The stem of potato is divided into two parts: aboveground stem and underground stem. Underground stems are fruits with blocky stems, oblate or spherical stems, and hairless or sparse hairs. The stems on the ground are rhombic and hairy. Primary leaves are simple and intact. With the growth of plants, odd-numbered and unequal-length pinnate compound leaves are gradually formed.
The habit of potatoes
Potato likes to be cold and cool, and it is a crop that likes low temperature. The formation and growth of underground potato requires a loose, breathable, cool and moist soil environment. Requirements for temperature: the optimum temperature for tuber growth is 16℃~ 18℃, and when the local temperature is higher than 25℃, tuber growth stops; The optimum temperature for stem and leaf growth is 15℃~25℃, and it will stop growing when it exceeds 39℃.
Too long dormancy period of potato will affect sowing date, emergence and yield, so it is required that seed potato must go through dormancy period when sowing. If the seed potato is still dormant during the sowing season, corresponding measures must be taken to break the dormancy. There are chemical and physical methods to break the dormancy of potato tuber.