Fertilization of basal-fertilizer potatoes is based on basal fertilizer, which generally accounts for 70% to 80% of the total amount of fertilizer. The basal fertilizers are often applied in combination with organic fertilizers and chemical fertilizers, and are applied in combination with soil preparation or casing. Basal fertilizer is based on the application of 2500-3000 kg of high-quality organic fertilizer per mu, and 60-80 kg of Mushu Luxi compound fertilizer. Due to the early growth of potatoes, there is more absorption of nitrogen and potassium nutrition. Furthermore, due to the low temperature in the early stage of the spring potato, the base fertilizer should be given enough nitrogen fertilizer, or it must be followed by nitrogen fertilizer to promote the early emergence of the potato seedlings. Therefore, nitrogen and potassium fertilizers should be re-applied under the premise of adequate phosphorus supplementation.
If it is not possible to fertilize the base fertilizer of the seed fertilizer, or if it is too late to apply fertilization, it is common to sow 15-20 kilograms of special compound fertilizer as a seed fertilizer. Fertilizer application is mainly carried out in the form of ditch application or hole application, but the fertilizer should not be in direct contact with seed potatoes to avoid burning seed potatoes.
Early application of topdressing N fertilizer should not be too late in topdressing, especially in the later period, in order to avoid stem and leaf lengthiness and affect tuber enlargement and quality. In the middle and late period, potassium fertilizer is the main ingredient. Can be divided into 2 to 3 applications, when the first seedlings for the first time, promote early-onset, increase photosynthesis area. At this time nitrogen fertilizer accounted for 30% of the amount of nitrogen applied, and potassium accounted for 20% of the total potassium application. The second topdressing during budding promotes the continuous growth of stems and leaves and increases the photosynthesis area, which is conducive to tuber enlargement. This dressing is generally applied to 20% of the total nitrogen application rate and 40% of the total application of potassium. Top dressing should be done in the afternoon and fertilizer should be kept away from the leaves. After flowering, it is generally no longer top-dressing. If the performance of defermentation and premature aging is shown in the later stage, phosphorus and potassium fertilizers may be used for the foliar application in combination with trace elements. In order to avoid causing some leggy on the ground, increase nutrient consumption. Topdressing with potassium fertilizer as the main, supplemented by nitrogen fertilizer, can effectively increase the photosynthetic area, promote tuber enlargement, and increase yield.
Appropriate root-fermenting potatoes also have a relatively large demand for micronutrients such as calcium, magnesium, sulfur, boron, and zinc. Therefore, in combination with the local soil fertility status and the growth status of potatoes, timely external root fertilization (generally refers to the foliage Fertilization) to increase potato resistance and yield. From the time when the potato seedlings start to leaf, the mixture of 0.1% magnesium sulfate, 0.3% potassium dihydrogen phosphate, and 1000 times triacontanol is applied once every 7 to 10 days, and the spray is sprayed 3 to 5 times, evenly. Wet leaf.
Supplementation of Magnesium Potatoes During the rapid expansion of potato underground tuber, 50-60 g of magnesium sulfate was applied to each plant, applied against fresh water or decomposed fecal water, or digging shallow ditch around the plants to promote the rapid expansion of underground tubers.
Avoid applying chlorine-based fertilizer to potatoes to avoid chlorine crops. Do not use potassium chloride and compound fertilizers containing chloride ions. Reasonable fertilization is a prerequisite for high yield and stability of potato production.
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