(1) Function and use
Cabbage, also known as rapeseed, green vegetables, non-heading cabbage, etc., has a fast growth rate and can quickly increase the supply of fresh vegetables in the market.
(2) Technical brief
1. Variety selection of suitable varieties are Shanghai April slow, Shanghai May slow, Anhui April green, Hangzhou silk cabbage, Nanjing April white, Changsha late cabbage, Shanghai slow February, Shanghai slow March, Wuxi March white, Hangzhou night oil winter, Nanjing white leaves and so on. In South China, there are water cabbage, spring water cabbage, sunflower cabbage, red slow cabbage and so on.
2. There are 2 kinds of sowing methods, 1 live broadcast: 4-5T of decomposed organic fertilizer before planting, ploughing and ploughing, ditching, 20cm, 2 times after emergence, 4-5 pieces of true leaves , plant spacing 15-20cm. The seed amount is 0.5-0.8 kg per mu. 2 nursery: choose soil loose and fertile clods for seedbeds. Apply 1.5-2.0T decomposed organic fertilizer per mu as base fertilizer, with a seed amount of 1.5-2.0kg per acre, and transplant 5-8 acres. Water the water after sowing or step on it with your feet. After emergence, the seedlings are 2-3 times, the seedling distance is about 4cm, and the seedlings can be colonized by 5-6 true leaves. Fertilization before planting, line spacing is equivalent to live broadcast.
3. Fertilizer management before the harvest, apply urea and other quick-acting fertilizers 1-2 times, generally 5-10kg per urea per application. Stop topdressing 10 days before harvesting. Watering is generally combined with fertilization. Plant water should be poured immediately after planting.
4. Pest control is mainly to control aphids, spray powder with 40% dimethoate emulsifiable concentrate 1000-2000 times or 5% malathion powder. Conditional use of 25 mesh or more insect nets for full coverage cultivation.
5. Harvesting of Chinese cabbage is not strict, depending on climatic conditions and consumption habits. From the seedlings of four or five leaves to the growing plants, they can be harvested one after another.
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