1. Fertility requirements Potatoes are vegetables made from underground tubers rich in carbohydrates. Potatoes prefer cool, mild climates and are light tolerant. Therefore, they have a wide range of cultivation and are used for both food and grain production and starch, alcohol, and other uses.
Potatoes' primary roots and Portuguese roots need to absorb various nutrients. It absorbs nutrients with the greatest potassium uptake, followed by nitrogen and phosphorus, which is a kind of potassium-stimulating vegetable. As the potato growth period increases, the absorption rate of nutrients also increases. At the seedling stage, the absorption of nutrients was less, which was less than 10% of the total amount of the whole growth period; the nitrogen, phosphorus and potassium absorption rate of the hair growth period accounted for about 30%; more than half of the nutrients were absorbed during the potato stage. Therefore, supplying sufficient nitrogen at the seedling stage and hair growth stage plays an important role in ensuring the robust growth of the roots, stems and leaves in the early stage. While sufficient potassium nutrition can promote starch synthesis, there is a significant effect on tuber enlargement.
2. Fertilization Techniques Potatoes are fibrous roots and require moderate soil temperature and good ventilation. In general, it is appropriate to choose loose, fertile, well ventilated, and deep sandy soil for cultivation. The fertilization technology features are:
First, apply basal fertilizer. Decomposed high-quality organic fertilizers should be used. Generally, about 75,000 kilograms are applied per hectare, combined with deep plowing and ridging before site preparation. In addition to the application of organic fertilizers, some phosphorus and potassium (or arborium) fertilizers may be applied at the sowing points or in the trenches for sowing. Generally, 150-225 kg of diammonium phosphate or 225 kg of ternary compound fertilizer is applied per hectare, or Depending on soil fertility, lay a good foundation for high potato yield.
Followed by early fertilizer. Normally nitrogen fertilizers are applied to the seedlings (after seedlings) and watering is used in combination. The topdressing amount is 50% of the amount of nitrogen fertilizer. Its purpose is to promote the growth of stems and leaves and enlarge the assimilation area. The remaining nitrogen fertilizer should be applied at the early stage of hair growth. In the late stage of hair growth, in order to promote tuber enlargement and increase yield, potassium fertilizer (or plant ash) can be applied once. It is worth noting that scientific fertilization and management to coordinate the growth of shoots and shoots in the ground and the enlargement of tubers in the underground are the key technologies for high potato yield.
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