Early spring cabbage ball management focus
Spring cabbage planting varieties in southern Fujian generally use Zhong Gan 21, Zhong Gan 15 and so on, and the growth period is 55-60 days. Colonization before and after convulsions, harvesting before and after May. At present, the early spring cabbage is about to enter the ball phase. This period focuses on strengthening the following aspects of management.
After entering the balling period, cabbage needs more water and fertilizer, and it is necessary to strengthen the management of fertilizer and water. When watering, the application of high-nitrogen and high-potash fertilizer is 20 to 25 kg. This period of cabbage grows fast and has a large amount of growth. It generally accounts for 70% to 80% of the entire growth period of the vegetative growth period. Early-maturing cultivars have a short bulblet period, usually only about 20 days. Therefore, they can be sprayed and sprayed once at the same time. Yulong high-efficiency liquid fertilizer, with 200 grams of mu and added with silicon additives, makes the sprayed liquid penetrate the waxy layer of the leaves, which is beneficial to the absorption of the leaves. After every 5 to 7 days watering 1 times, 5 days before harvest watering and timely harvest.
At the same time, we must strengthen pest control. First, cabbage caterpillar, the main leaves, the ball is often eaten scars, and pull down insects, contaminated leaf ball. The use of 5% emamectin benzoic acid 6 g or flubenzuron biocide 1 g water 15 kg spray control, focusing on spraying leaf heart. The second is the diamondback moth, larvae damage leaves and tender stems, the first instar worms eat leaf meal, a layer of residual epidermis, the 3rd indwelling leaves will bite out of the hole, when severe leaves were mesh or leaves only veins. Per acre with 1.8% avermectin 10 ~ 15 grams of water 15 kilograms spray control.
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