菌核病不同发病时期对绵油12产量及品质的影响

Effects of sclerotiose on yield and quality of rape-seed Mianyou 12 in different occurrent periods

通过对不同发病时期的绵油12的千粒重、含油量以及脂肪酸组成含量进行比较,结果表明,初花期感染菌核病造成千粒重损失率为51.77%,盛花期的损失率为45.63%,末花期的损失率为17.66%;在初花期染病的含油量仅为对照的61.25%,盛花期和末花期染病的含油量分别为对照的83.26%和83.85%;由于发病时期不同,在脂肪酸组成、含量上表现出很大的差异。菌核病在初花期发病对油菜的产量和油菜籽品质的影响最大,在生产上需要及时防治。

Thousand-grain weight,off content,composition and content of fatty acids of rape-seed Mianyou 12 had been compared in different occurrent periods of sclerotiose. The results showed that when the disease occurred in the early blooming ,the loss rate of thousand-grain weight was 51.77% ,in the peak blooming the loss rate was 45. 63% and in the late blooming the loss rate was 17. 66%. The oil contents were just 61.25% ,83.26% and 83. 85% compared with CK. The composition and content of fatty acids manifested great difference in different occurrent periods. The effects of selerotiose were the biggest on yield and quality of rape-seed in the early blooming period and attention should be paid to prevent it in time.