油菜是根系比较发达的旱地作物。怕水涝,需要土层深厚、疏松、适度干燥的土壤。实践证明:田不干,苗不长,植株瘦小;田干好,苗肯长,植株茁壮。 稻田种油菜,要及早排干田水,这是决定油菜产量高低的关键措施。大的田块除开边沟背沟,还要开中沟、腰沟、厢沟。整坝整垮的稻田连片种油菜,要统一规格,按倾斜面,对缺开沟,沟沟相通,有效地控制潜流水,加速地面径流,彻底排干田水。特别 Rape is a well-developed dry-land crop. Fear of waterlogging, the need for deep soil, loose, moderately dry soil. Practice has proved that: Tian quit, the seedling is not long, the plant is small and thin; Tiangan good, Miao long, plants robust. Paddy rapeseed, to drained field water early, this is the key to determine the level of rapeseed production. In addition to open a large plots ditch ditch, but also open in the ditch, waist ditch, ditch. The whole dam collapsed paddy rape species, to a unified specification, according to the inclined plane, the lack of ditches, gully interlinked, effectively control the sub-flow of water to speed up the ground runoff, draining field water completely. especially