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[目的]寻求最适宜的杂交籼稻协优084播期和栽插密度。[方法]在大田小区试验中,设4个播期:5月1日5、月11日5、月21日、5月31日,设5个密度:12万、18万2、4万3、0万和36万穴/hm2,研究不同的播期和栽插密度对协优084主要农艺性状及产量的影响。[结果]随栽插密度的增加,协优084的基本苗、最高苗和有效穗呈上升趋势。协优084随栽插播期的推迟,其穗长呈下降趋势,每穗总粒数、每穗实粒数、结实率、单位面积的总颖花量和产量呈先增加后降低的趋势;随栽插密度的增加,其结实率、千粒重变化不明显,穗长、每穗总粒数和每穗实粒数呈下降趋势。[结论]协优084在长江中下游地区的适宜播期为5月上中旬,中上等肥力水平下的适宜栽插密度为30万穴/hm2。
[Objective] The study aimed to find the most suitable indica hybrid rice Xieyou 084 sowing date and transplanting density. [Method] In the field plot experiment, four sowing dates were set as follows: May 1, May 5, May 11, May 21 and May 31, five densities: 120,000, 180,000, 24,000, , 0 million and 360,000 points / hm2. The effects of different sowing dates and planting density on the main agronomic characters and yield of Xieyou 084 were studied. [Result] With the increase of planting density, the basic seedling, the highest seedling and effective panicle of Xieyou 084 showed an upward trend. The spike length of Xieyou 084 decreased with the postponing planting seeding period. The total spikelets per panicle, the number of spikelets per panicle, the seed setting rate, the total spikelet yield and yield per unit area tended to increase at first and then decrease with The transplanting density increased, the seed setting rate, thousand kernel weight change was not obvious, the spike length, the total number of grains per panicle and the number of grains per panicle decreased. [Conclusion] The optimum sowing date of Xieyou 084 in the middle and lower reaches of the Yangtze River was in May and the middle of mid-May. The appropriate transplanting density at the middle-upper fertility level was 300,000 holes / hm2.