对大、小麦进行冬季灌溉,能使麦苗在越冬期间有适宜的水分供应,巩固冬前形成的健壮分蘖;因水的比热较大,能平抑地温急剧变化,防止麦苗冬季受冻。同时,麦田冬灌还能达到冬水春用、预防早春干旱的目的。因此,大、小麦在冬季适当灌水能表现显著的增产作用。其增产幅度一般在10～30％之间,春早年份增产效果尤为显著。 Winter irrigation of large wheat and wheat can make wheat seedlings have suitable moisture supply during winter and consolidate the strong tillers formed in winter. Because of the large specific heat of water, the rapid temperature change can be suppressed and winter wheat frost is prevented from freezing. At the same time, wheat field winter irrigation can achieve winter water spring use, to prevent the purpose of early spring drought. Therefore, large and wheat irrigation in winter can show significant increase in yield. The rate of increase is generally between 10 ~ 30%, spring early years yield is particularly significant.