JOURNAL OF ARID ENVIRONMENTS,174.
MLA	Thapa, Sushil,et al."Soil water extraction and use by winter wheat cultivars under limited irrigation in a semi-arid environment".JOURNAL OF ARID ENVIRONMENTS 174(2020).