What is micro-fertilizer? How should I use it?

Micro-fertilizer refers to the fertilizer for plant trace elements, such as copper fertilizer, boron fertilizer, molybdenum fertilizer, manganese fertilizer, iron fertilizer, zinc fertilizer and so on, mainly some inorganic salts and oxides. Micro-fertilizer is widely used, from food crops to oil crops, cash crops, fruits, vegetables, etc., almost all crops have varying degrees of promotion.

What is micro-fertilizer?

Amino acid micro-fertilizer is an organic complex formed by chelating and complexing with plant amino acids as matrix, using its huge surface activity and adsorption capacity to add nutrients needed for plant growth and development, such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, etc. This kind of fertilizer can not only maintain the slow release and full utilization of a large number of elements, but also ensure the stable and long-term effect of trace elements. It can enhance plant respiration, improve plant redox process and promote plant metabolism.

Amino acid micro-fertilizer can promote photosynthesis and chlorophyll formation, and significantly promote and activate biochemical processes such as oxide activity, enzyme activity, seed germination, root growth and development.

Second, how to use micro-fertilizer?

1. Boron fertilizer

The crops that are sensitive to boron fertilizer are rape, sugar beet and so on. Boron fertilizer is often used as borax. Boron fertilizer is mainly sprayed, and it can also be used as base fertilizer and topdressing fertilizer, but generally not for seed treatment.

Kish. It is suitable for soils with severe and moderate boron deficiency. 0.5kg borax is used for 667 square meters. If boric acid is used, the amount of boric acid should be reduced by 1kg and 15kg, mixed with fine dry soil or fully mixed with nitrogen, phosphorus and potassium fertilizer. Strip application should be applied on one side of the seed and should not be in direct contact with the seed. The fertilizer effect can generally last for about 3 years.

Foliar spray. Generally, 0.1% concentration of boric acid is used, 0.2% concentration of borax is used (0.2%-0.3% concentration can be used for fruit trees), 667 square meters of fertilizer solution is used at a time of 50kg-70kg each time, and it is sprayed 2 times from the seedling stage to the peak growth period of the crop, each time at an interval of 7-10 days.

2. Zinc fertilizer

The crops that are sensitive to zinc fertilizer are rice, corn and so on. Zinc fertilizer is commonly used as zinc sulfate, which can be applied by basal application, topdressing, foliar spraying, seed dressing and seed soaking.

Kish. It is suitable for sowing pre-ploughed crops. 667 square meters (1 mu) zinc sulfate 1kg, mixed with fine dry soil (or organic fertilizer) 10kg, applied to the soil before sowing. Basic application has an after-effect and generally lasts for about 2 years.

Chase. 667 square meters with zinc sulfate 1 kg 1.5 kg, mixed with fine dry soil 10 kg, strip application or hole application from seedling to jointing stage.

Foliar spray. The foliar spraying concentration of zinc sulfate is 0.1%-0.3%. Wheat is 0.1%, corn is 0.2%, rice and fruit trees are 0.1% and 0.3%. Wheat was sprayed once at jointing stage and booting stage, corn was sprayed once at seedling stage and jointing stage, and the soil with serious zinc deficiency should be sprayed again at big trumpet stage. The amount of liquid spray is 667 square meters, 50kg and 75kg.

Mix seeds. Each kilogram of seeds is 4 grams of zinc sulfate. First, zinc sulfate is dissolved in water. Generally, the fertilizer solution accounts for 7% to 10% of the seed weight. It is sprayed evenly on the seeds, and the seeds are sown after being dried.

Soak the seeds. Millet seeds were soaked in 0.02% zinc sulfate 0.05% solution for 6 hours for 8 hours; rice seeds were soaked in clean water for 1 day, and then soaked in 0.1% zinc sulfate solution for 24 hours.

3. Molybdenum fertilizer

It is mainly used in legume crops such as soybeans, peanuts and wheat. Ammonium molybdate is commonly used as molybdenum fertilizer, which can be used for seed dressing, seed soaking and foliar spraying, but not as base fertilizer.

Mix seeds. One kilogram of ammonium molybdate is used for each kilogram of legume seeds, and the general fertilizer liquid accounts for 25% and 30% of the seed weight. If the solution is too much, it is easy to cause the seed coat to fall off and affect sowing and emergence. Ammonium molybdate must be dissolved in hot water before it can be used.

Soak the seeds. It is not suitable for large seeds such as peanuts and soybeans, but for rice, cotton and green manure seeds. Generally soak the seeds with 0.05%-0.10% ammonium molybdate solution, the weight ratio of the seeds to the solution is 1 ∶ 1, soak for 12 hours, and then sow the seeds after being dried.