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首页> 外文期刊>Turkish Journal of Agriculture & Forestry >Use of a Crop Water Stress Index for Scheduling the Irrigation of Sunflower (Helianthus annuus L.)
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Use of a Crop Water Stress Index for Scheduling the Irrigation of Sunflower (Helianthus annuus L.)

机译：作物水分胁迫指数用于安排向日葵（Helianthus annuus L.）的灌溉

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摘要

This study was designed to evaluate different threshold crop water stress index (CWSI) values to schedule irrigation for sunflower (Helianthus annuus L.) grown under furrow irrigation. Irrigations were started when CWSI values reached 0.2, 0.4, 0.6, 0.8 and 1.0 (non-irrigation). The CWSI values were computed from measurements of canopy temperature, air temperature and atmospheric vapor pressure deficit. Total irrigation water amounts of 679, 584, 470 and 227 mm were applied to the T0.2, T0.4, T0.6 and T0.8 treatments, respectively. The maximum seasonal evapotranspiration (ET), 809 mm was measured from the T0.2 treatment. Irrigation levels significantly affected seed yield. Although the highest seed yield (4.38 t ha-1) was obtained from the T0.2 treatment, the T0.4 and T0.6 treatments were not significantly different from the T0.2 treatment. Therefore, based on these results, a CWSI value of 0.6 can be used for the irrigation time of sunflower under Tekirda? conditions
机译：这项研究旨在评估不同的阈值作物水分胁迫指数（CWSI）值，以安排在沟灌条件下种植的向日葵（Helianthus annuus L.）的灌溉时间。当CWSI值达到0.2、0.4、0.6、0.8和1.0时开始灌溉（非灌溉）。 CWSI值是根据冠层温度，空气温度和大气蒸气压不足的测量值计算得出的。 T0.2，T0.4，T0.6和T0.8处理的总灌溉水量分别为679、584、470和227 mm。从T0.2处理中测得最大季节性蒸腾量（ET）为809毫米。灌溉水平显着影响种子产量。尽管从T0.2处理获得了最高的种子产量（4.38 t ha-1），但是T0.4和T0.6处理与T0.2处理没有显着差异。因此，基于这些结果，在Tekirda®条件下向日葵的灌溉时间可以使用CWSI值为0.6。条件

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