松嫩平原喷灌小麦的喷灌次数、水量和土壤湿度对产量的影响

本文主要论述了以肇州县为代表的松嫩平原地区,喷灌小麦的产量与喷灌次数和水量有关,在土壤水分不超过田间持水量的前提下,喷灌次数越多,产量越高。在未喷灌地块小麦产量越低,喷灌的增产幅度越大。在土壤入渗速度和允许喷灌强度协调的情况下,每次喷水量越大,则产量越高。从土壤湿度上看,大于田间持水量80％的天数占全生育期总天数大于80％时,小麦可创高产,总天数小50％时,小麦将造成严重减产。

THE DEGREES OF EFFECT ON THE OUTPUT OF SPRINKLING IRRIGATION WHEAT ON THE SONG-NEN PLAIN

The relationship between the output of sprinkling irrigation wheat on the Song-Nen Plain and times of sprinkling irrigation and moisture content as well embodied in Zhao Zhou is illustrated. Under the condition of the soil moisture doesn't go beyond the field capacity, the more times of sprinkling irrigation has, the higher output it can bring. In the unsprinkling irrigation fields, the lower of the wheat output is, the larger increasing range of sprinkling irrigation is. If the soil permeable speed and allowable sprinkling irrigation strength can coordinate each other, every time the more spraying water is, the higher the output is. From the view of the soil moisture, if the days which are more than 80% field capacity can occupy the general days of 80% during the whole growth period, wheat can bring about high output; otherwise, if it is less than 50% reduction of output will be done severely to wheat.