Rational Fertilization-two

- May 14, 2019-

Instructions:

(1) Nitrogen fertilizer: Common fertilizers include urea, ammonium sulfate and ammonium nitrate. They are the main source of fertilizer for supplying available nitrogen and one of the main elements of plant protein synthesis. When used, it can be formulated into a solution with a concentration of less than 0.1%. Too much will cause the plants to dehydrate and die.

(2) Phosphorus fertilizer: Superphosphate and phosphate rock are one of the sources of phosphorus, which contribute to flower bud differentiation, strengthen plant roots, and increase plant cold resistance. Their fertilizer efficiency is slower, and they are less used in potted flowers. The phosphorus in flower cultivation is often obtained by applying compound phosphate fertilizer. When superphosphate is used as top dressing, add water 50-100 times first, soak it for one night and then take the above clear liquid to water.

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(3) Potassium fertilizer: Potassium is the main element of the ash that constitutes plants. Potassium can enhance the plant's resistance and disease resistance, and is one of the indispensable elements of plants. Commonly used potassium fertilizers are potassium chloride and potassium sulfate, which can be formulated into a solution with a concentration of less than 0.1%.

(4) Compound fertilizer: There are many types of compound fertilizers, and it refers to chemical fertilizers containing three elements of nitrogen, phosphorus and potassium or two of them. Common potassium dihydrogen phosphate, Russian compound fertilizer, diammonium, etc., can be formulated into an aqueous solution having a concentration of 0.1% to 0.2% during the application. Various fertilizer manufacturers have also introduced some special fertilizers for flowers, such as special fertilizer for foliage flowers, special fertilizer for woody flowers, special fertilizer for herbal flowers, special fertilizer for acid soil flowers, special fertilizer for cactus and special fertilizer for bonsai, which are available in the flower market. , just follow the instructions.

(5) Trace elements: trace elements need less dosage during plant development. Under normal circumstances, the trace elements contained in the soil are sufficient for the growth of flower plants, but some plants show chlorosis due to lack of trace elements during the growth process. , variegated leaves and other phenomena. For example, the iron deficiency in flowers is chlorotic; the boron deficiency is characterized by the growth of the terminal buds, the dwarfing of the plants, and the decrease of the leaf shape; the zinc deficiency is characterized by chlorosis and lobular disease. Application concentration: the spraying concentration of boron fertilizer is 0.1%-0.25%, the spraying concentration of zinc fertilizer is 0.05-0.2%, the spraying of molybdenum fertilizer is 0.02%-0.05%, and the spraying concentration of iron fertilizer is 0.2%-0.5%. The concentration of manganese fertilizer sprayed is 0.05%-0.1%.

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