播期和种植密度对油菜品种湘杂油7号产量及品质的影响

Effects of sowing dates and plant densities on yield and quality of rape seed variety Xiangzayou 7

进行不同播期和种植密度对油菜品种湘杂油7号产量及品质影响试验。结果表明,播期和种植密度对湘杂油7号产量及品质有一定的影响,在相同播期条件下,湘杂油7号植株的株高、有效分枝数、单株鲜重、单株角果数、每角果粒数、芥酸和硫苷含量等均随着种植密度的增加而递减,千粒重与播期和种植密度关系则不明显;单位面积有效角果数、每角果粒数、千粒重是决定油菜产量的变异因子,其中单位面积有效角果数对产量的影响最大,每角果粒数次之,千粒重最小。综合不同播期和种植密度2因素处理对湘杂油7号产量及品质的影响结果,以9月15日播种、种植密度135000株/ha最好。

The present experiment has been conducted to study the effects of different sowing dates and plant densities on the yield and quality of rape seed variety Xiangzayou 7.The results showed that plant height,effective branch number,fresh weight per plant,number of pods per plant,seed number per pod,contents of glucosinolates and erucic acid decreased with increase in plant density in the same sowing date treatments.1000-seed weight did not show significant differences in relation to sowing date and plant density.Pods number unit area,seed number per pod and 1000-seed weight were the decisive mutagenic factors of rape yield,and pods number unit area had the maximum effect on yield,followed by seed number per pod,1000-seed weight had the minimum effect.The results revealed that the treatment with sowing date on 15th Sep and plant density 135000 plants per hectare was the best.