Arid
DOI10.1016/j.agwat.2016.04.004
Optimising supplemental irrigation for wheat (Triticum aestivum L.) and the impact of plant bio-regulators in a semi-arid region of Deccan Plateau in India
Wakchaure, G. C.; Minhas, P. S.; Ratnakumar, P.; Choudhary, R. L.
通讯作者Wakchaure, G. C.
来源期刊AGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
EISSN1873-2283
出版年2016
卷号172页码:9-17
英文摘要

Understanding the effects of water stress on yield formation is essential for planning irrigation and other mitigation strategies in arid and semiarid regions. Therefore, a field experiment was conducted for 3 years to evaluate the impact of irrigation regimes and plant bio-regulators (PBR’s) on grain yield and water productivity of spring wheat (Triticum aeastivum L). PBR’s applied through exogenous sprays included: 10mM thiourea (TU), 10 mu M salicylic acid (SA), 15 g L-1 potassium nitrate (KNO3), 25 ppm gibberellic acid (GA(3)), 8 ppm ortho-silicic acid (OSA) at crown root initiation (CRI), flag leaf and seed milking stages and control (no PBR). Seven irrigation levels were generated through a line source sprinkler system (LSS) viz., application of irrigation water (IW) equalling 1.0, 0.85, 0.70, 0.55, 0.40, 0.25 and 0.10 times the CPE (cumulative open pan evaporation). The maximum yield obtained with PBR’s varied between 4.11-4.46 Mg ha(-1) at IW:CPE 0.85 against 4.09 Mg ha(-1) without PBR. While the yield decline equalled 0.35-0.42 Mg ha(-1) for every 0.1 IW:CPE for PBR’s against 0.43 Mg ha(-1) without PBR. The overall improvement in grain yield and total biomass with PBR’s ranged between 5.9-20.6% and 4.8-15.3%, respectively. Specifically TU and SA showed a major role under medium (IW:CPE 0.40-0.69) and severe (0.10-0.39) stress conditions in terms of maintenance of leaf water content, modulating the stomatal opening and better water usage and thereby improved yield by 0.41-0.88 Mg ha(-1). The maximum water productivity ranged between 1.20-1.35 kg m(-3) with different PBR’s while it was 1.18 kg m(-3) without PBR and the latter could be achieved with 19-56% lesser irrigation water with PBR’s. Overall conclusions are that the effects of deficit irrigation could be substantially enhanced in terms of grain yield and water productivity when used conjunctively with PBR’s like TU and SA. Thus for integrating PBR’s with supplemental irrigation, large scale testing is required for defining their economic spray schedules under water scarcity conditions. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Supplemental irrigation Plant bio-regulators Line source sprinkler (LSS) Water productivity Water deficits
类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000377740100002
WOS关键词LINE-SOURCE SPRINKLER ; WATER-PRODUCTION-FUNCTIONS ; SALICYLIC-ACID ; SALINITY TOLERANCE ; FOLIAR APPLICATION ; USE EFFICIENCY ; WINTER-WHEAT ; HEAT-STRESS ; GRAIN-YIELD ; SILICON
WOS类目Agronomy ; Water Resources
WOS研究方向Agriculture ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/191124
作者单位ICAR Natl Inst Abiot Stress Management, Pune 413115, Maharashtra, India
推荐引用方式
GB/T 7714
Wakchaure, G. C.,Minhas, P. S.,Ratnakumar, P.,et al. Optimising supplemental irrigation for wheat (Triticum aestivum L.) and the impact of plant bio-regulators in a semi-arid region of Deccan Plateau in India[J],2016,172:9-17.
APA Wakchaure, G. C.,Minhas, P. S.,Ratnakumar, P.,&Choudhary, R. L..(2016).Optimising supplemental irrigation for wheat (Triticum aestivum L.) and the impact of plant bio-regulators in a semi-arid region of Deccan Plateau in India.AGRICULTURAL WATER MANAGEMENT,172,9-17.
MLA Wakchaure, G. C.,et al."Optimising supplemental irrigation for wheat (Triticum aestivum L.) and the impact of plant bio-regulators in a semi-arid region of Deccan Plateau in India".AGRICULTURAL WATER MANAGEMENT 172(2016):9-17.
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