母本密度对黔油14号制种产量及生育特性的影响

Influence of different density of female plant on the yield and growing stage of Qianyou No14

对杂交油菜黔油14号母本设置7个移栽密度，研究密度对黔油14号制种产量和母本经济性状及生育特性的影响。结果表明，制种产量随密度的增加而有增加的趋势，产量差异达显著水平。当母本移栽密度为1．6万株·667m^-2时，制种产量为最高，达到55．69kg·667m^-2，但结合比较效益，贵阳地区生产黔油14号的母本种植密度以1．0万株·667m^-2为宜。母本种植密度对一次有效分枝数、植株分枝高度、单株有效角果数、千粒重的影响较大，相关系数分别为：-0．92216、0．81856、-0．74314、0．78038；母本全生育期为234—236d，播种至现蕾、现蕾至初花、初花至终花、终花至成熟经历的时间分别为85—87d、79—85d、32—40d、29—31d。

The experiment including 7 transplanting densities of female plant of Qianyou No14 was designed. The result showed that the seed yield increased along with the increase of the female density and the difference of seed yield was significant level. The yield reached 55. 69 kg·667m^-2 with transplanting densities of female plant in 16 000 plants·667m^-2. The rational density of 10 000 plants·667m^-2 should be popularized in Guiyang region. The largest effect of planting density was found in the first primary branch, the height of primary branches,total pods, 1 000-seed weight and the correlation coefficients were -0. 922 16,0. 818 56, -0. 743 14,0. 780 38 respectively. The total growing stage of female parent is 234 -236d. Seeding to buddings, buddings to initial anthesis,initial anthesis to end anthesis, end anthesis to maturity were 85 -87d,79 -85d,32- 40d, 29 -31d respectively.