绵阳旱区玉米避旱栽培研究

Study on the drought escaping cultivation of corn in the dry area of Mianyang

通过对绵阳旱区近10a的降雨发生规律分析和玉米9个播种时间试验,结果表明:中熟玉米在4月25日至5月5日播种,可以在雨水较多的7月中旬抽雄开花,避开夏旱和伏旱的不利影响,提高双穗率、降低空秆率,增加穗粒数和百粒重,获得最高的产量。

The precipitation law of the last ten years was analyzed, and the sowing date trial of corn was carried out in the dry area of Mianyang,Sichuan Provice. The result showed that when the medium varieties of corn was sowed during April 25 to May 5, the ratio of towear plants was increased, the ratio of noear plants was decreased, and the grains per ear, the 100grain weight and the yield were increased because the crop could tassel in the second ten days of July when the precipitation was sufficient, and could escape drought in the tasseling and silking stage.