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油菜与绝大多数农作物一样,它的生长发育的全过程与水分密切相关。因此,了解油菜生育过程对水分的要求,从而制定合理灌排措施,是进一步发挥油菜增产潜力的关键一环。 一、油菜各生育时期的需水特性 油菜为需水较多的植物。但不同类型的油菜对水分条件要求是不相同的,抵抗或忍耐干旱或渍害的能力亦有差别。白菜型油菜耐旱性弱,芥菜型油菜较强,甘蓝型油菜则介于两者之间。白菜型耐湿性强,甘蓝型耐湿性则差。同一类型不同品种之间的耐旱性与耐湿性也有差异,试验表明:旱害与湿害之间有明显的负相关(r=-0.995±
Rape and most crops, like its growth and development of the whole process is closely related to water. Therefore, to understand the rape’s reproductive process requirements of water, so as to formulate a reasonable irrigation and drainage measures, is to further play a key part of rapeseed production potential. First, the characteristics of rapeseed water demand during the growing rape to water more plants. However, different types of rape require different moisture conditions, and their ability to resist or endure drought or waterlogging is also different. Brassica napus is weak in drought tolerance, stronger in Brassica juncea and in between Brassica napus. Cabbage-type moisture resistance, cabbage-type moisture resistance is poor. The same type of different varieties of drought resistance and moisture resistance are also different, the test showed that: there is a clear negative correlation between drought and wet damage (r = -0.995 ±