Winter sowing potatoes in the southern region are generally sown in late December to mid-January of the following year. The varieties covered include mulching white mulberry, seed potato 1, seed potato 5 and so on. In order to enable the potato to achieve high yield, stable production, and high quality, the following points should be noted in the application of fertilizers:
To clarify the characteristics of potatoes need fertilizer First, the shorter growth period, the growth of fast, the absorption of nutrients faster; Second, the large demand for fertilizer, fertilizer, and more; Third, the nutritional requirements of a comprehensive response to the lack of sensitivity. Therefore, in the application of fertilizers, organic fertilizers should be the main, supplemented by chemical fertilizers; full base fertilizers, early application of top dressings, and more potassium fertilizer.
We must learn to identify physiological diseases. Diseases caused by invasion of bacteria include late blight, bacterial wilt, and viral diseases. However, due to low temperatures during the winter (spring) sowing period, the incidence is generally lighter. However, the physiological diseases caused by improper fertilization are It often happens. If nitrogen is not enough, the potato will grow slowly, the leaf color will fade after the first fade, the lower leaf will wither, the leaf area will be stretched, the tuber will be small, and the yield will be low. If nitrogen is too much, the leaves will grow long and the stem base will be weak and susceptible to disease or lodging. Such as lack of phosphate fertilizer, thin plants, slightly curled leaves, potato pieces of carbohydrate content decreased, prone to hollow, potato block rust color spots, difficult to cook. Such as lack of potash, plant stalk dwarf was clustered, some curved, short internodes, leaf color was dark green after copper, some leaf margin scorch, veins subsidence, potato shape became longer spindle, meaty gray black . Boron-deficient plants are degraded and have cracked patterns.
To scientifically formulate basal fertilizer According to the determination of the agricultural scientific research department, to produce 500 kilograms of potatoes, it is necessary to absorb 1.75-3.0 kg of nitrogen, 0.9-1.5 kg of phosphorus pentoxide and 3.95-6.0 kg of potassium oxide from the soil. To achieve high yields of potatoes, it is necessary to adhere to balanced formula fertilization, in which the application rate of base fertilizer accounts for 60%-70%. In terms of specific operations, 250,000 kilograms of farmyard manure should be applied per acre, with 15-20 kilograms of urea, 25-40 kilograms of phosphate fertilizer, 20-25 kilograms of potassium sulfate, or a compound fertilizer with a corresponding content. The farmhouse fertilizer is insufficient to apply 100-150 kg of bio-organic fertilizer per acre. According to the growth of the seedlings, it will be topped up 2-3 times. In the flowering period, 0.2% Sonic Boron solution can be sprayed out of the root, and 1% potassium sulfate and 0.2%-0.3% potassium dihydrogen phosphate solution can be sprayed later.
Vitamins are a type of trace organic substances that humans and animals must obtain from food in order to maintain normal physiological functions. In terms of physiological functions, vitamins are neither a raw material for tissues nor a substance for supplying energy, but they are an indispensable substance for the body. It has many types and different chemical structures. Most of them are the components of the coenzyme (or prosthetic group) of certain enzymes. They are the indispensable compounds for maintaining the normal growth (growth, health, reproduction and production function) of the body. It plays a catalytic role in the body to promote the synthesis and degradation of major nutrients (proteins, fats, carbohydrates, etc.), thereby controlling metabolism. Vitamins are essentially low-molecular organic compounds. They cannot be synthesized in the body, or the amount synthesized is difficult to meet the needs of the body, so they must be supplied from the outside. The daily requirement of vitamins is very small (usually measured in milligrams or micrograms). They are neither a raw material for body tissues nor a substance for energy supply in the body. However, they do not regulate material metabolism, promote growth and development, and maintain physiological functions.
Vitamin K2 MK-7, Vitamin C, Vitamin E, Vitamin K2, Vitamin H, Vitamin D3
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