油菜在调整种植业结构上具有重要意义。特别是在热量资源不足及生产资金极度困难的严峻形势下 ,积极开发和扩大油菜种植面积更具有比较突出的现实意义。一、选地及整地油菜怕涝 ,因此要选岗坡、排水良好的地块 ,避开风口。油菜种子很小 ,发芽能力和顶土能力较弱 ,对整地的要求 Rape in the adjustment of planting structure is of great significance. Especially under the severe situation of insufficient heat resources and extremely difficult production funds, it is of more practical significance to actively develop and expand the planting area of ​​rapeseed. First, the selection and site preparation rape afraid of waterlogging, so to choose Kong slope, well-drained plot, to avoid the tuyere. Rape seed is very small, ability to sprout and top soil is weak, the requirements of soil preparation