移栽密度对双低油菜新品种苏油8号产量与品质的影响

Effects of Transplanting Density on Seed Yield and Quality of Double-low Rape Suyou No.8

为了探明双低油菜新品种苏油8号的适宜移栽密度,同时保证双低品质,通过田间密度试验研究了不同移栽密度对苏油8号产量与主要品质的影响。结果表明,随着密度的增加,产量有先增后减的趋势,密度间产量差异达显著水平;低密度水平能显著增加全株角果数,密度增加则全株角果数减少,群体总角果数则有先增后减的趋势;不同密度对每角粒数和千粒重影响不大,要取得高产,应主攻群体总角果数;随着密度的增加,主轴和一次分枝有效角果数有所减少,同时单株二次有效分枝数显著减少,其有效角果数减少显著。密度对苏油8号的芥酸、硫苷、含油率及蛋白质含量影响不显著。在该试验条件下,为获得较高产量和保证双低品质,苏油8号的适宜移栽密度为16.5万株/hm^2。

To find out the suitable transplanting density for double low rapeseed varieties Suyou No. 8 and to ensure the quality of double low, we studied the effects of different transplanting densities on Suyou No. 8 yield and main quality by field density test.The results showed that with the increase of the density, production showed a tendency of firstly increase and then decrease, there were significant differences in yield between densities;low density levels could significantly increase the pod number,the whole pod numbers decreased as density increased,while total population pod number showed a tendency of firstly increase and then decrease. Density had little impacts on grains per pod and 1 000-grain weight. In order to achieve high yield, we should pay major attention to total population pod numbers. With the increase of density, principal axis and effective pods of primary branches reduced, at the same time the secondary effective branch number per plant reduced and its effective pods reduced significantly. Density showed no significant impacts on erucic acid, thioglycoside, oil content and protein content of Suyou No. 8. Under the test condition, the proper transplanting density of Suyou No.8 should be 165 thousand plants/hm^2 in order to achieve high yield and to ensure the quality of double low.