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推广杂交早稻是提高单产的一个重要措施,但目前选用的早熟组合。如威优49、威代64等一般全生育期都较长,对后茬作物生长不利,在一定程度上影响了杂交早稻面积的扩大。安徽省潜山县余井区农技站为改变这种状况,1987学在杂交早稻威16抽穗前4天亩喷施“930”1克,浓度为20ppm,获得了提早5天成熟的效果(全生育期116天,对照为121天);在抽穗20％时亩喷施“920”
The promotion of hybrid early rice is an important measure to improve yield, but the current selection of precocious combinations. For example, Weiyou 49 and WeiDai 64 all have longer growth periods and adversely affect the growth of the following crop plants, thus affecting the expansion of the area for early rice hybrids to a certain extent. In order to change this situation, in 1987, we studied the effect of ripening five days earlier by spraying 1 gram of “930” at a concentration of 20ppm in the first 4 days of hybrid early rice Weijia 16 The whole growth period of 116 days, the control was 121 days); 20% of heading in the spray spray “920”