Key techniques of potato planting in autumn

The tuber-bearing period of autumn potato cultivation is in the cold season, and the species is not easy to degenerate. In the past, it was mostly used for seed cultivation, but now it has been expanded and become an important vegetable in the first season.

1 kind of potato selection. Seed tubers should be selected for harvest, with good seed character, no symbol of degradation, good performance in all aspects, medium-sized tubers, and sprouting treatment in advance. You can cut into pieces or use whole potatoes. Due to the high autumn sowing temperature, cutting sowing is very easy to cause rotting and dead seedlings, affecting the main quantity and quality, so it has been rarely used in production, and the whole potato sowing is the most.

(2) budding treatment. In order to break dormancy and promote germination, hormone treatment must be done first. Because the whole potato has complete epidermis protection, it is not easy to absorb gibberellin, so the concentration of the solution should be high, so the varieties with short dormant period should be soaked with 2-5PPm gibberellin for 0.5-1 hour, and then buried in the wet sand bed to accelerate germination.

The sand bed should be located in the shady and ventilated place, covered with wet sand of 10 cm, one layer of seed potato and one layer of sand, and 3 layers of 4 layers. After 10 mi for 15 days, the buds can be sown when the buds grow to about 2 cm: or do not sow for the time being, put them under astigmatism and green for 2 days before sowing.

3 sowing seeds. When sowing in autumn, we should not only properly water down the temperature, but also consider drainage and waterlogging prevention. In order to create a field environment with low soil temperature, shallow sowing and large ridges are generally adopted, that is, shallow sowing, and then cultivating the soil into triangular ridges. The bottom of the ridge is about 40 cm wide and the ridge is 30 cm high. The potato pieces should be planted with large ridges, and the seed potatoes should be covered with soil about 12 centimeters. Sowing on the shady slope of such a large ridge has the advantages of preventing hot sun exposure, being convenient for drainage and not hardening after watering, and is also conducive to cooling, preserving soil moisture and breathable. Sowing density: 60 × 20 cm of cut pieces and 65 × 25 cm of small whole potatoes. Sowing is best carried out on a cloudy day, and the hot noon should be avoided when sowing on a clear day.

4Field management. After sowing, water continuously and keep the ridge moist until the seedlings emerge. Because the sunshine in autumn is short, it is suitable for tuber growth, and the plant is early and not easy to grow, so it should be promoted mainly in management. Early stage must be small frequent watering, early topdressing, to promote early growth, rapid growth, and combined with ploughing and weeding, to cultivate the soil by stages. When the temperature decreases in the later stage, irrigation should be reduced, and the soil should be thickened gradually to protect the tuber. In the early and middle of November, the stems and leaves were harvested after death by frost.