Organic bio-composite fertilizer is the preferred fertilizer for the production of pollution-free crops, and its improper use will not naturally achieve the desired effect. Taking the “Jinkaofeng†brand organic bio-composite fertilizer developed and produced by Quantan Keonong Technology Development Co., Ltd. as an example, the reader is introduced about its usage. First, the amount of fertilizer: Biological compound fertilizer is mild, and generally does not produce fertilizer damage, but taking into account the economic benefits of fertilizer input, should be appropriate to control its dosage. The basic principle for the calculation of the amount of use is: input per mu and normal fertilizer (or slightly lower). According to the current application rate of chemical fertilizers per acre in various parts of the country, the application amount of each fertilizer per mu is 50-150 kilograms; for field crops 50-120 kilograms per kilogram, the fruit trees can be planted according to the age of trees and fruit production, each tree Apply 1-20 kg. Second, the depth of fertilization. Field crops are generally 5-15 cm. The depth of fertilization is mainly determined by the following three aspects: (1) Crop varieties. The shallow root system should be shallow and the deep root system should be deeper. (2) Soil types. Poor soil permeability of the application of some shallow, loose soil permeability is good to deepen some. (3) The degree of soil moisture. The water can be lighter and the drought-prone soil should be deeper. Third, fertilization method (1) Do not use direct seed dressing, as base fertilizer, do not touch the seeds. (2) It can be used as a base fertilizer or as a top-dressing fertilizer. In the cold season, it is better to use basal fertilizer as early as possible. Generally, it is better to plant 3-5 days before sowing or transplanting, and keep the soil moist. Otherwise, fertilizer efficiency will not be quick enough for quick fertilizer. (3) For crops growing for more than 2 months, they should be applied in batches, once every 30-60 days, and the top dressing dosage should not be less than 20 kg per acre. The last topdressing (increased application rate) should be applied 20 days before harvesting. (4) Various methods can be applied such as spreading, spraying, acupuncture, etc., but the effect of concentrated application is better (without direct contact with seeds). (5) The fruit trees can be uniformly distributed in a suitable position within the canopy drip line. (6) Be sure to cover the soil after fertilization. The depth of soil cover is the depth of fertilization. It is necessary to water as soon as possible after the fertilization is buried, otherwise the fertilizer effect cannot be played in time. (7) A small amount of chemical fertilizer can be applied throughout the growing season. This is also in line with China's basic guidelines for the coordinated application of organic and inorganic fertilizers. (8) When top dressing, the fertilizer can be directly dissolved in water and the water can be directly rooted. The effect is even better. “Jinkafeng†brand organic bio-composite fertilizer is produced by using Shanghai's bio-engineering technology and advanced technology of high-temperature biochemical fermentation, which is widely used in the production of potash, zeolite, humic acid and other organic resources. Special fertilizer two series, a total of more than 10 kinds of products. Fertilizers are rich in fertilizer and have significant fertilizer effects. They are widely used in rice, corn, tea, tobacco, rapeseed, pepper, sericulture, artichokes, vegetables, fruits, and other crops, with an increase in yield of 15-30%. It is an ideal fertilizer for the production of green, pollution-free and organic agricultural products. It has the functions of improving soil, keeping water and drought, and suppressing pests and diseases.