两个海拔高度下甘蓝型油菜主要农艺性状及其对产量的影响

Studies on the main agronomic traits and yield of Brassica napus L. at two elevations

以9个甘蓝型油菜品种为研究材料,对其进行两个不同海拔高度的试验。研究表明:在高海拔下,对单株产量贡献大的前六个性状依次是,全株有效果数>每果粒数>千粒重>主序有效果数>分枝部位>主序长度。在低海拔区依次是,每果粒数>全株有效果数>千粒重>主序有效果>主序长度>分枝部位。方差分析结果表明:高海拔区油菜产量低于低海拔区产量,两者差异达极显著。海拔高度升高,油菜的株高、分枝部位、单株产量降低,一次有效分枝数和全株有效果数明显减少,千粒重增加。

Nine varieties of Brcssica napua L. were used in this experiments at two elevations. The results indicated that the contribution order to the yield of per plant was No. of pods 〉 1000-seed weight 〉 pods of stem 〉 branch height 〉 stem length at high elevation area, and seeds per pod 〉 No. of pods per plant 〉 1000-seed weight 〉 pods of stem 〉 stem length 〉 branch height at low elevation area. The yield at high elevation area was less than it was at low elevation area. The variance analysis showed that the difference was remarkable. The plant height, branch height,No, of first branch,and yield per plant would reduce as the elevation gone up hlghly,and the No. of pods per plant reduced remarkably,but the Seeds per pod and 1000-seed weight would increase.