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随着直播稻生产上的立苗、草害、倒伏关基本解决后,生产中又出现了用种量多、基本苗高等问题,到收获时虽能取得较多的穗数,但穗形小,产量并不理想。为此,近几年我们对穗粒兼顾型晚粳品种“8604”、“太湖糯”和穗数型中粳品种“8639”单季直播稻进行了不同密度对穗部性状影响试验,并进行了大面积多点调查。通过试验、调查,进一步明确了适当减少基本苗是争足穗、大穗,提高单产的一个主要途径。
With the direct seedlings of rice production on the lawn, grass damage, lodging the basic solution to the problem, the production has emerged with the amount of seedlings, the basic seedlings and other issues, although the harvest can get more spikes, but the spike , The output is not ideal. For this reason, in recent years, we conducted experiments on the effects of different densities on the panicle traits of single-season direct seeding rice of the late japonica rice variety “8604”, “Taihu waxy” and the panicle type “8639” A large area multi-point investigation. Through experiments and surveys, it has been further clarified that proper reduction of basic seedlings is a major way to fight spikes, big spikes and increase yields.