不同灌水量对南疆棉花墒情及长势的影响研究

通过棉花膜下滴灌大田试验,研究了不同灌水量情况下作物长势与产量影响及土壤墒情变化与分布规律的影响。试验共设了3 300、3 000、2 700、2 400m3/hm2等不同灌溉定额的处理,在各处理试验小区内装土壤墒情传感,并其传感器探头埋在地下10、20、40cm处实时监测不同层面土壤含水量和温度变化,以及同时在相应处取土样采用烘干法测土壤含水率和田间持水量。结果表明:3 300、3 000m3/hm2灌溉定额下,作物长势、土壤含水率和温度变化规律比较好,并与产量的相关性显著最佳状态,灌溉定额对土壤水分与温度灌水前后和灌水周期内变化的影响有明显显著。

Effects of Different Irrigation Water Quantity on Soil Moisture and Growth of Cotton in South Xinjiang

Through cotton mulched drip irrigation field experiment ,the effects of different irrigation conditions on crop yield and soil moisture change and distribution are studied .The experiment set up 4 treatments with different irrigation quota as 3 300 ,3 000 , 2 700 and 2 400 m3/hm2 ,and soil moisture sensor is installed in all the experiment plot .The sensor probes are buried underground 10 ,20 ,40 cm to real-time monitor soil water content and temperature change of different levels ,and at the same time ,drying meth‐od is used to measure soil moisture content and field capacity of the corresponding sampling .The results show that :under the condi‐tion of 3 300 and 3 000 m3/hm2 irrigation quota ,the variation of crop ,soil moisture and temperature is better and significantly asso‐ciated with the yield ;irrigation quota has obviously influence on soil moisture and temperature before and after irrigation and their change during irrigation cycle .