On July 20, 2020, the country issued a letter soliciting opinions on the revision of the agricultural industry standard "Commercial Organic Fertilizer"

The general content is as follows:

1. The standard name has been modified

2. The scope of application of the standard has been modified

3. The maturity seed germination index has been added to the terminology.

4. The classification management and evaluation of production materials have been added.

6. 7. Added technical indicators for seed germination and weed seed activity

7. Added limit indicators for heavy metal copper and modified limit indicators for heavy metal element lead

8. Modified technical indicators for water content

9. Modified calculation method for organic matter

10. Modified determination method for total nitrogen, phosphorus, and potassium content

11. Added seed germination index and mechanical impurity content. Detection method for weed seed activity

I have analyzed and explained the above 11 points. I have modified the name of one standard, It is said that commercial organic fertilizers are made from organic waste generated during the breeding and processing processes, such as animal manure and straw, and are fermented and matured. At the same time, it also stipulates the scope of inapplicability, which is not applicable to green manure, farmyard manure, manure produced by farmers themselves, and organic waste harmless treatment fertilizers mainly aimed at nearby application The second and third clauses have modified the scope of application of the standard, as well as the interpretation and definition of terms. Overall, this can be analyzed in the following way: what can be called organic fertilizer (which I will analyze in detail later in the article), as well as the definition of some terms in organic fertilizer. Among the three, there is a seed germination index, which refers to the ratio of the average root length of cucumber or radish seeds germinated in organic fertilizer extract to the average root length of seeds germinated in deionized water, used to evaluate the degree of maturity of organic fertilizer

Four new requirements have been added for the classification management and evaluation of production raw materials, usually for the production raw materials and technical indicators of organic fertilizers. Firstly, what are the standards for organic fertilizer raw materials?

(unit: milligrams per kilogram)

It is also required that the appearance color of organic fertilizers should be brown or grayish brown, granular or powdery, uniform and free of odor, and the content of mechanical impurities such as stones, glass, and plastics should be ≤ 1.0%.