Planting time of spring sweet potato

The planting time of spring sweet potato is from April to May every spring, and the temperature at this stage is stable at about 15-20 ℃, which is beneficial to the rapid germination of sweet potato. Seed potatoes with large size, no defects, no bitten by rats and insects, more bud points and exuberant vitality should be selected for planting. In the later stage, rational fertilization, timely seedling compliance, and active prevention and control of diseases and insect pests can be harvested from September to October.

1. Planting time of spring sweet potato

Sweet potato is generally sown from April to May in spring, and the best sowing time is in the middle of May. The temperature at this stage is relatively stable, about 15-20 ℃, which is beneficial to the rapid germination of sweet potato.

II. Planting methods

1. Seed selection

Need to select seeds before planting, should choose a relatively large size, no defects, has not been bitten by rats and insects, sweet potatoes grow more bud points, strong vitality of the seed potato for planting.

Although the cultivation of sweet potato is relatively simple, if you want to have high rooting and germination rate and high yield, you must choose a good seed.

2. Sowing seeds

In order to prevent some diseases and to prevent seed potatoes from being eaten by mice before germination, seed potatoes should be soaked in carbendazim solution for about 10 minutes before sowing.

When sowing, you must distinguish between the head and the tail, otherwise it will affect the germination rate, if you are not clear, you can put it diagonally, and then cover it with a layer of decaying wood and a layer of thin soil, and if the temperature does not reach, you can also cover a layer of film.

General sweet potato seedlings grow to 30-40cm can be pruned, cut into three true leaves for a node, can be cut, each plant interval of about 30cm.

3. Timely fertilization

After planting, in order to let the cuttage sweet potato seedlings grow roots quickly, it needs to be fertilized, usually with human feces and urine.

After the sweet potato survives, it is necessary to top fertilize and apply the right amount of urea, mainly for the sake of the seedlings, because the growth is different and looks uneven.

At a certain stage of growth, it is necessary to apply seedling fertilizer, mainly urea, to the right amount of compound fertilizer.

Finally, strong fruit fertilizer was applied, mainly potash fertilizer and boron fertilizer.

4. Follow the seedling in time

When the sweet potato seedlings grow to a certain stage, the sweet potato vines should be cleaned up to one direction and grow in one direction, which is not only conducive to the late harvest, but also remove the excess branches and leaves so as not to consume nutrients.

5. prevention and control of diseases and insect pests

Common diseases and insect pests are voles, grubs, leaf curlers and aphids. Voles and grubs like to eat sweet potatoes in the field, which will bite the sweet potatoes, and leaf rollers and aphids will affect the photosynthesis of sweet potato leaves.

In view of the vole generally used to trap and kill, the vole favorite food mixed with rodenticide in the field for trapping and killing, harmful branches and leaves of insect pests can be sprayed with trichlorfon solution.

6. Harvest

General harvest in September-October, the need to first cut off sweet potato vines, and then dig out sweet potatoes, dug out, in order to prevent water loss need to store sweet potatoes in the cellar, otherwise it is easy to cause decay.