Potato watering is fastidious

Potato in the growth process, which stage should be less watering, which stage should be more watering, which stage should not be watered, is very particular, the following talk about this problem. Potato from seedling arch soil to flowering, generally do not water, squat seedlings, especially when the drought irrigation small water. Cultivation experts have done many comparative experiments in loam land with good water retention. The yield of potato seedlings under water control is 20%~25% higher than that without watering. Because water control squatting seedlings root volume equivalent to watering not squatting seedlings root volume of 2.5-3 times. Potato has a developed root system, in order to absorb more nutrients and water from the soil, synthesis and accumulation of more photosynthetic substances. Potato squatting seedlings can prevent excessive growth and consumption of nutrients, form short nodes, thick stems, thick leaves, short plants, develop into strong seedlings, and enhance the ability to resist wind and rain, lodging and diseases and insect pests. Potatoes begin watering at the beginning of flowering. From the first flower to the stop of stem and leaf growth, tuber growth is the largest, and the plant needs a lot of water. On the other hand, inorganic elements such as nitrogen, phosphorus and potassium needed for potato growth must be dissolved in water before they can be absorbed by the roots. If the soil is short of water, no matter how many nutrients there are, the plants cannot use them. The soil water holding capacity should be kept at 60%~80%. At this time, due to sufficient water, potato often causes excessive growth in the middle and late stages, consumption of nutrients and lodging, resulting in yield reduction. For this reason, chemical control must be implemented. When potato plant height was 50 cm ~55 cm, spraying 50 g 15% PP333 powder per mu and watering 4 days after spraying could obviously control height. Potato quality was improved and storage-resistant by stopping watering about 10 days before harvest.