January 24, the State Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Management Committee full disclosure of 2017 No. 32 China National Standard Announcement. Which involves 12 amendments to the recommended fertilizer industry standards and two fertilizer-related agricultural machinery standards, since July 1, 2018 come into force.
The newly revised national standard of the fertilizer industry is “urea” (GB / T2440-2017 instead of GB / T2440-2001), “liquid anhydrous ammonia” (GB / T536-2017 instead of GB / T536-1988), “ammonium nitrate (GB / T2945-2017 instead of GB / T2945-1989), “Determination of available phosphorus in compound fertilizers” (GB / T8573-2017 instead of GB / T8573-2010), “Agricultural potassium sulfate” -2017 instead of GB / T20406-2006), “superphosphate” (GB / T20413-2017 instead of GB / T20413-2006).
The main change of the new standard “urea” is to adjust indicators such as total nitrogen and biuret. The total nitrogen content of agricultural urea (UF) was adjusted from not less than 46.4% to not less than 46% and water from not more than 0.4% to not more than 0.5%. The total nitrogen content Not less than 46.0% Adjust to not less than 45.0%. The total nitrogen content of industrial urea grade products shall be adjusted from not less than 46.5% to not less than 46.4%; the total nitrogen content of qualified products should be not less than 46.0% from not less than 46.3%. In addition, the grades were rezoned, the premium grades and qualifying grades were retained, the first grade was canceled, the total nitrogen was changed from dry basis to wet basis, and the agricultural (fertilizer) urea container was marked with shrinkage Urea warnings.
In response to the pollution of arable land, the State Council issued the “Soil Pollution Prevention and Control Action Plan”, which requires the revision of the standards for fertilizers, feedstuffs, toxic and harmful substances in irrigation water, and control of pollutants in agricultural sludge. The new “superphosphate” standard adds arsenic, cadmium, lead, chromium, mercury, volatile organic compounds, and chloral requirements and determination methods.
The new standard “Determination of available phosphorus in compound fertilizers” increased ultrasonic extraction of water-soluble phosphorus, citric acid extraction of available phosphorus, and determination of water-soluble phosphorus and available phosphorus by plasma emission spectrometry. The new standard for agricultural use of potassium sulfate combines the requirements for agricultural use of potassium sulfate in water and salt systems and the requirements for agricultural use of potassium sulfate in non-water salt systems to increase the sulfur content requirements and test methods.
The newly developed “Determination of content of phthalate plasticizers in fertilizers – Gas chromatography – mass spectrometry” (GB / T35104-2017) for compound fertilizers (compound fertilizers), organic fertilizers, slow release fertilizers and other nitrogen Determination of Phthalate Plasticizers in Phosphorus and Potassium Fertilizers.
The newly developed “Determination of free-humic acid content of mineral source” (GB / T35106-2017), “Determination of soluble humic acid content in mineral-derived humic acid fertilizer” (GB / T35107-2017), ” (GB / T35111-2017) and the promulgation of “Classification of raw materials for agricultural use of humic and fulvic acids” (GB / T 35112-2017) will promote the development of humic acid fertilizers.
Compared with the current standard “stable fertilizers” (HG / T4135-2010), the newly developed “stable fertilizers” (GB / T35113-2017) in the determination of urea residue rate and inhibition of nitrification and other indicators of the principle and test The method changes.
It is noteworthy that the “variable fertilization planter control system” (GB / T 35487-2017) and “free (less) tillage fertilizer seeder” (GB / T 20865-2017 instead of GB / T20865-2007 “no-tillage and sowing Machine “) the implementation of the release, to improve the level of mechanized fertilization of great significance.