滴灌频率对南疆棉田水分蒸散特征及WUE的影响

The Impact of Irrigation Frequency on the Characters of Evapotranspiration and WUE Which Use Plastic Film under Drip Irrigation in Southern Xinjiang

【目的】明确不同灌溉频率对南疆滴灌棉田耗水特征及水分利用效率的影响。【方法】在田间设置5个灌水频率(3、6、9、12和15 d/次),研究根区水分调节对南疆滴灌棉田蒸散量(耗水量)、蒸散组分、产量、WUE的影响。【结果】增加灌溉频率能降低苗蕾期的无效耗水比例和花铃期蒸散量,植株生长正常,产量、WUE等均增加。【结论】高频灌溉能降低无效耗水,提升WUE,增产效果显著。

【Objective】In order to understand the influence of different irrigation frequency effect on water use efficiency. 【Method】We selected Xinluzao NO. 47 as the test material and set five irrigation frequency（ 3 d /time; 6 d /times; 9 d /times; 12 d /times; 15 d /times; PC6 is CK for the production of irrigation frequency）,studied evapotranspiration（ water consumption） of cotton,evapotranspiration components,yield components,WUE process of change. 【Result】High frequency promoted the low water demand and as the side low frequency is opposite result;（ 3） Seedling and bud stage is dominated period for soil evaporation.when planting should take appropriate measures to minimize the ratio of E/ET,reduce ineffective consumption,promote efficient consumption of transformation. 【Conclusion】In the production we suggest that use possibly measures to increase the number of irrigation frequency during reproductive growth stage in order to reduce irrigation interval and obtain higher WUE.