种植密度对油菜“浙油50”菌核病及产量的影响

Influence of Different Planting Densities on Sclerotinia of Rape Variety “Zheyou 50”and Its Yield

[目的]探讨不同种植密度对油菜品种"浙油50"菌核病及产量的影响。[方法]以浙江省油菜主栽品种"浙油50"为研究对象,进行不同种植密度试验,按4级分级标准计算病株率和病情指数,并计算油菜籽产量。[结果"]浙油50"在迟播时,其适宜的播种量为3.75kg/hm2,在该种植密度下,能充分发挥油菜个体植株的生长优势,同时病株率和病情指数相对较低,因而能获得较高产量。[结论]该研究为油菜菌核病的综合防控提供了一定的依据。

[Objective] To study the influence of different planting densities on sclerotinia of ＂Zheyou 50＂ and its yield. [Method] Taking ＂Zheyou 50＂, major cultivated rape variety in Zhejiang Pro- vince for example, experiments of different planting densities were carried out, rate of diseased plant, and disease index calculated according to the 4-grade gradhag standards, and rapeseed output calculated. [Result] In the late sowing, suitable seeding quantity was 3.75 kg/hmz, with which growth vigor of individual plants would be fully developed, rate of diseased plant and disease index would decline, and higher yield would be achieved. [Conclusion] This study provided scientific support for the compre- hensive prevention and control of sclerotinia