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首页> 外文期刊>Agricultural Water Management >Yield, quality and crop water stress index relationships for deficit-irrigated soybean [Glycine max (L.) Merr.] in sub-humid climatic conditions.
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Yield, quality and crop water stress index relationships for deficit-irrigated soybean [Glycine max (L.) Merr.] in sub-humid climatic conditions.

机译：半湿润气候条件下亏缺灌溉大豆[Glycine max（L.）Merr。]的产量，品质和作物水分胁迫指数之间的关系。

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Field experiments were conducted for 2 years to evaluate the use of the crop water stress index (CWSI) for irrigation scheduling of soybeans under a sub-humid climate of Bursa, Turkey. Additionally, statistical relationships between CWSI and seed yield, quality parameters, crop evapotranspiration (ETc) and water use efficiency (WUE) were investigated. Irrigations were scheduled based on the replenishment of 100 (T100), 75 (T75), 50 (T50), 25 (T25), and 0% (T0) of soil water depletion from a soil depth of 90 cm using a 7-day irrigation interval. To compute CWSI, lower (nonstressed) and upper (stressed) baselines were developed based on the canopy temperature (Tc) measurements of fully irrigated and rain-fed treatments, respectively. According to results, CWSI could be used to determine the irrigation time of soybean for sub-humid climate and 0.22 could be offered as a threshold value. Statistically significant relationships were determined between CWSI and seed yield, protein yield, oil yield, ETc and WUE. The polynomial relationship between WUE and CWSI demonstrated that highest WUE could be obtained under CWSI close to 0.6. Consequently, an irrigation schedule that considers water stress could be employed when the cost of water is high and/or water is scarce. However, because of the yield reduction, all economic aspects of water limited irrigation scheduling should be considered before making this decision. We conclude that the CWSI could be used to evaluate crop water stress and improve irrigation scheduling for soybeans under sub-humid climatic conditions.
机译：进行了2年的田间试验，以评估作物水分胁迫指数（CWSI）在土耳其布尔萨半湿润气候下大豆灌溉计划中的使用。此外，还研究了CWSI与种子产量，质量参数，作物蒸散量（ET c ）和水分利用效率（WUE）之间的统计关系。根据补水量（T 100 ），75（T 75 ），50（T 50 ），25（T 25 ）和90天土壤深度（以7天灌溉间隔）的土壤水分消耗为0％（T 0 ）。为了计算CWSI，分别根据完全灌溉和雨养处理的冠层温度（T c ）测量得出了较低（无应力）和较高（应力）基线。根据结果​​，CWSI可以用于确定亚湿气候下大豆的灌溉时间，并且可以将0.22作为阈值。 CWSI与种子产量，蛋白质产量，油脂产量，ET c 和WUE之间具有统计学意义的关系。 WUE和CWSI之间的多项式关系表明，在CWSI接近0.6的情况下可以获得最高的WUE。因此，当水的成本高和/或水短缺时，可以采用考虑水压力的灌溉计划。但是，由于产量下降，在做出此决定之前应考虑水限制灌溉计划的所有经济方面。我们得出的结论是，CWSI可用于评估作物水分胁迫并改善半湿润气候条件下大豆的灌溉进度。

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