On December 15, Chen Nanzhong, chief of the sales department of Yunnan Lufeng Qinfeng Phosphorous Chemicals Co., Ltd. called the reporter. Talking about this period of time, customers outside Yunnan Province reported to them that some phosphorus chemical companies in Sichuan and Yunnan Province will Fertilizer-grade calcium hydrogen phosphate (commonly known as white manure) is directly used as fertilizer, and it has been sold to a large number of northern markets such as Shandong and Henan, which not only affects the sales of regular calcium production companies, but also seriously damages the interests of local farmers. Yunnan Pufeng QinPan Chemical Co., Ltd.'s calcium production capacity is 400,000 tons/year, accounting for about 1/10 of Yunnan Pu'er's total production capacity. No matter whether it is production capacity, quality or brand, it ranks among the top in Yunnan Province. Chen Nanzhong told reporters that strictly speaking, white manure is a chemical waste and is a waste residue for the production of feed-grade calcium hydrogen phosphate. It can only be used as a fertilizer in acidic soils in the south. If it is used in saline-alkaline fields in the north, it is not only not effective. It will cause soil compaction. However, the farmers did not understand these common knowledge of fertilizers, because the white manure marked the content of available phosphorus (P2O5) in the appearance, and was even higher than the available phosphorus in the calcium sulphate. “At the beginning of this year, those manufacturers only added white manure to ordinary calcium for sale. Now that this situation has intensified, it has evolved to directly send white manure to Heze in Shandong, Shangqiu in Henan, Fucheng and Kaifeng for sales. This practice has not only adversely affected the soil in the north, but also impacted the products of regular manufacturers. The agricultural technology department also did not bear the responsibility of guiding farmers to use fertilizer.†Chen Nanzhong reluctantly told reporters. A person in charge of Huangmailing Phosphorus Chemical Industry Co., Ltd. in Hubei Province told reporters that they also found that some small businesses sold white fat at the junction of Anhui and Henan. The soil in these areas is somewhat alkaline. The sale of white fertilizer has some impact on the sales of their products. If farmers use white fertilizer, they will also have adverse effects on the local soil. It is understood that white fertilizer is not a fake fertilizer, it is a kind of fertilizer, but also has its own industry standards. The former State Bureau of Petroleum and Chemical Industry was issued on April 20, 1999 and April 1, 2000, the "China Chemical Industry Standard - Fertilizer Grade Dicalcium Phosphate" (HG/T 3275-1999). The standard specifies three quality indicators for white manure: free moisture content, available phosphorus content, and pH value. P2O5 content indicators are: 25% of excellent products, 20% of first-class products, 15% of qualified products; indicators of free water: superior products is less than or equal to 10%, 15% of first-class products, 20% of qualified products; pH are Greater than or equal to 3.0. “Since the national white fertilizer industry standard, white fertilizer is also allowed to apply. However, because the standard does not specify the scope of adaptation of this product (in the case of the southern acidic soil) and precautions (does not apply to saline and alkali), some companies The opportunity to take advantage of this, coupled with the fact that some small distributors have contributed to the incident, has resulted in damage to the interests of farmers and a lot of ordinary calcium manufacturers,†said Chen Nanzhong. The reporter learned that this product does not contain water-soluble phosphorus and only contains cadmium-soluble phosphorus. It can only be applied to acidic soils. If it is applied to alkaline soils, it will cause soil compaction, and farm output will be reduced because there is no fertilizer effect. At the beginning of this year, the sale of white manure to ordinary calcium was only found in Tongling, Anhui Province and Suizhou, Hubei Province. At present, the phenomenon of selling white manure directly to farmers has begun to appear in northern markets such as Shandong and Henan. Because most of the soil in the country is alkaline, if white fertilizer is sold at these places, it will have serious consequences. After investigation, the reporter found that the reason why white fertilizer can be sold in large quantities in the northern market, there are several reasons: First, its cost is lower than that of ordinary calcium, but the standard of available phosphorus is higher than that of ordinary calcium. Farmers only recognize the signs and it is unclear what the fertiliser's fertilizer efficiency and scope of application are. Second, even though some small distributors have common sense in this area, because the price for getting goods from the factory is low, their marked effective phosphorus content and sales price are all higher than that of ordinary calcium, and they can earn more profits from it. It also pushed the boat and closed it. Thirdly, in recent years, some phosphorus chemical companies in Sichuan and Yunnan have a higher capacity for the production of feed-grade calcium hydrogen phosphate and produce a large amount of fertilizer-grade dicalcium phosphate. In order to reduce costs, these enterprises must certainly use this kind of by-products. Pass on to go out. In addition, the inaction of the agricultural technology department is also an important reason for this phenomenon. Therefore, Chen Nanzhong called for white-fertilizer companies to label their products as fertilizers. They should also indicate where they can be used, where they can not be used, and where they cannot be sold in markets where they are clearly saline-alkali lands. The agricultural technology promotion department and the government supervision department should do their utmost to provide necessary tips and guidance to the farmers. If farmers are told clearly about the local soil quality and whether they can use the common knowledge of white fertilizer, do not let the farmers be deceived without their knowledge. 6Th Filter Pleating Machine,Filter Making Machine,Filter Pleated Machine,Filter Pleating Machine ChangZhou FENGJU Machinery Equipment CO., LTD , https://www.fengjumachinery.com