杂交油菜黔油22号氮素运筹研究

为探索氮素对杂交油菜黔油22号产量的影响及提高氮素的利用率,进行了氮素运筹的试验研究.结果表明:在基肥和苗肥用量相同的情况下,不同的蕾薹肥及初花肥施用比例对黔油22号产量和单株有效角果数的影响呈相同趋势,即随着蕾薹肥用量的增加及初花肥的降低,产量和单株有效角果数逐渐增加.因此,在营养生长和生殖生长两旺的蕾薹期,是决定黔油22号产量的关键施氮期,获得高产的氮素运筹最佳措施是基肥:苗肥:蕾薹肥:初花肥比例为2:3:4:1或2:3:3:2.

The Effects of Different Nitrogen Application Norm at Different Growth Stage on Yield of Qianyou 22 (a Hybrid Rape Variety)

Qianyou 22,a hybrid rape variety,was tested under different nitrogen application norm at different growth stage to study the effects on its yield and to improve the nitrogen utilization rate.The results showed that different nitrogen application proportions at bolting and first flowering stages have the similar effect on yield and effective podsperplant of Qianyou 22 under the same application amount of basal manure and seedling manure.That is,the yield and effective podsperplant of Qianyou 22 rises with in...