How do sweet potatoes cover with plastic film? How to use plastic film mulching technology in sweet potato field?

Sweet potato mulching with plastic film can improve low temperature, keep soil moisture, prevent soil hardening and reduce the harm of weeds. How do you cover sweet potatoes? How to use plastic film mulching technology in sweet potato fields?

I. Film form

There are two forms of transplanting seedlings after mulching and transplanting after mulching, and transplanting after mulching is more extensive. Generally, after ridging, herbicide is sprayed and covered with plastic film. After covering, it can be stopped for a few days to improve the ground temperature, and then planted.

At present, the rotary tillage ridging and film mulching integrated machine has been developed in China, which can greatly reduce labor intensity and facilitate field operation, especially in spring when the wind is strong and artificial film mulching is laborious.

Second, the benefits of sweet potato field mulching

1. The advantages of sweet potato film mulching are that heat preservation and moisture are conducive to rooting, rooting is fast, and the roots are developed and robust.

2. The ground characteristics are fast seedling return, strong plants, developed leaves, improved photosynthesis and oxygen production capacity, thus achieving yield increase.

3, and then weeding harm, effectively saving manpower and material resources.

Three, the main points of coating technology

Choose the soil, cover the good and not cover the bad

More fertilizer, more than enough

Breeding strong seedlings, strong cover not weak cover

Cover wet but not dry

Early planting at the right time

Increase density, cover tight but not thin

IV. Operating procedures and standards of plastic film mulching cultivation

1. Choose the right film:

Sweet potato mulch mostly uses transparent film, transparent film cost is lower, soil temperature rises quickly. But high quality black film is beneficial to high yield and control weed growth.

2. Fertilization, irrigation and soil preparation:

Because it is inconvenient to apply fertilizer and pesticide after planting sweet potato covered with plastic film, it is necessary to apply sufficient base fertilizer before soil preparation, and it is better to apply more organic fertilizer. In dry years, irrigation is needed to keep soil moisture suitable.

The high-potassium compound fertilizer and the biological organic bacterial fertilizer are matched and used, so that the combination of organic and inorganic is realized, the nutrients are comprehensive, the requirements of the sweet potato on nitrogen, phosphorus and potassium can be met, the soil can be improved, the disease resistance of the sweet potato can be improved, and the sweet potato planted has high yield, high quality, delicious and sweet taste.

Apply pesticides before ridging such as:

6% Du·Xin Granule can effectively control underground pests such as white grubs, grub, cutworm, etc., with a dosage of 5-8kg per mu;

Spraying 50% propisochlor EC and other herbicides before film mulching can control gramineous weeds and some broadleaf grasses (spraying after grass emergence is ineffective), 220-250ml/mu, add 40kg water and spray evenly.

3. Ridging cover film:

Sweet potato mulching cultivation, should adopt high ridge or ridge, ridge spacing 80-90cm, height 30cm above. Ridge surface slightly arched round, film tension when covered.

4. Planting potato seedlings after mulching:

After planting potato seedlings covered with plastic film, watering can be carried out by using a point-fixing watering device. Three leaves are left on the upper part of the seedlings when planting. When burying the soil, avoid dipping the tips of the seedlings into the soil.

5, plastic film cultivation precautions:

After ridging and spraying, film should be covered in time to keep soil moisture and reduce water evaporation.

If the herbicide is coated immediately after spraying, the spraying concentration can be appropriately reduced to prevent burning of potato seedlings.

When covering the film, it should be tightened and smoothed, completely adhered to the ridge surface, and the film should be compacted with soil in the furrow.

Why does plastic film mulching reduce sweet potato production?

These conditions mainly occur in particularly arid areas in spring, and if the soil is too dry during mulching, it is easy to cause sweet potato not to get sufficient moisture in the early stage. Soil moisture can be increased by watering the plants more often. In addition, if full mulching is adopted, the soil can get less rainwater, and most of the rainwater will be lost, which will also cause artificial drought, but generally will not cause serious impact.