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为了探索水稻直播的最佳种植工艺及其相应的机械化生产 ,采用田间试验方法 ,在辽阳市景尔屯村的 2 0 hm2水田进行了乳芽直播、常规插秧和抛秧 3个处理的水稻种植对比试验。对培育期乳芽的根长、根数和高度等生长特征的研究结果表明 ,练苗环节对根长和乳芽高度的增长速度有明显的抑制作用 ,但对乳芽根数的增加无影响。对秧苗生长中期的性状特征研究结果表明 ,与其它 2个处理相比 ,乳芽直播的秧苗在 5月 2 0～ 7月 2 7日期间生长较快 ,分蘖和抽穗开始时间早 ,分蘖节位低 ,但由于播种密度太大 ,有效分蘖率较低。对 3个处理的产量形成指标检测结果表明 ,乳芽直播处理的穗数密度为5 38.7万穗 /hm2 ,每穗结实粒数为 76 .8粒 ,千粒重为 0 .0 2 46 kg
In order to explore the best planting technology of direct seeding rice and its corresponding mechanized production, field experiments were carried out to study the effects of direct seeding buds, conventional planting and throwing seedlings on the 20 hm2 paddy field in Jingerrtun Village, Liaoyang City. Comparative Test. The results of the study on growth characteristics such as root length, root number and height of cultivated buds showed that the part of seedling cultivation had a significant inhibitory effect on the growth of root length and bud height, but had no effect on the increase of the number of buds . The results of seedling traits in mid-growth stage showed that compared with the other two treatments, the direct seeding seedlings grew faster during the period from May 20 to July 27, with earlier tillering and heading stages, tillering nodes Low, but due to sowing density is too high, the effective tiller rate is low. The results of the index of yield formation of the three treatments showed that the spikelets density of direct seeding treatment was 538700 spikes / hm2, the number of grains per spike was 76.8 and the grain weight was 0.2246 kg