As the main food crop, sweet potato has important significance. Recently, it is worthy of the sweet potato planting season. Xiaobian introduces a new variety, detoxification sweet potato, potato 19, and introduces the high-yield planting technology of Shangshu 19 for the majority of growers. reference.
Characteristics of Shangshu 19 varieties:
The leaves of Shangyan 19 seedlings were purple, the petioles and stems were blue-green, the stems were thick and the internodes were short. Potato block spindle shape, red skin white meat, starch rate 22-25% spring potato, 18% summer potato, good germination during seedling, neat seedling, strong seedling, good disease resistance. After transplanting, the live tree is fast, the potato is early, the potato is more, the stem nematode is resistant, and the root rot is high.
Shangshu 19 cultivation points:
First, nursery
The sweet potato seedling time is from March 15 to 20, and the small bow shed solar seedling method is the best. It should not be too early, the seedlings are slow, the emergence is less, and the bed is easy to burn. The seedbed is 1.3-1.5 meters wide and avoids wide beds. The next amount is 50-70 kg per mu of sweet potato.
Second, fertilization
Sweet potato is a potassium-producing crop. According to soil conditions, the level of fertilization is generally residual nitrogen in the soil. Potassium is generally insufficient to increase potassium fertilizer. The ratio of NPK is 2:1:3. It is clear that the absorption rate of potassium is higher than that of other crops. Specifically, the amount of fertilizer applied to the field is roughly divided into three types, which should be used by farmers.
The first type of soil with high soil fertility does not apply nitrogen fertilizer and phosphate fertilizer, and applies 30 kg of potassium sulfate per acre (no potassium chloride can be used).
The second type of soil fertility field is 5-6 kg per mu, 25-30 kg superphosphate, 20-25 kg potassium sulfate or potassium sulfate type (N, P, K=15, 15, 15 ) Compound fertilizer 25-30 kg per mu.
The third type of field with soil fertility is 15-20 kg per mu, 40-50 kg superphosphate, and 20-25 kg potassium sulfate. Fertilization methods are used as base fertilizers.
Third, the planting density
Spring sweet potato 3500-4000 per mu, summer sweet potato 4000- 4500 per mu.
Fourth, prevention and control of pests and diseases
In order to increase the yield and commodity rate, we must control the pests and diseases, and do the following work:
1. Seed potatoes for seedlings should be scalded and soaked in warm water at 51-54 degrees Celsius for 10 minutes.
2, 2 acres of landworms per acre (or killing the groundworms) 2 kg before the Fusui. In mid-July, the golden fly was in full bloom, and then 1 kg of soil per mu was used to spread the soil into the soil.
3, cutting seedlings planted, absolutely can not pull out the seedlings to avoid the bacteria into the field, the length of the cutting seedlings is about 15 cm, not too long.
The high-yield planting points of Shangshu 19 seem simple, but it is not easy to do, but sweet potatoes are easier to grow and manage than other crops.
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YT-68
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