000			03453nab a22003857a 4500
999			_c62097 _d62089
001			62097
003			MX-TxCIM
005			20211006072304.0
008			200602s2020 xxu|||p|op||| 00| 0 eng d
022			_a0140-1963
024	8		_ahttps://doi.org/10.1016/j.jaridenv.2019.104046
040			_aMX-TxCIM
041			_aeng
100	1		_914044 _aThapa, S.
245	1	0	_aSoil water extraction and use by winter wheat cultivars under limited irrigation in a semi-arid environment
260			_aUSA : _bElsevier, _c2020.
500			_aPeer review
520			_aWater 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.
546			_aText in English
650		7	_2AGROVOC _911763 _aEvapotranspiration
650		7	_2AGROVOC _92515 _aSoil water
650		7	_2AGROVOC _914045 _aWater availability
650		7	_2AGROVOC _910781 _aVapour pressure
650		7	_2AGROVOC _91307 _aWater use efficiency
650		7	_aWheat _gAGROVOC _2 _91310
650		7	_2AGROVOC _95197 _aPlant developmental stages
700	0		_98661 _aQingwu Xue
700	1		_914046 _aJessup, K.E.
700	1		_98660 _aRudd, J.C.
700	0		_98664 _aShuyu Liu
700	1		_914047 _aDevkota, R.N.
700	1		_914048 _aBaker, J.A.
773	0		_dUSA : Elsevier, 2020. _gv. 174, art. 104046 _tJournal of Arid Environments _x0140-1963 _w72628
942			_2ddc _cJA _n0