Humic acid fertilizerIt is a general term for fertilizers containing various humic acids, mainly using charcoal, lignite, etc. as the main raw materials, which are extracted, concentrated or converted into water-soluble fertilizers containing nutrients through a certain process. For example, adding sodium hydroxide rich in humic acid raw materials , made of sodium humate. Sulfuric acid is added to make humic acid. It contains humic acid raw materials, and nitric acid is added to make nitro humic acid. Potassium hydroxide can be added to make potassium nitro humate. Ammonia treatment; adding humic acid when producing compound fertilizers or adding nutrient elements and humic acid when producing basic fertilizers to make humic acid compound fertilizers, etc.

rightHumic acid fertilizerThe choice is mainly based on the following points

First of all, choose humic acid fertilizer according to the trial method. When used as Zhongxi, drip irrigation or foliar spraying, it is recommended to use potassium humate, ammonium humate or potassium fulvic acid, ammonium fulvic acid. When used as base fertilizer, it is best to use Choose fertilizers such as humic acid or nitro humic acid, which should be buried in the soil when applied. Humic acid is the product of the combination of humic acid and bicarbonate, so it is easy to volatilize. It is not recommended to use insects or mesophyll. In addition, do not Use sodium humate in soils with a higher pH (saline).

Secondly, choose humic acid fertilizers according to crop preferences and growth nodes. Taking fruit trees as an example, fertilizers in autumn should focus on phosphorus fertilizers, potassium fertilizers and fertilizers in spring, germination and differentiation should focus on phosphorus fertilizers and potassium fertilizers, and nitrogen fertilizers and potassium fertilizers should be applied when fruits expand. , calcium fertilizer, micro-fertilizer. Fertilize according to the preferences of crops. For example, fruit trees, eggplant vegetables, tobacco, sugarcane, etc. are dilute potassium crops, and the use of potassium humate fertilizer is the best.

Finally, humic acid fertilizers are selected according to the type of crops and the cost. Humic acid fertilizers are divided into humic acid simple fertilizers, humic acid compound fertilizers, humic acid organic fertilizers, humic acid organic-inorganic compound fertilizers, humic acid organic-inorganic compound fertilizers, and trace amounts of humic acid according to the type and quantity of nutrients. Elemental fertilizers, etc.

selection of field cropsHumic acid fertilizer(Mixed), easy to use and cost-effective. Vegetables and fruit trees can choose humic acid organic fertilizer, humic acid organic-inorganic compound fertilizer or humic acid trace element fertilizer, the organic matter in these fertilizers reaches 20% 45% , which can effectively improve the taste and color of crops. When spraying Zhongxi or foliage, it is best to choose a water-soluble fertilizer containing humic acid or yellow busan. This fertilizer is expensive, but it has fast effect and good effect, so it is often used in Economic crops with high value. Humic acid can be used for the entire growth period of crops, but for economic reasons, after crop transplantation, before flowers, expansion, color and lustre 4 important periods, respectively 1 or 2 times, expansion period and reincarnation The combined spraying effect of the period may be better.