新疆北部干旱区春小麦需水量与灌溉制度试验研究

Water Consumption Characteristics and Irrigation Scheduling for Spring Wheat in Arid Environment of Northern Xinjiang

通过对春小麦的灌水量、灌水时间、灌水次数等方面的试验对比分析,得出春小麦的耗水规律。同时揭示了春小麦产量与灌水量的关系,产量与灌水量之间的关系曲线呈抛物线形式,灌水量在较小值时,产量随着灌水量的增加而增加,直至到达产量最大值,此后随着灌水量的増加产量反而开始下降。结合试验成果和当地荒漠戈壁地的土质结构和性状,提出了当地种植春小麦的灌溉制度,春小麦灌溉定额为4 553.9m3/hm2,全生育期的灌水次数为10次。

Based on the experimental contrast analysis ol the irrigation amount, time, umes anu omer aspects of spring wheat,the water consumption law of spring wheat water is summarized in this paper. Also the relationship between water consumption and production of spring wheat is revealed. The relation curve between yield and water demand of spring wheat is parabolic form. When the water demand is in the smaller value, the production increases with the increase of water demand until reaches the maximum yield. Then the production begins to decline with the increase of water demand. Combined with the experimental results and the local desert soil structure and properties, an irrigation scheduling for local spring wheat is put forward, in which the irrigation quota for spring wheat is 4 553.9 m3/hm2 and the irrigation times in whole growth period is 10 times.