The country will implement a new standard for compound fertilizer

On June 2nd, 2009, in order to standardize the market order of compound fertilizers, promote the healthy development of the compound fertilizer industry and protect the interests of farmers, the State Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Administration Committee approved the publication of the GB15063-2009 “Compound” on November 30, 2009. The National Standard for Fertilizer (Composite Fertilizer), instead of GB 15063-2001 "Compound Fertilizer (Composite Fertilizer)" standard, the new standard was formally implemented on June 1, 2010.

The differences between the old and new standards are mainly reflected in the following five aspects:

First, further clarify the scope of application.

The new standard applies to compound fertilizers (including various special fertilizers and ternary or binary solid fertilizers based on nitrogen, phosphorus and potassium nutrients under various names); compound fertilizers that already have national or industry standards, such as Phosphate monoammonium phosphate, diammonium phosphate, phosphate fertilizer, potassium phosphate fertilizer, agricultural pesticide, potassium dihydrogen phosphate, calcium magnesium phosphate potassium fertilizer, organic-inorganic compound fertilizer, blend fertilizer, etc. This standard does not apply. Sustained release of compound fertilizers at the same time implement the corresponding standards. Make the scope of application of the standard more clear.

Second, adjust the index of available phosphorus in water-soluble phosphorus of high-concentration products.

The original standards for the percent of soluble phosphorus in the percentage of available phosphorus were: high concentration 70%, medium concentration 50%, low concentration 40%. The new standard was adjusted to: 60%, 50%, 40%, and high concentration decreased by 10%. On the whole, the new standard's requirement for water-soluble phosphorus has been reduced, which is more in line with the actual situation of the current compound fertilizer production, which is beneficial to the compound fertilizer enterprises to reduce production costs and the wider use of raw materials, and there is no big use of farmers. influences.

Third, the increase in chloride ion content indicators, this is the new standard compared with the old standard changes a place.

The new standard adds the indicator of chlorine ion content of chlorine-containing products, and specifies the requirements for low chlorine, medium chlorine, and high chlorine as follows: For products not containing “chlorine,” the mass fraction of chlorine ions shall be ≤ 3.0%; Chlorine (low chlorine) products, chloride ion mass fraction should be ≤ 15.0%; identification of chlorine (chlorine) products, chlorine ion mass fraction should be ≤ 30.0%; chloride ion mass fraction greater than 30.0% The product shall be marked with "chlorine (high chlorine)" on the packaging bag, and the chlorine ion mass fraction of the product with "chlorine (high chlorine)" may not be tested or determined. According to the new standard, products marked with “chlorine” should not have pictures of chlorine-tolerant crops on the packaging containers, nor should there be “** potassium (type)”, “*** (type)”, and “* basis”. Such as easily lead to the user mistakenly believe that the product does not contain chlorine logo.

Fourth, an increase of some product warnings.

The new standard adds warnings for products containing urea nitrogen and chlorine (high chlorine) products. Products containing urea nitrogen should be marked on the packaging container with the following warning: "With biuret, improper use may cause damage to the crop." Products with “Chlorine (High Chlorine)” mark should be marked on the packaging container with the applicable crop varieties and warning words “Improper use may cause damage to crops”. At the same time, all products marked with “chlorine”, packaging containers No pictures of bogey crops should appear on the plot.

Fifth, other differences.

The new standard will change the moisture content to the factory inspection data. In the past, moisture content was often an indicator that was easily controversial. Because in the process of storage and transportation, there may be phenomenon of excessive moisture content due to moisture or water infiltration, which leads to excessive moisture content in the middle-level quality inspection department and penalties, while the manufacturer It is easy to be controversial when you say that you are qualified at the factory and you add more water to the circulation. Now clearly stipulated that the moisture content is based on the factory inspection data, circulation does not need to be tested, this change is beneficial to the manufacturer.

In addition, the nitrogen, phosphorus, and potassium contents of the product determined by automatic analysis instruments have been added to the new standard, which is suitable for rapid testing of compound fertilizers. At the same time, the method for the determination of biuret content and the requirement for the content of biuret in the product quality certificate have also been added. Make the detection method and content more scientific and rigorous, more able to meet the actual needs of the work.