Manufacture of nitrogenous fertilizers

Nitrogen fertilizer is an indispensable nutrient for crops and is closely related to the growth of crops. Nitrogen is an important part of plant chlorophyll, and it is also the key to the proliferation of crop cells. If a growing crop lacks nitrogen, the plant will appear short and weak; The leaves gradually dry and wither; the root system has few branches; it is significantly premature and mature, and the yield is reduced. Therefore, nitrogen fertilizer is extremely important for the growth and development of crops.

Manufacture of nitrogenous fertilizers:

1. First, prepare the raw materials for making nitrogen fertilizers. Many household wastes in daily life can be used as raw materials for homemade nitrogen fertilizers, such as waste vegetable leaves, melon and fruit peels, chicken fish, fish scales, bones, eggshells, and some moldy foods. Can. Then there are two methods, namely:

(1) Soaking liquid fertilizer

Put the prepared raw materials into a small vat (or a small altar), add an appropriate amount of water to the container, sprinkle a little trichlorfon, and cover the container tightly, and it can be used after high-temperature fermentation. It is very simple to use, just take the upper clear liquid from the container and dilute it with water. The last waste can also be used. Mix the waste with some old culture soil, put it in a large plastic bag, and place it tightly for a period of time before it can be used again.

(2) Waste composting

Choose a suitable place to dig a soil pit (6dm-8dm deep), put 10 cm of furnace ash at the bottom, bury the prepared raw materials in the pit, sprinkle some pesticides, and cover it with 10 cm thick Soil, in order to better ferment, we must pay attention to maintaining the humidity in the pit. It is best to choose to compost in autumn and winter. After it has been decomposed in spring and there is no odorous gas, it will be added to the culture soil as base fertilizer; you can also use a sieve to filter out the fine homemade fertilizer as a base fertilizer. Topdressing use.

Manufacture of nitrogenous fertilizersMaterials:

Nitrogen fertilizer materials that can be used are urea [CO(NH2)2], ammonia water (NH3.H2O), ammonium salts such as ammonium bicarbonate (NH4HCO3), ammonium chloride (NH4Cl), ammonium nitrate (NH4NO3). Some compound fertilizers such as ammonium phosphate [a mixture of ammonium dihydrogen phosphate NH4H2PO4 and diammonium hydrogen phosphate (NH4) 2HPO4], potassium nitrate (KNO3) can also be used as nitrogen fertilizers.

Fertilizer industry:

The chemical fertilizer industry mainly includes four sub-industries: nitrogen fertilizer manufacturing, phosphate fertilizer manufacturing, potash fertilizer manufacturing, and compound fertilizer manufacturing. From the global average level, nitrogen fertilizer accounts for 60% of the total chemical fertilizer, phosphate fertilizer accounts for 23%, and potash fertilizer accounts for 17%. China’s fertilizer production status is that the proportion of nitrogen fertilizers is much higher than the international average. Nitrogen fertilizers account for about 73% of the total fertilizer production, phosphate fertilizers account for about 22%, and potash fertilizers account for about 5%. Nitrogen fertilizer is the most consumed chemical fertilizer in China. The types of nitrogen fertilizers in China mainly include urea, ammonium nitrate, ammonium bicarbonate, ammonium sulfate, and other varieties. Urea is the main variety, accounting for more than 60% of China’s total nitrogen fertilizer consumption. The consumption of nitrogen fertilizer in most developed countries is basically all urea.

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