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Organic Fertilizer Resources in China
- Oct 10, 2017 -

China is a vast region with a large population and rich organic fertilizer resources. Many kinds and large quantity are the important fertilizer of Chinese agricultural production, but it is also the byproduct of agriculture and animal husbandry production. It can be said that where there is agriculture, livestock, where there are organic fertilizer. The city can be used in organic domestic waste, mainly from agricultural products and livestock products. Therefore, the more the development of agriculture and animal husbandry, the richer the organic fertilizer resources. According to the national survey, the current use of organic fertilizer has 14 categories more than 100 kinds. Human fecal urine is an important organic fertilizer. The average annual fecal excretion per adult is about 790 kg, the amount of nitrogen (N) is 4.4 kg, the phosphorus ($literal) 1.36 kg, and the potassium (K2O) 1.67 kg. such as the use of human feces collected by 60%, 30% of people's urine, China's rural population has 900 million, the equivalent of adults, each year can accumulate human fecal urine more than 160 billion kilograms, can provide agricultural production of 900,000 tons of nitrogen, phosphorus 280,000 tons, potassium 340,000 tons.

According to the Chinese Agricultural Yearbook 1990 data, the Chinese pig population is about 340 million, the cattle nearly 100 million head, mule Donkey 27 million, these livestock excrement quantity is big, the nutrient is rich, is China countryside biggest organic fertilizer resources. The pig can provide more than 1.3 million tons of nitrogen per year for agricultural production, 850,000 tons of phosphorus, 1.8 million tons of potassium, and large livestock can provide nitrogen more than 1.6 million tons, phosphorus 830,000 tons, potassium more than 1.1 million tons. Combined with 30多亿只 poultry and 10多亿只 rabbits each year, the amount of nutrients provided is the 63%~72% of the total amount of organic fertilizer in rural areas.

Crop stalks are also important organic fertilizer. Its nutrient is rich, the source is broad, the quantity is many, may directly return the field. is also a heap, composting and livestock zhi-important raw materials. The average annual yield of China's main crop stalks is more than 400 million tons, according to the rate of 30%, wheat straw return to field rate of 45%, corn straw return to field rate of 20% calculation, each year can be used as organic fertilizer straw is more than 130 million tons, can provide nitrogen 660,000 tons, phosphorus 400,000 tons, potassium 106,000 tons.