喷灌条件下冬小麦的水肥利用特征研究

Study on Consumption of Water and Fertilizer of Winter Wheat under Sprinkling Irrigation Condition

对喷灌条件下冬小麦对水肥的利用进行了研究,探讨了不同灌溉水量对冬小麦产量、耗水规律以及对土壤中硝态氮含量的影响,提出喷灌条件下冬小麦适宜的灌水定额。试验结果表明随着灌溉水量的增加,冬小麦消耗土壤水的份额逐渐减少,主要以消耗灌溉水为主;小麦生长期间对土壤中硝态氮的吸收随土壤深度的不同而有所区别;在3个灌溉水平下,随着灌水量的减少,灌溉水的利用效率逐渐升高,经济灌溉量为209.3 mm。

Water and fertilizer are two important factors that affect crop yield. Proper irrigation and fertilization is the main method to increase production. The paper presented the field study on the consumption of water and fertilizer of winter wheat under sprinkling irrigation condition. The different irrigation treatment that affects the yield of winter wheat, water consumption and the soil nitrogen was discussed and the optimal irrigation norm was presented. The results show that the amount of soil water used by winter wheat is decreasing with irrigation amount＇s increasing, so the water irrigated was used mostly. During the growing stage, the amounts of soil nitrogen absorbed by winter wheat were different in different soil depths. Under the three irrigation levels, the use efficiency of irrigation water increased with the decreasing of irrigation amount and the optimal irrigation norm is 209.3 mm.