作物在有性生殖时期,对不利的栽培因素反应非常敏感,且一经受到障碍,就不象营养生长时期那样易于挽救,这是一种普遍现象。作为具有无限开花习性,以收获种子为目的的油菜,进入春季以后,由营养生长和生殖生长的两旺时期逐渐转入以生殖生长为主的时期,且生殖生长时期较长,生长条件变动又大,因而植株常出现早衰、重花、阴角、秕粒和脱落等不良现象。所以做好油菜春季田间管理工作,对夺取高产具有很重要的作用。生产实践证明,春季田间管理工作,仍应以肥水管理为中心,兼防病害。但 Crops are very sensitive to unfavorable cultivation factors during sexual reproduction and are generally not readily salvaged as they are during vegetative growth once they have been compromised. As a rape with unlimited flowering habits and harvesting seeds, after entering the spring, the breezy period of vegetative and reproductive growth gradually shifted to a period dominated by reproductive growth, with longer reproductive growth periods and changing growth conditions Large, and thus plants often appear premature aging, heavy flowers, Yin angle, Chu tablets and fall off and other undesirable phenomena. So doing rape spring field management work, to seize the high yield has a very important role. Production practice has proved that field management in spring should still be fertilizer and water management as the center, and prevent diseases. but