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本文主要研究在喷灌条件下,冬小麦田间水分管理理论和技术。通过田间试验和建立有作物根系吸水的土壤水分运动数学模型,探索冬小麦节水高产的机理和优化的灌溉模式。研究成果表明:在当前“昌平县南邵节水型示范区”条件下,冬小麦保持350kg/亩以上产量水平时,耗水大约350mm,灌水量220～280mm,总水效1kg/mm左右。喷灌定额在60mm时,消耗于上面蒸发及深层渗漏的无效水分最少,根系层平均土壤含水量最均匀适量,有利于冬小麦生长发育。从而拟定出当地6—4—6节水本产优化的喷灌模式。
This paper mainly studies the theory and technology of winter wheat field moisture management under the condition of sprinkling irrigation. Through field experiments and establishment of a mathematical model of soil water movement with water uptake by crop roots, the mechanism of water-saving and high-yield winter wheat irrigation and the optimized irrigation mode were explored. The results show that under the condition of “Nanping-Shao-Nan-Shao Water-Saving Demonstration Zone”, the water consumption is about 350mm, irrigation amount is 220-280mm, and the total water efficiency is about 1kg / mm when the winter wheat output is above 350kg / mu. Sprinkler irrigation quota at 60mm, the evaporation of waste and deep seepage on the ineffective water at least the root mean even layer soil moisture content is the most appropriate, is conducive to the growth and development of winter wheat. To develop a local 6-4-6 water-saving optimization of the sprinkling irrigation mode.