January 21 , the National Development and Reform Commission website published an article that the NDRC Trade Division found in some raw materials for fertilizer production may pollute the environment , fertilizer "package of oil is more difficult to degrade in the soil will cause soil and water contamination in the research potential "" oil accumulation and effects of fertilizer wrapped in the environment should not be underestimated . " the news caused strong concern in the industry in recent days, reporters on the issue in-depth interviews with industry experts and fertilizer companies , the oil industry generally believe that part of the package potential soil contamination risk worthy of attention , but halted oil must first overcome technical bottlenecks parcels .

Shanghai Chemical Industry Research Institute deputy chief engineer Chen Mingliang an interview with reporters , said parcel wrapped in oil outside the fertilizer granules , used in conjunction with anti-caking agents, coloring agents , the main role is to dissolve the anti-caking agents and extend its parcel area , enhanced anti-caking effect of fertilizer per tonne of fertilizer in an amount of 1% to 2%. He said that the current oil parcels within the fertilizer industry used mainly two kinds of vegetable and mineral oils , the former degradable in the soil , but because of the smell and easy to use fertilizer , use a smaller proportion ; contrast, the use of mineral oil larger proportion , but its main ingredient is a high molecular hydrocarbons in soil degradation is more difficult , there is a potential for soil contamination risk .

Industry experts said that the fertilizer package has two main oil effect : First, dissolve the dye auxiliary color, the second is to enhance the anti- caking effect. Chinese compound fertilizer Industry Association vice president Xiuxue Feng believes that color is mainly affected by the habits of farmers , fertilizer companies should voluntarily renounce the use of parcels of oil. For anti-caking problem, she suggested fertilizer companies take the initiative to develop and use more environmentally friendly anti-caking material. Diammonium industry is using the "package of oil " is mainly heavy oil, soil and crop growth unhelpful , there is a potential risk of contamination while increasing business costs .

Xiuxue Feng said that at the meeting held last year on behalf of the Association Council , the Association has released a self-discipline convention , advocating compound fertilizer enterprises is one of them do not add to the soil and crop useless substances , oil wrapped in fertilizer .

According to AP corporate sources, in order to prevent caking of fertilizers , 90% diammonium manufacturers are using parcel oil. Other than the fertilizer diammonium also using parcel oil , the amount can not be ignored . Official data show that: the national apparent consumption of diammonium at 10 million tons per year (in real terms ) is about to wrap oil per ton of fertilizer dosage of 1% to 2% of the total , diammonium only one species, the annual inflow of oil on farmland parcels 100,000 tons or so.

Chen Mingliang said that to prevent the environmental risks of oil brought parcels , companies can proceed in two ways : First, by using recycled vegetable oil to solve the scalability problem replacing fossil oil-soluble anti-caking agent , which makes fertilizer although there smell , but can be implemented in soil degradation , more environmentally friendly ; two is to develop a water-soluble anti-caking agent, the oil -soluble anti-caking agent is done without a solvent , thereby replacing oil inclusions . He also said that to solve the problem completely wrapped in oil -soluble anti-caking agents related to the development of certain technical bottlenecks.