How to grow purple yam? Do you need to cover with plastic film?

Yam is what we usually buy more, not only can make soup, but also can be eaten with desserts. Now the purple yam on the market is very popular, and many novice growers are also observing it. So how to grow purple yam? Let's have a look together!

How to plant purple yam

1. Land selection and preparation

Purple yam is suitable for the land with convenient drainage and irrigation, loose and fertile soil and deep soil layer, and the sandy loam or loam with good permeability is suitable, but the clayey or hard soil is not suitable, which will affect the growth and development of its tuber and lead to its bifurcation or deformity. affect yield and quality. When planting, deep ploughing should be carried out in advance, and the sun should be used to whiten it, disinfect and sterilize it, and make the border in the soil preparation. Generally, the width of the border is about 50 cm, the height of the border is about 30 cm, and the width of the ditch is about 30 cm.

2. Sowing seeds

Before sowing, we should first choose the disease-free seed potato, after removing the soil, cut into potato pieces with a length of about 5 cm and a weight of about 40-50 grams, smear lime or plant ash after the wound, and sow seeds after the wound is dried. Attention should be paid to disinfecting knives when cutting pieces to avoid bacterial infection. The sowing time is generally chosen before and after the Qingming Festival, using the way of single plant and single row, generally controlling the row spacing of 30 × 80 cm, planting about 2800 plants per mu, and using seeds of about 130kg per mu. When planting, ditch and fertilize the border, apply compound fertilizer or farm manure into it, cover a layer of soil, and then put the seed potato into it.

3. Field management

The plastic film should be covered after sowing, and the plastic film should be tightly compacted all around after the plastic film is covered, and the plastic film should be suppressed with soil clods so as not to be destroyed by the wind, and the film should be broken in time after emergence, so as not to burn the seedling leaves in contact with the plastic film, and it is better for the plastic film to be black. It is necessary to set up a frame to draw the vine in time after emergence, you can use a thin bamboo pole to build a herringbone frame, and the bracket should be firmly inserted and fastened to avoid being blown by the wind.

4. Fertilizer and water management

In addition to applying base fertilizer when sowing, a large amount of fertilizer is needed during the growth of purple yam, and it is also necessary to topdressing at the right time. Generally, 25-35 kg of compound fertilizer and 10 kg of urea should be applied per mu when the stem is full of vines. In the growth anger, potassium dihydrogen phosphate and urea solution should be sprayed many times to avoid premature senescence of leaves. It is high temperature and rainy in summer, and it is very easy to accumulate water and waterlogged days. In order to prevent waterlogging, it is necessary to do a good job of drainage and moisture, while in the dry weather for a week from July to August, it is necessary to irrigate in time to keep the soil moist.

The question about the cultivation of purple yam is summarized here by Tuliu.com today. You can try it according to your usual planting experience and then refer to the above content.