播期和种植密度对油菜产量和茎秆抗倒性的影响

袁圆,汪波,周广生,刘芳,黄俊生,蒯婕

Effects of Different Sowing Dates and Planting Densities on the Yield and Stem Lodging Resistance of Rapeseed

YUAN Yuan,WANG Bo,ZHOU GuangSheng,LIU Fang,HUANG JunSheng,KUAI Jie

图1 不同播期和密度对油菜茎秆机械强度、地上鲜重和倒伏指数的影响 D1、D2、D3 和 D4 分别表示种植密度为 15×104、30×104、45×104和 60×104株/hm2;T1和T2分别表示9月25日和10月25日播种时间; HZ62和FY520分别表示品种为华油杂62和沣油520。下同

Fig. 1 Effects of different sowing dates and planting densities on mechanical strength, above-ground fresh weight and lodging index of rapeseed stem D1, D2, D3, and D4 indicate the planting densities of 15×104, 30×104, 45×104 and 60×104 plants/hm2, respectively; T1 and T2 represent respectively sowing time on September 25 and October 25. HZ62 and FY520 represent respectively varieties of huayouza 62 and fengyou 520. The same as below