What solar terms does sweet potato grow?

Sweet potato, also known as sweet potato, is an easy-to-grow crop in food products, and the output of casual planting is also very good. Now the use of sweet potato has been popularized. Sweet potato leaves are also a very delicious vegetable. Sweet potatoes can be made into various foods, which can be said to usher in a new era.

Sweet potato planting time Tomb-Sweeping Day is the most suitable time to plant sweet potato seedlings. At this time, the weather will basically be in a stable state. After the end of late frost, it is suitable to plant seedlings when the ground temperature around 10 cm reaches 15 degrees Celsius. At the winter meeting the year before last, the ground was turned over in advance to bask in the sun at the beginning of that year, and ridges were raised when planting.

The interpolation time should not exceed the middle of April, otherwise the harvest time will be later, which will affect the planting of the next crop.

Planting method 1, land selection and soil preparation, and formula fertilization Purple sweet potato is a drought-resistant and barren-tolerant crop, and its soil requirements are not strict.

In order to obtain high yield, loam with loose soil, good drainage and rich organic matter is selected for planting, which is beneficial to root swelling and high yield.

According to the characteristics of fertilizer requirement of purple sweet potato, combined with the results of soil testing, a reasonable formula ratio of nitrogen, phosphorus and potassium was formulated.

Fertilization method is: generally, apply decomposed farmyard manure 1000 ~ 2000 kg per mu, and after application, 10 ~ 15cm shallow tillage. Filling fertilizer is used when ridging, 30-50kg ternary compound fertilizer and 20-25kg potassium sulfate are used per mu, and one side is ridged first and then fertilized according to the ridge width of 80-90cm.

Strictly control the amount of nitrogen fertilizer used in production to prevent excessive nitrogen fertilizer from causing excessive growth.

Because purple sweet potato is drought-resistant and waterlogged-resistant, the drainage ditch is dug in the planting field as required, which plays a good drainage role in the case of more rain.

2. Plastic film mulching cultivation is beneficial to increase ground temperature, reduce weed damage, prevent vines from consuming soil nutrients and water after elongation, and achieve the purpose of increasing production and income.

After ridging, the land covered with plastic film should be flat, tight, solid and tight. After covering, a soil belt should be pressed every 3-4 meters to prevent the wind from uncovering the cover.

The method of film mulching is to cover the film first and then plant it, and then seal the film mouth to reduce water evaporation.

3, timely early planting according to classification, reasonable close planting, pruning and transplanting in late June.

When transplanting, select strong seedlings with thick vines, short internodes and large and thick leaves, and transplant them by stages: that is, after picking the seedlings, remove the sick and weak seedlings and classify the healthy seedlings to prevent the big seedlings from bullying the small seedlings after transplanting, which will inhibit the growth of the weak seedlings and affect the yield per plant.

When transplanting, transplant according to the row spacing of 80-90 cm and the plant spacing of 25-27 cm, and plant 3000-3500 plants per mu.

4, do a good job in field management, prevention and control of pests and diseases, timely check the replanting of seedlings.

For plots lacking seedlings, replant large seedlings and vines in time to ensure the density.

Secondly, scientifically topdressing, purple sweet potato can generally meet the needs of the whole growth period under the condition of full-foot basal application.

If fertilizer-deficient plots are found before and after clumping trees, 5-7 kilograms of ternary compound fertilizer can be topdressing per mu.

Potassium dihydrogen phosphate can be sprayed on the leaves of plots lacking fertilizer in the later stage.

5. Integrated pest control Before planting, use 3500g phoxim per mu to control underground pests.

Insect pests such as Spodoptera litura, leaf roller and sweet potato moth are controlled with pyrethroid pesticides.

At the beginning of the disease, carbendazim, mancozeb and other sprays were used for prevention and treatment.

6. Timely Harvesting To make purple sweet potato with high yield and high quality, it should be harvested as late as possible, and the yield and quality will be better after entering 165438+ 10.

The above is Bian Xiao's summary about sweet potato cultivation, hoping to help you.

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