I. Definition of humic acid fertilizer Refers to the use of peat, lignite, weathered coal as raw materials, using different methods of production, to produce products containing large amounts of humic acid and crop growth, development of nitrogen, phosphorus, potassium and some trace elements. The varieties of humic acid fertilizers include ammonium humate, ammonium humuvate, humic acid, ammonium humate, sodium humate, and potassium humate. The role of humic acid fertilizers in agricultural production is mainly to stimulate crop growth, improve soil, increase nutrients, and strengthen soil microbial activities. Second, humic acid fertilizer application method and dosage 1. Seed soaking can improve seed germination rate, early emergence, and enhance the ability of seedlings to root. The general soaking concentration is 0.005% to 0.05%, the general soaking time is 5 to 10 hours, and the hard-shelled seeds such as rice and cotton are 24 hours. 2, dip root, roots of rice, sweet potato, etc. before transplanting can use humic acid sodium or potassium humate soaking seedlings, the concentration of 0.01%? 0.05%. After soaking, it shows fast rooting and high survival rate. 4, as a basal solid humic acid fertilizer (such as ammonium humate, etc.), generally 100-150 kg per 667 square meters. When the humic acid solution is used as the base fertilizer, the concentration is 0.05% to 0.1%, and 250 to 400 liters of water per 667 square meters can be mixed with the farm fertilizer, and the furrow application or hole application can be applied. 5. For topdressing Before the seedling and heading stages of crops, apply about 250 liters of a 0.01%?0.1% aqueous solution per 667 square meters, and water it near the root of the crop. Paddy field can be applied with water or splashed on the surface of the water, which can play a role in raising seedlings, strong seedlings, and promoting growth and development.
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3, the general concentration of external spray is 0.01%? 0.05% solution, sprayed at the flowering period of 2-3 times, no 667 square meters each spray volume of 50 liters of water, spray time should be selected in the afternoon 2 to 4 when the effect is good . 