Potato growth process must supply enough water to get high yield. The potato water demand and environmental conditions are closely related and complex. In particular with the potato leaf photosynthesis and transpiration, the plant's climatic conditions, soil type, soil organic matter content, application of fertilizer type and quantity as well as field management, plant varieties and so on, have a great relationship. The results show that potato plants manufacture 1 kg of dry matter for each of about 708 liters of water consumption. At loam on potato plant, the production of 1 kg of dry matter of the minimum required 666 liters of water, the maximum 1068 liters, and in the sandy soil of the potato plant to be 1046 ~ 1228 liters of water. General production of 2000 kilograms per mu tubers, according to the Department of aboveground and underground weight of 1:1 and 20% dry weight basis, per acre water requirement of 280 tons. Potato growth process up to a period of water demand are pregnant bud to flowering, full flowering stage of growth of stems and leaves reached a peak. The period of water shortage will affect the plant development and yield. Stems and leaves from flowering to stop growing, this time the largest city of stem growth, plants on the water requirements is also a great, if the water shortage will impede the delivery of nutrients to the tuber.
On the other hand, potato needed for growth of inorganic elements have to be dissolved in water before the full absorption. If the soil is short of water, more nutrients, plants can not use. Similarly, plant photosynthesis and respiration moment can not be separated from water, such as water shortage, only the impact of nutrients in the manufacture and operation, but will also cause leaf wilt, tuber production. Therefore, there is usually enough to maintain soil moisture is an important condition for high-yield potato. Soil moisture is usually maintained at 60% -80% more appropriate. Soil moisture over 80% of plant growth will have an adverse effect, especially in the late excessive soil moisture or water more than 24 hours, perishable tubers. Water more than 30 hours tubers substantial decay, more than 42 hours after all rot away. Therefore, in low-lying land for planting potato should pay attention to drainage and cultivation of a high ridge.
On the other hand, potato needed for growth of inorganic elements have to be dissolved in water before the full absorption. If the soil is short of water, more nutrients, plants can not use. Similarly, plant photosynthesis and respiration moment can not be separated from water, such as water shortage, only the impact of nutrients in the manufacture and operation, but will also cause leaf wilt, tuber production. Therefore, there is usually enough to maintain soil moisture is an important condition for high-yield potato. Soil moisture is usually maintained at 60% -80% more appropriate. Soil moisture over 80% of plant growth will have an adverse effect, especially in the late excessive soil moisture or water more than 24 hours, perishable tubers. Water more than 30 hours tubers substantial decay, more than 42 hours after all rot away. Therefore, in low-lying land for planting potato should pay attention to drainage and cultivation of a high ridge.