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通过对甘蓝型隐性核不育两型系杂交油菜制种母本设置 3个移栽密度、可育株拔除设置 2个不同时期的研究 ,结果表明 :增加母本种植密度有一定的增产作用 ,增产率仅为 0 .7%～ 2 .0 % ,效果不显著 ,但密度加大 ,拔除可育株工作量增加 ,投入加大 ,比较效益降低 ,合理的密度以 6 0 0 0～ 80 0 0株 /6 6 7m2为宜 ;拔除可育株时期在蕾期比在临花期提高制种产量达 17.3～ 2 0 .4 kg/6 6 7m2 ,增产率 30 .5 %～ 36 .6 9% ,增产效果极显著。因此 ,蕾期是隐性核不育两系杂交油菜制种拔除可育株的最佳时期 ,特别是母本种植密度较大时更应掌握在蕾期尽早拔除。其技术已在制种区得到普遍应用。
Three transplanting densities were set on female parent of two-genotype hybrid of Brassica campestris L.secondary sterile line, and two different periods of fertile plants were set off. The results showed that increasing the density of female parent had some effects of increasing yield , The rate of increase was only 0.7% ~ 2.0%, the effect was not significant, but the density increased, the removal of fertile strains increased workload, investment increased, the comparative benefit decreased, a reasonable density of 600 ~ 80 0 0 plants / 6 6 7m2 is suitable; unpowered plants at the bud stage than in the flowering stage increased seed production up to 17.3 ~ 20.4 kg / 6 67m2, yield 30.5% ~ 36.69 %, The yield effect is extremely significant. Therefore, the bud stage is the best time for seed production of recessive nuclear sterile two-line hybrid rapeseed, especially when the mother-plant density is larger, it should be removed as early as possible in bud stage. Its technology has been widely used in the seed production area.