(1) timely cultivating and weeding
With the growth of the potato, the weeds in the field also grow rapidly, and the potato competes for field nutrition, especially in the field without the film. This phenomenon is particularly prominent.
The potato weeds in the field mainly include the flowers, ash, borage, thorns and grass weeds, which can be manually removed. If necessary, DuPont Baocheng 25% dry suspending agent can be used for prevention and control. Use 25% DuPont Baocheng dry suspending agent per acre 5~7.5 g water 30-40 kg, and add 0.2% neutral detergent or detergent. Spraying the field stems and leaves is very effective in controlling annual grass weeds and broadleaf weeds.
(2) Topdressing loose soil
Potato is a crop that requires more fertilizer. In particular, it requires more potassium. The ratio of nitrogen:phosphorus:potassium is 4:8:12. Formulated fertilization is carried out by soil testing. In the dry farming area, it is necessary to combine loose soil, cultivating soil and ridges, and no-tillage cultivation should loosen the soil in time to increase soil permeability; irrigate the potato on the membrane to cover the soil in time to prevent burning, and the seedling height is about 20 cm. Covering the soil, preventing the potato from appearing and seeing the light turn green. Be careful not to damage the mulch when loosening the soil. When loosening soil, it can apply 1000 kg of high-quality farmyard manure or 20 kg of compound fertilizer, 10 kg of potash fertilizer or 150 kg of plant wood ash. At the flowering stage of the bud, the second top dressing is carried out depending on its growth. In the late growth stage, 60-75 kg of 0.3% potassium dihydrogen phosphate solution was used for the top dressing.
(3) Reasonable irrigation and drought resistance
In areas with irrigation conditions, it is necessary to irrigate 3-4 times during the flowering period and tuber expansion period of the potato, pay attention to the irrigation of the ridges, prevent the flooding of the large water, and do not fill the ridges. The soil water content should be kept at 60% throughout the growing season. ~ 80%, an appropriate amount of water in time of tuber formation, tuber expansion of water demand is not of critical water. In areas or seasons with heavy rain, drain in time and there should be no water in the field.
In order to ensure the stable and high yield of the potato, it is necessary to use artificial water to pour the seedlings or use the rainwater to water the land to reduce the drought.
(4) Foliar spray fertilizer, chemical regulation
Timely observation, whether before flowering leggy phenomenon, if leggy, can PP333 500mg / L, etc. control, spray Expansin potato tuber expansion period in the foliage, in favor of enlargement of the tubers, to increase production.
(5) Do a good job in pest control
During the occurrence of disease, there are some differences in species, but the main diseases are basically the same. Nothing more than early blight, late blight, ring rot, black shank, mosaic virus, leaf roll disease, bacterial wilt, Rhizoctonia solani caused by diseases such as mole, to timely prevention and treatment.
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