Arid
DOI10.1016/j.agwat.2015.10.010
Drought response and yield formation of spring safflower under different water regimes in the semiarid Southern High Plains
Singh, Sukhbir1; Angadi, Sangamesh V.1; Grover, Kulbhushan1; Begna, Sultan1; Auld, Dick2
通讯作者Angadi, Sangamesh V.
来源期刊AGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
EISSN1873-2283
出版年2016
卷号163页码:354-362
英文摘要

Safflower (Carthamus tinctorius L.) is a deep rooted drought tolerant crop that originated in desert environments of the Middle East, and could be very well adapted to the semi-arid Southern High Plains. A field experiment was conducted at Clovis, New Mexico during 2012 and 2013 seasons to assess drought physiology and yield formation of two diverse spring safflower cultivars under different irrigation levels with or without preseason irrigation. One half of the experimental blocks received preseason irrigation of 164 mm in 2012 and 153 mm in 2013 to refill the soil profile utilized by the previous crops, while the other half remained depleted. Five in-season irrigation levels (I-1-I-5) ranging from 88 to 392 mm in 2012 and from 83 to 373 mm in 2013 were imposed on both preseason irrigation and no-preseason irrigation blocks. Higher leaf water potential (psi(I)) was observed under increased water availability either by preseason irrigation or by higher in-season irrigation level in safflower during two observation dates in both years. Osmotic potential at full turgor (psi(pi 100)), photosynthesis rate (P-n) and transpiration rate (T-r) decreased with a reduction in psi(I) under water stress conditions. The relative water content (RWC) was affected only by the in-season irrigation levels in both years. The preseason irrigation increased seed yield of safflower by 39 and 118% over no-preseason irrigation in 2012 and 2013, respectively. A gradual increase in seed yield was observed with an increase in irrigation levels; and the highest irrigation level, I-5 increased seed yield by 85 and 171% over the lowest irrigation level, I-1 in 2012 and 2013, respectively. Seed yield increased with increase in P-n, plant biomass, number of heads per plant, and number of seeds per head but not with 1000-seed weight under increased water availability. Overall, increased availability of water through preseason irrigation or through in-season irrigation levels improved safflower physiology and yield formation. (C) 2015 Elsevier B.V. All rights reserved.


英文关键词Spring safflower Preseason irrigation Irrigation levels Drought physiology Yield formation
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000365376400034
WOS关键词OSMOTIC ADJUSTMENT ; PLANT-RESPONSES ; WHOLE-PLANT ; PHOTOSYNTHESIS ; STRESS ; DEFICIT ; COMPONENTS ; IRRIGATION ; SUNFLOWER ; OSMOREGULATION
WOS类目Agronomy ; Water Resources
WOS研究方向Agriculture ; Water Resources
来源机构New Mexico State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/191098
作者单位1.New Mexico State Univ, Las Cruces, NM 88003 USA;
2.Texas Tech Univ, Lubbock, TX 79409 USA
推荐引用方式
GB/T 7714
Singh, Sukhbir,Angadi, Sangamesh V.,Grover, Kulbhushan,et al. Drought response and yield formation of spring safflower under different water regimes in the semiarid Southern High Plains[J]. New Mexico State University,2016,163:354-362.
APA Singh, Sukhbir,Angadi, Sangamesh V.,Grover, Kulbhushan,Begna, Sultan,&Auld, Dick.(2016).Drought response and yield formation of spring safflower under different water regimes in the semiarid Southern High Plains.AGRICULTURAL WATER MANAGEMENT,163,354-362.
MLA Singh, Sukhbir,et al."Drought response and yield formation of spring safflower under different water regimes in the semiarid Southern High Plains".AGRICULTURAL WATER MANAGEMENT 163(2016):354-362.
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