Potato Pregermination Priming Technology

In the central and southern parts of China, the potato was cultivated in high ridges in the early spring, and germination was carried out in the middle and late February. In the middle and early March, the fields were planted in the middle and early middle of the year to effectively avoid the cold damage in early spring, and the emergence of the potato was quick, orderly, and the yield and quality were improved. Harvesting can be completed in the middle and early June. It does not affect the growth of summer crops and increases planting income. The pre-emergence germination techniques are as follows:

1. Choose a thoroughbred. Choose early potato, fast tuber enlargement, short dormancy period, high yield and quality, strong disease resistance and early maturing quality, such as Holland No. 7, Holland No. 15, Favorita, and Early White. Seed potatoes must purchase certified virus-free seed potatoes. Do not plant commercial potatoes as seed potatoes.

2. Sun type wake up potatoes. Seed potatoes have been stored in cold storage for a long time. The temperature in the body is low and they are in a dormant state. They cannot be immediately warmed and germinated. They should first be sown and refreshed to break their dormancy. Method: In sunny days, pick the good seed potatoes and put them in the sun at 12°C～15°C to release the dormancy. During the day, the potato was evenly spread and the rotten, diseased, deformed and frozen potato was removed.

3 careful cutting. Potatoes were excised for 3 to 4 days before cutting. When cutting, prepare two cutters per person and immerse them in 75% alcohol or 0.5% potassium permanganate solution. After each cut of a seed potato, change the knife, especially cut to the disease, bad potatoes, the knife should be soaked in disinfectant, while removing the disease, bad potatoes, for another cutting knife to continue cutting. Because the tail buds are lower in yield than the top buds or lateral buds, the tail buds should be removed before cutting. Potato pieces should have more pieces of potato meat, each piece should be no less than 25 grams, 50 to 100 grams of seed chips should be cut into 3 to 4 pieces from the bottom. When the seed potatoes are too large, they can be started from the tail and arranged spirally from the bottom of the sprouts from the bottom. Diagonal cut, each piece of seed as far as possible with the central part of the buds, so that each potato block with 1-2 buds.

4. Sterilization and germination. 150 kg of sesame seeds for each 150 kilograms of talcum powder 3 kg, 72% of agricultural streptomycin soluble powder 125 g, 70% thiophanate-methyl WP 125 g, 3 kinds of powder mixing and stirring, evenly spread the dried potato chips on. Then cover with damp cloth, put into the room temperature 15 °C ~ 18 °C, humidity 85% indoor germination. To check the temperature and humidity frequently, check the germination every 4 to 5 days. If you find that the bad potatoes are picked out in time, when the buds grow to 0.5 to 1 cm, they should be uniformly scattered under the scattered light, until the buds turn into dark green. You can sow at the right time.

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