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为了明确寒地水稻在直播栽培条件下的出苗特性及产量表现,采取盆栽和田间试验相结合,研究粳稻品种、播期、播量对出苗及产量的影响。试验结果表明,旱直播18个供试品种平均出苗率76.7%,表现较好的有龙粳21号、龙粳20号、龙粳26号、龙粳40号、龙粳25号等5个品种。随播期推迟、播量增加,每穗粒数、千粒重减少。以5月11日播种,播量110kg/hm2,产量最佳为7 789kg/hm2。采用旱种水管栽培平均产量7 716.9kg/hm2。
In order to clarify the seedling emergence characteristics and yield performance of rice in direct seeding cultivation in cold region, pot experiments and field experiments were conducted to study the effects of japonica rice varieties, sowing dates and seeding rates on emergence and yield. The results showed that the average germination rate of 18 tested cultivars in direct seeding was 76.7%, which were 5 varieties of Longjing 21, Longjing 20, Longjing 26, Longjing 40 and Longjing 25 . Postponed with the sowing date, sowing increased, grains per spike, 1000-grain weight reduction. May 11 planting, sowing 110kg / hm2, the best yield of 7 789kg / hm2. The average yield of dry cultivation pipe is 7 716.9kg / hm2.