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以丹玉12为材料,研究辽西半干旱区控制灌溉条件下种植密度对玉米生长发育和耗水量的影响。结果表明,种植密度对株高影响不大,茎粗和单株叶面积随种植密度的增加而减小,叶面积指数、日耗水量、阶段耗水量和全生育期耗水量均随着种植密度的增加而增大,全生育期高密度处理玉米总耗水量高出低密度处理22%;玉米产量和水分利用效率均随种植密度的增加先增大后减小。综合考虑节水和增粮目的,在辽西半干旱地区控制灌溉条件下,丹玉12种植适宜密度为5.25万株/hm2。
Taking Dan-yu 12 as material, the effects of planting densities on the growth and water consumption of maize under controlled irrigation in semi-arid regions of western Liaoning were studied. The results showed that plant density had little effect on plant height, and the stem diameter and plant leaf area decreased with the increase of plant density. The leaf area index, daily water consumption, phase water consumption and water consumption during the whole growth period varied with planting density , And the total water consumption of high-density treatment of corn during the whole growth period was 22% higher than that of low-density treatment. The yield and water use efficiency of corn increased firstly and then decreased with the increase of planting density. Considering the purpose of saving water and increasing grain, under the condition of controlled irrigation in semi-arid areas in western Liaoning, the appropriate density of Dan-yu 12 planting is 52,500 plants / hm2.