肥料的品种很多,农村普遍使用的是人粪肥、绿肥、厩肥和化学工业生产的氮肥等,对乌黑的煤炭也可制成肥料恐怕不是大家所熟悉的。实际上,我国化肥主要原料是煤炭,它是将煤炭气化制造半水煤气。从而生产合成氨,再进一步制成各种氮肥。泥煤、褐煤或风化煤直接施在农田里有一定的肥效。煤炭当作燃料燃烧后的煤灰、炉渣或烟道气中的飞灰也都能作肥料,可以把它们直接施于农田,或与其 There are many kinds of fertilizers. Manure, green manure, manure and nitrogenous fertilizer produced in the chemical industry are commonly used in rural areas. The black coal can also be made into fertilizer and probably not everyone is familiar with it. In fact, China’s main raw material for fertilizer is coal, which is the manufacture of semi-gas coal gasification. Thus producing synthetic ammonia, and then further made into various nitrogenous fertilizers. Peat, lignite or weathered coal directly in the farmland have a certain effect. Coal can also be used as fertilizer after it has been burnt as fuel, as fly ash from slag or flue gas, and can be applied directly to farmland or mixed with