油菜在生长发育过程中若遇到不良因素的影响,会使油菜生长发育受阻,出现异常现象。对这种异常现象,要及时采取补救措施。 一、油菜红叶 油菜直播或移栽之后,每年各地都有部分田块发生不同程度的红叶,先从老叶开始,蔓延至新叶;或先从叶缘开始,再扩展至全叶。引起油菜红叶的原因是多方面的,一般因雨水过多,渍害严重,干旱脱肥,油菜缺素,低温冻害等因素的影响,导致根系生 Rape in the process of growth and development if the impact of adverse factors, will retard the growth and development of rape, anomalies. For this anomaly, we must take timely remedial measures. First, the rape red leaves rapeseed after transplanting or transplanting, every year there are some fields in different degrees of red leaves, starting from the old leaves, spread to the new leaves; or start from the leaf margin, and then extended to the whole leaf. Cause rape leaves are many reasons, usually due to excessive rain, severe stain damage, drought and fattening, lack of rapeseed, low temperature and other factors, the impact of cold damage, leading to root students