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本文分析了我国北方稻区的缺水情况,在试验的基础上提出采用上开式宽床旱育苗喷灌,每亩喷灌水量43米~3,比地面灌溉省水78.9%,并培育出优质壮秧。水稻移栽后,作者在总结国内外节水灌溉经验的基础上,采用坑测法试验在缺水情况下,对分蘖期实行阶段的“不充足灌溉”,获得移栽后连续断水28天的水稻生育和用水量的资料。断水处理实脱产量872斤/亩,比对照减产36.9%,但亩用水量减少了41.0%,水的生产效率2.73斤/亩,高于正常灌溉水平。试验结果揭示了水分管理与产量之间一定的规律性,指明了节水灌溉增产的途径。
This paper analyzes the water deficit in the rice planting area in northern China. Based on the experiment, the paper puts forward the method of sprinkling irrigation water on open wide bed in nursery. The spraying water per acre is 43m ~ 3, 78.9% seedling. After transplanting rice, on the basis of summing up the experience of domestic and international water-saving irrigation, the author uses the pit test to test the “inadequate irrigation” in the stage of tillering stage under the condition of water shortage and obtain the continuous water cut after transplanting for 28 days Information on rice growth and water use. However, the water cutoff was 872 kg / mu, 36.9% less than that of the control, but the water use per mu decreased by 41.0%. The water production efficiency was 2.73 kg / mu, which was higher than the normal irrigation level. The test results revealed a certain regularity between water management and yield, and indicated the ways to increase production of water-saving irrigation.