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- Title
Effects of growth‐stage‐based limited irrigation management on the growth, yields, and radiation utilization efficiency of winter wheat in northwest China.
- Authors
Cao, Yuxin; Cai, Huanjie; Sun, Shikun
- Abstract
BACKGROUND: As a common abiotic stress, water deficit stress has a negative impact on the growth and yield of many field crops worldwide. In this study, a mobile rain shelter experiment was conducted in the 2017–2019 growing seasons to investigate the effects of water stress at different growth stages on various traits in winter wheat, including plant height, leaf area index (LAI), biomass, radiation use efficiency (RUE), leaf photosynthetic traits, and yield. RESULTS: Three different limited irrigation treatments were applied: no irrigation at all stages (T0), no irrigation at the reviving and jointing stages (T1), and no irrigation at the heading and grain‐filling stages (T2). In all treatments, 2‐year averages showed that T1 resulted in the highest grain yield (6470 kg ha−1). The plant height and LAI of winter wheat increased in the order of T0 < T1 < T2. In addition, T1 increased post‐anthesis biomass. The net photosynthetic rate and RUE were significantly higher in T1 than in other treatments. T1 could improve leaf photosynthetic traits by increasing Gs, Fv/Fm, ΦPSII, and qP, thus increasing RUE and grain yield. CONCLUSION: We propose that irrigation at the heading and grain‐filling stages was the optimal limited irrigation practice for efficient radiation use and high yields in winter wheat in the arid and semi‐arid area of northwest China. © 2021 Society of Chemical Industry
- Subjects
CHINA; IRRIGATION management; SOCIETY of Chemical Industry (Great Britain); CROP yields; WINTER wheat; LEAF area index; GRAIN yields; PHOTOSYNTHETIC rates
- Publication
Journal of the Science of Food & Agriculture, 2021, Vol 101, Issue 14, p5819
- ISSN
0022-5142
- Publication type
Article
- DOI
10.1002/jsfa.11233