防治油菜红叶

• 作 者: 沈宏勋
• 机 构: 湖南省桃源县农科所,
• 出 处: 农业科技通讯
• 发表日期: 1983年09期
• 关键词: 油菜田 绿叶面积 光合产物 油莱 老叶 大水漫灌 围沟 叶多 新叶 叶缘

油菜红叶多发生在移栽后至春季前这段时间。据我们1982年调查,全县约有20—30%的油菜田发生红叶,轻的地块红叶株率占10—20%,重的地块达40—50%。油菜发生红叶后,绿叶面积减少,光合产物降低,造成株矮荚少;另一方面,叶片生长停滞,甚至干枯脱落,冬前难以达到叶片指标,直接影响产量。

Rape leaves occur in the transplanted to spring before this period of time. According to our survey in 1982, the county about 20-30% of the rape fields of red leaves, light land red leaf plant rate of 10-20%, 40-50% of the land mass. After the occurrence of red leaves in rapeseed, the area of ​​green leaves decreased, photosynthetic products decreased, resulting in less plant pods; the other hand, leaf growth stagnated, or even dry off before winter, it is difficult to achieve leaf indicators, directly affect the yield.