Detailed Explanation of Key Techniques for High-Yield Potato Cultivation

Potato cultivation techniques vary depending on geographical and climatic conditions. It is mainly propagated asexually using tubers. To avoid virus transmission through the cutting knife (spindle tuber, X and S mosaic viruses) and ring rot, healthy seed potatoes with a diameter of 3-3.5 cm should be selected for whole-tuber sowing.

When propagated asexually using tubers, seed potatoes can germinate and grow at a soil temperature of 5-8°C, with the optimum temperature being 15-20°C. The suitable air temperature for plant stem and leaf growth and flowering is 16-22°C. The optimum night air temperature for tuber formation is 10-13°C (soil temperature 16-18°C), and formation slows when it exceeds 20°C. During emergence and the seedling stage, plants suffer frost damage when the air temperature drops to -2°C.

Sowing

When propagating by tubers, cut the potatoes into pieces according to the buds, sow in ridges, and sow in March. When the average temperature exceeds 25°C, underground tubers stop expanding. They will mature in about three months.

Sow early at the right time: Prepare the land, apply fertilizer, and sow early at the right time, so that the entire growth period of the potato is in a relatively cool season with lower air temperatures, allowing tuber formation and expansion to avoid the high-temperature period.

Note that the hilling depth should generally not be less than 12 cm. If the soil covering at sowing is insufficient, hill the soil 1-2 times as the seedlings grow after emergence. If the soil cover is too thin, the soil temperature fluctuates sharply, and stolons are prone to emerging above the ground.

Field Management

The potato plant is divided into aboveground and underground parts. The aboveground part has aboveground stems, pinnately compound leaves, flower buds and fruits; the underground part has underground stems, roots, stolons and tubers.

Whether the aboveground part produces fruit depends on the variety and external environmental conditions. The same variety will be affected in whether it flowers and fruits in different years and when planted at different times in the same year.

The product obtained from cultivating potatoes is the tubers produced underground. Tubers are formed by the swelling of the tips of stolons, and they have many characteristics of aboveground stems.

It can be said that there is no essential difference among stolons, tubers and aboveground stems, and under certain environmental conditions they can transform into each other.

Fertilization

For potato fertilization, the general principle is "organic fertilizer as the main input, chemical fertilizer as a supplement, heavy application of base fertilizer, and early application of topdressing."

Pay attention to management in the later stage and promptly prevent the occurrence of pests and diseases.