江苏沿海地区粤优938母本不同机插密度对制种产量的影响

Effects of Different Mechanical Transplanting Densities of Female Parent Yueyou 938 on Hybrid Seed Production Yield in Jiangsu Coastal Area

[目的]为大面积生产提供技术指导。[方法]研究了江苏沿海地区粤优938母本不同机插密度对制种产量的影响。[结果]随着机插密度的减小,播始历期、抽穗历期与盛穗历期呈不断延长的趋势,而有效穗、成穗率、总颖花数呈上升的趋势。[结论]江苏沿海地区粤优938母本机插应采用30cm×12cm的栽插密度,父母本播差期较人工栽插延长4d左右,每穴栽插3~4苗,以6行母本配1行父本栽插方式较好。

[Objective]To provide technical guidance for the large scale production.[Method]We researched the effects of different mechanical transplanting densities of female parent Yueyou 938 on hybrid seed production yield in Jiangsu coastal area.[Result]With the decrease of planting density,the sowing beginning period,heading period and blooming period showed a trend of continuous extension,while the effective spike,panicle bearing tiller rate and total spikelet number trended to increase.[Conclusion]The transplanting density 30 cm×12cm with 3-4 seedlings in each hole of female parent Yueyou 938 would be better in Jiangsu coastal area.The sowing period of both parents was about 4 d longer than that of artificial transplanting,and the transplanting pattern should be six lines of female parent with 1 line of male parent.