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晚粳品种采用秧苗带土移栽,密播与壮秧的矛盾十分突出,普遍反映密播后秧苗素质较差,成熟期延迟,影响产量提高。当前生产上一般以降低播种量的办法,来培育壮秧,但带来专用秧田面积大,插秧工效低等矛盾。为此,我们在1972年进行初步试验。在适当增加播种量的情况下,采用肥水促进和化学药剂抑制相结合的措施,调节株型,增高叶片含氮量,培育出了素质较好的秧苗。现将试验结果总结如下:
Late Japonica varieties with seedlings with soil transplanting, the contradiction between dense sowing and strong seedling is very prominent, generally reflects the poor quality of seedlings after sowing, delayed maturity, affecting the yield increase. The current production generally reduce the amount of seeding approach to cultivate strong seedlings, but to bring a large area for special seedling, transplanting efficiency and other contradictions. For this reason, we conducted a preliminary test in 1972. In the case of appropriate increase of seeding rate, fertilizer and water to promote the combination of chemical suppression measures to adjust the plant type, increase leaf nitrogen content, breed better quality seedlings. Now the test results are summarized as follows: