After the tomato enters the flowering stage, the absorption of nitrogen, phosphorus and potassium by the plants is greatly increased, and the nitrogen fertilizer content in the soil is reduced. Therefore, nitrogen fertilizer must be topdressed.
When the first fruit of the tomato grows to the size of the walnut, it is necessary to add nitrogen fertilizer to the soil in time. At this time, nitrogen fertilizer can be applied 24~36 kg per mu. When the second fruit of the tomato grows to the size of a walnut, and begins to expand rapidly, it is necessary to carry out the second dressing, applying 40 to 45 kg of nitrogen fertilizer per mu. When the third ear of tomatoes enters the rapid expansion phase, the third dressing is performed. When the fourth fruit of the tomato enters the rapid expansion stage, the last topdressing is performed. At this time, the growth amount of the plant begins to decrease, and the amount of nitrogen fertilizer used can be used in accordance with about 10% of the total amount of nitrogen fertilizer.
Special attention is paid to the fact that vegetable growers can dissolve nitrogenous fertilizers in advance with warm water and then flush them with water, or they can directly apply water-soluble fertilizers, but they should use them according to their nitrogen fertilizer content. Http://Content/805f6bdb-ff59-4a05-bffe-9fc0359e8dd7?cType=2
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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