1 potato prefer to like light, because the potato is very like the light, so, it should have the moderate sunshine. it's fear the low light.the length of sunlight should be moderate, about 12 hours. the following condition are very good for potato.Seedling short day, light and proper temperature, tuber long day, light and proper temperature, tuber growth and accumulation of starch shorter day, light, proper temperature and larger temperature difference between day and night.
2.like cold weather,can not endure high temperature during growth in daily average temperature 17 ~ 21 ℃ is appropriate.germinationTemperature should be12 ~ 18 ℃, it's very suitable.Leaf growth requires a higher temperature to 20 ℃ is the most appropriate; Tuber expansion requires a lower temperature, the optimum soil temperature is 16 ~ 18 ℃.
3.like the dry climate, fear of wet weather potato Relative Humidity of 70% to 80% better.
4.Hi moist soil, dry afraid, afraid stains fat trees of soil moisture should be maintained at 70% to 80% maximum water holding capacity of the soil; later made to properly control the water supply of trees, soil moisture should be reduced to 60% to 80%; soil moisture tuber period should be increased to 80% to 85%.
5.Requirements to topsoil deep soil, loose structure, good ventilation and drainage soil rich in organic matter is the most suitable, in particular large porosity, aeration sandy loam cultivated potato, quick emergence, early tuber formation, tuber tidy , potato skin smooth, both high yield and starch content.
6. potato nutritional needs throughout the growing season to absorb most of potash, nitrogen, followed by phosphate least. Each producing about 1,000 kg of tubers absorb nitrogen from 5 to 6 kilograms of pure phosphorus from 1 to 3 kilograms of pure potassium 12 to 13 kg
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