我省甘兰型油(艹才)集中产区,多为一年两熟制,茬口紧张,安排不当,贻误农时。而甘兰型油(艹才)生育期较长,苗期生长缓(忄万),推迟(扌布)种,气温降低,冬前苗小、苗弱、贮存养分少,抗寒能力降低,不(?)安全越冬,来年产量很低。实践证明,用同期育苗的“7、8、9”(即根颈粗7毫米,8片叶,9寸高,下同),“6、7、8”,“5、6、7”三种苗势45天苗令的(艹才)苗同期移栽,苗势每降低一级,相对产量降低 Ganlan-type oil in our province (only only) concentrated areas, mostly for two crops a year, crop tension, improper arrangements, delaying farming time. However, the growth rate of Brassica oleracea L. was longer, the seedling growth was slow (忄 million), the temperature was reduced (扌 扌), the temperature was reduced, the seedlings were young and weak, the nutrients were stored less, the cold resistance was reduced, Not (?) Safe winter, the coming year is very low. Practice has proved that with the same nursery “7,8,9” (that is, the root neck coarse 7 mm, 8 leaves, 9 inches high, the same below), “6,7,8”, “5,6,7” tris Seedling potential 45 days Miao Ling (艹 only) Miao transplanting at the same time, each reduction of seedling level, the relative yield decreased