What are the seed selection and seedling-raising methods for choy sum?
Choy sumis commonly known as "cai jian" or "choy sum", and because it is tender and delicious, it is loved by the general public. At present, there are relatively many varieties of choy sum in the Shanghai area of China, mainly eaten as a vegetable, with good flavor, and it is a famous specialty vegetable. So how is this vegetable grown? The key lies in seed selection and seedling raising!
How to select choy sum seeds?
For seeds, try to choose those with stronger virus resistance, so that the choy sum grown can avoid the roots of the choy sum being damaged. As for varieties, choose those with stable high yield and good marketability, and at present the choy sum varieties that are more widely planted are also very abundant. It is recommended to decide comprehensively according to all aspects of the planting area, such as red choy sum, rapeseed choy sum, late choy sum; others such as Dongchangqing, February Slow and March Slow are also fine.
How to raise choy sum seedlings?
1. Plot selection
Try to choose a plot with loose and fertile soil, which is more conducive to sowing choy sum. If the land needs to be prepared, make preparations in advance and do not delay the best sowing period. When turning over the soil, you can also add all those base fertilizers into the soil together and mix them thoroughly, so the plot problem is almost solved.
2. Seedling stage management
The seedling stage of white choy sum is 15-22 days, and that of red choy sum is 25-40 days. The seedbed is set according to the 1:10 standard. For example, transplanting one mu of field requires at least one fen of seedbed. During the seedling stage, focus on preventing insects such as flea beetles of varying severity and various underground pests. In the middle and late stages, prevent diseases and carry medicine to the field. One week before transplanting, add Tianfengsu once to promote root growth and improve the survival rate of transplanted seedlings.
3. Seedling raising and transplanting
When raising seedlings, note that after the seeds have grown a few tender sprouts, the seedlings should be watered to ensure they can absorb enough water. When transplanting, the seedlings already cultivated in the seedbed can be slowly transplanted into the soil, with sufficient base fertilizer applied and moist soil plowed, requiring a ridge width of 1.8 m.
4. Seedling stage management
Focus on disease prevention and the damage caused by insect pests and weeds, and achieve early prevention and early control. In addition, fertilize scientifically: apply 100 kg of high-quality compound fertilizer per mu, and also apply 200 jin of ammonium bicarbonate per mu to promote early seedling growth and prevent and control weeds. After transplanting for 7-10 days, bolting begins and should be pinched off in time.
Overall, choy sum is a green and healthy vegetable, and it is not too difficult to grow. After learning the above tips, I believe it can bring good growing results and a bumper yield.
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