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Humic acid fertilizer use and precautions
[2018-12-4]
Humic acid fertilizer is a new type of fertilizer containing humic acids. The main types are humic acids, nitro-humic acids and purified humic acids. The former two are mostly made up of humic acid compound fertilizers with nitrogen, phosphorus, potassium and trace elements, and are mainly used as base fertilizers. Purification of humic acid is mainly used to water or spray crops as a growth regulator. It can also be used as a seed soaking, which can increase the germination rate and cultivate strong seedlings.
1. Usage. 1 base fertilizer. Use 300-400 kg of humic acid containing 0.02% to 0.05% of humic acid to mix with farmyard manure, or ditch and dig the pit. Paddy fields can be combined with land preparation irrigation.
2 topdressing. At the seedling stage and heading stage, 250 kg of humic acid containing 0.01% to 0.1% aqueous solution per acre, watering in the vicinity of the root system (not touching the root system), application of sodium humate or potassium humate in the paddy field, can be applied with water Or pouring, raising seedlings, strong ears, promoting growth and development.
3 external sprays. From the late stage of flowering to the early stage of grain filling, the roots are sprayed two or three times, and each time a spray of 50-75 kg of humic acid containing 0.01%-0.05% aqueous solution can make the grain full, increase 1000-grain weight and reduce the openness. Spraying at 2 to 6 pm is good.
4 soaking seeds. Seeds are soaked in an aqueous solution containing 0.01% to 0.05% of humic acid, seeds such as vegetables and wheat are immersed for 5 to 10 hours, and rice, cotton, etc. are immersed for more than 24 hours. It can increase the germination rate, early emergence and enhance the rooting ability of seedlings.
5 roots, dip inserts. Rice, sweet potato, vegetables and other transplanted crops, before transplanting with 0.05% ~ 0.1% sodium humate, potassium humate solution soaked for several hours, or transplanted roots, soaked fruit tree cuttings. Hair roots are fast, increase secondary roots, shorten the slowing period, and increase the survival rate.
2. Precautions. Humic acid fertilizer is used as the base fertilizer and the seed fertilizer is better than the top dressing. It is better to concentrate the application than the application. The deep application is better than the shallow application. At the same time, ferment can not completely replace inorganic fertilizer and farmyard manure, and must be combined with chemical fertilizer and organic fertilizer application, especially with phosphorus fertilizer.
Different types of fertiliser materials have different input ratios, different manufacturing methods, and different nutrient contents. It is necessary to control the appropriate concentration when applying.
Potassium humate and sodium are hormone-based fertilizers. Pay attention to the temperature. After the application, the cold effect is slow, and the heat is effective. The general temperature needs to be effective for more than 18 hours. If the temperature is higher than 38 °C, it will accelerate the respiration of crops and reduce the accumulation of dry matter, resulting in reduced production. Stop application or reduce the number and dosage of application.
Ferulic acid fertilizers can only fully exert fertilizer efficiency if there is sufficient soil moisture and good irrigation conditions.
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