晚育晚插节水栽培对北方粳型超级稻产量和穗部性状的影响

通过分期播种和分期插秧试验研究晚育晚插节水栽培对北方粳型超级稻产量和穗部性状的影响。结果表明:在沈阳地区,沈农602晚播的最适期是5月上旬,插秧期在6月中上旬,可以取得9 000 kg/hm2以上的产量;而适期播种的秧苗,晚插最迟不应晚于6月10日;如想获得7 500 kg/hm2的产量,晚播不能迟于5月20日,插秧期在6月中上旬,而适期播种的秧苗,晚插的最后期限是在6月20日之前完成插秧,过晚不能完全成熟,结实率低,充实度差。

Effect of late-sowing and late-transplanting on yield and panicle traits of super japonica rice in northern China

The effect of water-saving culture of late-sowing and late-transplanting on grain yield and panicle traits of super japonica rice in northern China was studied with different sowing and transplanting stage treatments.The results showed that the most suitable latesowing stage and late-transplanting stage of Shennong602 were the first ten-days of May and the middle to the last ten-days of June,respectively,under which the grain yield was over 9 000 kg/hm~2;As for the seedlings sowed at suitable stage,the inferior limit of latetransplanting stage was June 10;In order to get the yield of more than 7 500 kg/hm~2,the inferior limit of the late-sowing was May 20,and the transplanting stage was the first and the middle ten-days of June.When the sowing and transplanting stage was too late,the grains could not fully ripe,the seed-setting rate was decreased,and the grain filling rate was lowered.