The demand for NPK in potato is equally important. In the process of yield formation, N supply is the basis, which can ensure the formation of enough green leaf area for photosynthesis; the supply of phosphorus is also indispensable for tuber formation and starch accumulation; On the basis of sufficient nitrogen and phosphorus, the supply of potassium is necessary for the assimilation of carbohydrates in the early stage and the transportation from the ground to underground tubers and starch accumulation in the later period. Perching Stool Pu Padded ,Perching Stool Pvc Padded ,Perching Stool Height ,Perching Stool With Pvc Padded Active Life Healthcare Co.,Ltd , https://www.alh-med.com
Field tests showed that the ratio of N, P and K uptake by potatoes was about 1:0.5:2.5. According to this demand feature, the potato in the industry was called as a potassium-loving crop. However, when making actual fertilization decisions in agricultural production, it is necessary to take into account the supply of soil nutrients to potato nutrient needs, and also to take into account the different supply levels of N, P, and K in the soil, and to recommend nitrogen on the basis of soil supply. Phosphorus and Potassium fertilizer application amount. For example, in the south, the effective potassium content in the soil is low, and potassium fertilizer should be widely applied to balance the fertilization of nitrogen, phosphorus and potassium. The effective potassium content in the northern soil is higher than in the south. The application of potassium fertilizer in food crops is not common, but potassium is needed for potatoes. Characteristics, it is necessary to add potassium fertilizer. It is suggested that the appropriate ratio of nitrogen, phosphorus and potassium fertilizers is 1:0.5:0.6 in the north and 1:0.4:0.8 in the south. Assuming that the potato yield per mu is about 1500 kg, the recommended amount of nitrogen fertilizer is 10-12 kg/mu pure nitrogen, 5-8 kg/mu pure potassium fertilizer, and 3-5 kg/mu pure phosphate fertilizer.
In the period, method and distribution of potato fertilization, base fertilizer and top dressing are used. The basal fertilizer is best applied with organic fertilizers and fertilizers to facilitate the tuber. The distribution of N, P, and K fertilizers in basal and topdressing fertilizers is different, and only 50% of nitrogen fertilizers, all phosphate fertilizers, and most of potassium fertilizers are distributed in basic basal fertilizers. Half of the nitrogen and potassium fertilizers can also be used as base fertilizers, and the other half can be top-dressed. The base fertilizer fertilizers can be selected from compound fertilizers containing high phosphorus and potassium (such as 12%-15%) and nitrogen (approx. 10%). Single fertilizer can also be used with. Elemental phosphorus is the best calcium, the southern acidic soil area is also optional calcium magnesium phosphate fertilizer. Phosphorus fertilizer distribution principle is that most of the ridge before the squat or burr deep applied to the ridge bottom, a small part of the phosphorus fertilizer potato block when applied under the slope. The topdressing nitrogen and potash fertilizer should be topdressed at the bud stage (that is, the underground tuber formation period), applied to the ridge side and then watered by the cover soil. Top dressing time is not too early, it is best to enter the expansion period in the potato block, too early to catch fertilizer in particular, in pursuit of a large number of nitrogen fertilizer, will cause the roots of the ground to prosper the problem of small pieces of potato roots. In the fertilization position, the basal fertilizer is planted or planted before planting, and the depth is about 15-20 cm. Top dressings are applied between the rows or the side of the plant. The fertilizer is buried at a depth of 5-8 cm. After fertilization, it can be filled with water and covered with soil.
In recent years, some farmers in actual production have paid much attention to the application of nitrogen fertilizer in order to obtain high yields of potatoes. The application amount of nitrogen fertilizer is high in both base fertilizer and top dressing. With fewer and fewer organic fertilizers, the need for rapid potato production cannot be guaranteed. More and more farmers rely mainly on fertilizers to produce potatoes. Partial application of nitrogenous fertilizer sometimes results in the growth of the aerial parts of the yam, and the underground potato chips have very few adverse consequences. Many rural households have already mastered related technologies. For example, in some potato production households in Gansu and Inner Mongolia, organic fertilizers are mainly used as base fertilizers with low-concentration compound fertilizers, and then to the buds at the top of the plants, and then fertilized with appropriate amount of nitrogen fertilizer, the results are good. Based on the nutritional characteristics of the potato and the ratio of N, P, and K nutrients, a feasible technique for balanced fertilization in the whole process.
In addition, the potato is sensitive to trace elements such as boron and zinc, and can be supplied in an appropriate amount through seedbed fertilization and extra-root fertilizer.