Introduction to Organic-Inorganic Compound Fertilizers
Organic-inorganic compound fertilizer is an outstanding product of modern fertilizer industry. It successfully integrates the long-lasting soil improvement advantage of organic fertilizer with the fast-acting and high-concentration characteristics of inorganic chemical fertilizer, forming a highly efficient fertilizer with complementary advantages. Its core design concept is to promote both "quick-acting nourishment" and "long-lasting soil improvement" simultaneously.

The specifications you provided (OM≥10%, 8-8-8, 13-6-6) precisely define the typical features of this type of product.

In-depth interpretation of specification parameters
OM ≥ 10%

This organic matter content is one of the basic requirements for such fertilizers stipulated by the national standards. It ensures that the product not only provides nutrients but also has a basic soil improvement function. Although it is not as powerful as pure organic fertilizer in soil improvement, it can continuously provide carbon sources for soil microorganisms, gradually improve the physical structure of the soil, and prevent soil compaction caused by the sole use of chemical fertilizers.

Nitrogen, phosphorus and potassium ratio (8-8-8 and 13-6-6) :

8-8-8: This is a classic balanced formula. The contents of nitrogen, phosphorus and potassium are equal, providing comprehensive and balanced nutrition. It is suitable for the entire growth cycle of crops, especially when used as base fertilizer, it can lay a solid foundation for the early growth of crops and ensure the coordinated development of roots, stems and leaves. It is widely used in field crops, fruit trees and vegetables.

13-6-6: This is a typical high-nitrogen formula. It contains a higher proportion of nitrogen, focusing on promoting the vegetative growth of plants (such as stem and leaf growth, tillering), while also taking into account phosphorus and potassium to strengthen the root system and enhance resistance. It is particularly suitable for use as top dressing during the seedling stage, for leafy vegetable crops, or when rapid seedling lifting and tree vigor restoration are required.

2. Core Composition and Mechanism of Action
"Inorganic" part (chemical nutrients) :

It is mainly composed of fast-acting nitrogen, phosphorus and potassium compounds (such as urea, ammonium phosphate, potassium chloride, etc.)

Function: Provide the nutrients that crops urgently need and can quickly absorb during their critical growth period, ensure the early effect of the fertilizer, and prevent crops from becoming weak due to lack of fertilizer.

"Organic" section (organic matter) :

It comes from well-rotted farmyard manure, straw, kitchen waste, industrial organic waste, etc.

Function

Soil improvement: Increase soil organic matter, promote the formation of aggregate structure, and enhance water and nutrient retention capacity.

Activated nutrients: The organic acids produced by the decomposition of organic matter can activate the fixed phosphorus, potassium and trace elements in the soil, improving the utilization rate of fertilizers.

Slow-release fertilizer retention: Organic matter has a certain adsorption and fixation effect on the nutrients of chemical fertilizers, which can reduce the loss of nutrients (such as the volatilization of nitrogen, the fixation of phosphorus, and the leaching of potassium), making the fertilizer effect more lasting and stable.

Synergistic enhancement mechanism: The organic and inorganic components do not work in isolation in the soil. Organic matter provides food for microorganisms, and the activities of microorganisms in turn promote the decomposition of organic matter and the transformation of nutrients in chemical fertilizers, forming a virtuous micro-ecological cycle and achieving a synergistic effect of "1+1 > 2".

3. Main Functions and Advantages
Rapid and long-lasting fertilizer effect: It overcomes the one-sided shortcomings of slow fertilizer effect of pure organic fertilizer and short fertilizer effect of pure chemical fertilizer, meeting the current needs of crops while providing subsequent support.

Significantly enhance fertilizer utilization rate: Through the protection of organic matter, the fixation and loss of nutrients are reduced. Generally, the utilization rate is 10-15% higher than that of applying the same amount of chemical fertilizer alone, which means that it can reduce fertilizer use while increasing efficiency.

Improving soil quality and enhancing soil fertility: Continuous use can fundamentally improve the physical and chemical properties of the soil and alleviate problems such as compaction, acidification, and salinization.

Improving crop quality: Balanced nutrient supply and a healthy soil environment help increase the sugar content and vitamin content of fruits, improve their appearance, and enhance the commercial value of agricultural products.

Easy to apply, labor-saving: The granular form is convenient for mechanical or manual scattering, and one application can simultaneously supplement organic matter and chemical nutrients.

4. Applicable crops and application recommendations
Applicable crops: It is almost applicable to all crops, including rice, wheat, corn and other field crops. Fruit trees such as apples, citrus fruits and grapes; Vegetables such as tomatoes, cucumbers and peppers; And economic crops such as tea and cotton.

Application recommendation

8-8-8 Balanced type: It is most suitable for use as base fertilizer. It should be applied during land preparation before sowing or transplanting to provide a balanced nutritional foundation for the entire growth period of crops.

13-6-6 high-nitrogen type: It is highly suitable for use as top dressing. For instance, it can be applied by opening furrows or holes during the early growth stage of crops (seedling stage, tillering stage, and new shoot emergence stage) to rapidly promote the growth of vegetative bodies.

Application amount: It should be determined specifically based on soil fertility, target yield and crop type. Generally, it can be appropriately increased compared with the recommended amount of pure chemical fertilizers.