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不同干旱过程对半干旱雨养农业区春小麦生长及产量的影响
Effects of different drought processes on the growth and yield of spring wheat in a semiarid rain-fed agricultural region
【摘要】 为探究干旱胁迫对黄土高原半干旱雨养农业区春小麦关键生育期生长参数及产量形成的影响,本研究进行了降雨操纵田间试验,在2021年春小麦主要生育期,我们利用防雨棚完全排除不同生长阶段(拔节期至抽穗期、拔节期至开花期、拔节早期至开花期)的降雨,以造成干旱胁迫,并以雨养处理作为对照进行分析.结果显示:干旱持续发生会导致春小麦的株高、叶面积指数、地上部生物量及产量下降,且干旱发生越早,胁迫影响越严重.然而,叶片叶绿素含量在避雨处理期间与雨养处理无明显差异,反映了春小麦在应对干旱胁迫下的生长和发育策略.该研究可为黄土高原旱作雨养农业区制定有效的农作物管理策略和应对气候变化的措施提供科学依据.
【Abstract】 In order to explore the effects of drought stress on the growth parameters and yield formation of spring wheat during the key growth stage in the semiarid rain-fed agriculture area on the Loess Plateau, a rainfall manipulation field experiment was conducted in 2021. Rainfall was completely excluded at different growth stages(jointing to heading stage, jointing to flowering stage, and early jointing to booting stage) using rain shelters to create drought stress, with rain-fed treatment as the control. The results showed that prolonged drought stress led to a decrease in plant height, leaf area index, aboveground biomass, and yield of spring wheat, and the earlier the drought occurred, the more severe the stress effect. However, there was no significant difference in leaf chlorophyll content between the rain-sheltered treatment and the rain-fed treatment, indicating the growth and development strategies of spring wheat in response to drought stress. This study can provide reference for the formulation of effective crop management strategies and measures to cope with climate change in the rain-fed areas on the Loess Plateau.
【Key words】 spring wheat; rainfall; drought stress; dry matter accumulation; crop yield; semiarid rain-fed agricultural region;
- 【文献出处】 青海师范大学学报(自然科学版) ,Journal of Qinghai Normal University(Natural Science Edition) , 编辑部邮箱 ,2025年01期
- 【分类号】S512.12
- 【下载频次】12