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在北方菜花留种比较困难,隔年留种是大部分蔬菜作物的有效途径,但菜花由于带花球,花球在冬季易受冻或腐烂。近几年,我们尝试在塑料大棚中早育苗,当年进行繁殖留种,取得较好效果。 1.育苗:2月下旬在钢架大棚或简易大棚中进行育苗,育苗一般在塑料营养钵或自制纸营养钵中,营养土配制农田土4份,腐熟农家肥1份,再放少许氮磷复合肥搀匀即可,装钵8分满,每个塑料营养钵中点8～10粒籽,纸制营养钵中放2～3粒籽,点播深度1～2厘米,上复一薄层沙,苗育完后用洒壶细水轻浇。在育苗到出苗这一阶段,要勤细浇水,并注意保持棚湿。这时天气较冷,棚内要有火炉,白天揭开棚膜上的毯子,晚上要注意盖好膜毯,温度一般保持在15～18℃,10～15天就可以出苗。出苗后要控制浇水,以防徒长,在移苗前4～5天要注意放苗,少浇水,进行抗旱锻炼。 2.移苗前的土壤准备。菜花留种一般以前作
It is more difficult to grow cauliflower in the north and to keep the next year is an effective way for most of the vegetable crops. However, the cauliflower is susceptible to freezing or decaying in winter because of the flower-ball. In recent years, we try to nurture early nursery plants in plastic greenhouses, and then breed them for better breeding results. 1. Nursery: nursery in late February in a steel shed or simple greenhouse nursery plastic bowl or self-made nutrition bowl, nutrition soil preparation farmland soil 4, decomposed farmhouse fertilizer 1, and then put a little nitrogen and phosphorus Compound fertilizer can be evenly mixed, filling the bowl 8 points full, each plastic bowl 8 to 10 seeds, paper nutrition Bowl put 2 to 3 seeds, on-demand depth of 1 to 2 cm, on the complex a thin layer Sand, seedling after sprinkling fine water pouring. In the nursery to emergence of this stage, we should diligently watering, and pay attention to keep shed wet. At this time the weather is colder, the shed has a stove, shed film on the blanket opened during the day, pay attention to cover the film blanket at night, the temperature is generally maintained at 15 ~ 18 ℃, 10 to 15 days can emerge. Watering should be controlled after emergence, to prevent leggy, 4 to 5 days before the Miao Miao should pay attention to Fangmiao, less watering, anti-drought exercise. 2. Pre-transplant soil preparation. Cauliflower seed generally used to make