杂交油菜制种提高母本制种结实率的研究 Ⅱ.不同海拔高度对母本结实率和产量的影响

Increasing Female Parent's Setting Fruit Rate as Producing Hybrid Rape Seed Ⅱ The Different Elevation Affection Setting Fruit Rate and Yield of Female

在油菜制种区选择不同海拔高度的制种田花期进行田间小气候记载和 70块制种田进行结实情况考查 ,并对历年5 0 0余公顷的制种田的实际产量资料进行统计分析 ,结果显示不同海拔高度制种田母本结实情况和产量存在着明显差异 :海拔较高的制种区 ,油菜初花晚 ,花期内气温较高且变化相对稳定 ,母本平均有效角率、角粒数和结实系数较高 ,实收产量也相对较高。海拔在 70 0 m以上比海拔 5 0 0 m左右的制种油菜结实系数要高 2 %～ 3% ,产量高出 5 kg/6 6 7m2 左右。因此 ,在选择制种隔离区时 。

On seed production area for rape chose the different elevation, recorded partial climate on the fields in sowing date and investigated setting fruit in 70 blocks of field, and realistic yield about more than 500 hm2 field in last years was statisticsed and analyzed.The result showed that setting fruits and yields of the female parent were clear difference in fields of the different elevations. Early flower of rape is later, in sowing date, atmospheric temperature is higher and change is relatively stable, effective pod rate, grains of per pod and setting fruit coefficient are higher and real yield as well. Setting fruit coefficient is higher 2%~3% and the yields is higher about 5kg.667m -2 above the elevation of 700 meters than that of 500 meters. So as choosing production seed area, best for more high elevation area.