杂交中稻分蘖期干旱对产量的影响及其缓解技术研究

发布时间：2018-05-03 00:32

本文选题：杂交中稻 + 分蘖期　；参考：《中国稻米》2017年06期

【摘要】：以杂交中籼迟熟组合宜香优300和川谷优642为材料,在海南陵水旱季大田条件下,研究了分蘖期干旱处理对中籼迟熟杂交稻产量的影响及其缓解技术。结果表明,干旱会造成水稻减产,主要原因是有效穗数和穗粒数显著降低;干旱期间平均田间持水量可作为预测产量损失度的依据;分蘖期干旱处理下,稻谷产量随着施氮量和移栽密度的增加而增加,适当提高本田施氮水平和移栽密度,可显著降低分蘖期干旱的产量损失度。
[Abstract]:The effects of drought treatment at tillering stage on yield of medium indica late maturing hybrid rice Yixiangyou 300 and Chuangyou 642 in Lingshui dry season Hainan were studied in this paper. The results showed that drought could reduce the yield of rice, the main reason was that the number of effective panicles and the number of grains per panicle were significantly decreased, the average field water holding capacity could be used as the basis for predicting the degree of yield loss during drought, and under drought treatment at tillering stage, The yield of rice increased with the increase of nitrogen application amount and transplanting density. Increasing the nitrogen application level and transplanting density of Honda could significantly reduce the yield loss degree of drought at tillering stage.
【作者单位】：四川省农业科学院水稻高粱研究所/农业部西南水稻生物学与遗传育种重点实验室;国家水稻改良中心四川泸州分中心;
【基金】：基金项目:国家水稻产业体系(CARS-01-29) 粮食科技丰产工程(2011BAD16BO5-1)
【分类号】：S423;S511.32

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