Cow Manure to be Organic Fertilizer
The excretion of cattle varies depending on the breed, age, weight and feeding and management conditions of the cattle. According to the survey, the annual excretion of cattle is 8703 kg, which is 3.8 times of the excretion of each pig. The total amount of cattle manure and urine resources in the country can reach 107.324 million tons, accounting for 34.10% of the total amount of manure and urine resources, second only to pig manure and urine resources. According to the estimation of the nutrient content of cattle manure, the excrement of 1 year per cow can provide 38.0 kg of nitrogen, 5.3 kg of phosphorus and 47.6 kg of potassium. The nitrogen, phosphorus and potassium provided by the national cattle waste resources are 4.701 million respectively. t, 629,000 tons, 5.855 million tons, a total of 11.185 million tons, equivalent to 33.71% of the total amount of inorganic nutrients put into the farmland nationwide, while also providing 99.687 million tons of crude organic matter; copper, zinc, iron, manganese, boron, molybdenum 656,000 tons; calcium, magnesium, sulfur, silicon and other nutrients of 25.45 million tons.
The composition of cow dung is similar to that of pig manure, mainly cellulose, hemicellulose, protein and its decomposition products and various inorganic salts. The cow is a ruminant. The feed is chewed repeatedly. The faeces are fine, and the drinking water is high. The water content in the manure is high, the air is not easy to circulate, the organic matter in the manure is difficult to decompose, and the rot is slow, which is a cold organic fertilizer. Unfertilized cow manure has low fertilizer efficiency and can be fertilized and fermented to improve fertilizer efficiency. The application of cow manure allows the soil to be loose and easy to cultivate, and the improved clay has a good effect. According to the national organic fertilizer quality grading standards, cow dung is of three grades with medium nutrient content.
The total nitrogen content of fresh cow manure is 0.38%, total phosphorus 0.10%, total potassium 0.23%, moisture content 75.0%, crude organic matter 14.9%, coarse ash powder 7.1%, C/N23.2, pH 7.9-8.0; The average content of trace elements: copper 5.7mg/kg, zinc 22.6mg/kg, iron 943mg/kg, manganese 139mg/kg, boron 3.2mg/kg, molybdenum 0.30mg/kg; calcium, magnesium, chlorine, sodium, sulfur, The average silicon content was 0.43%, 0.11%, 0.07%, 0.04%, 0.07%, and 3.7%, respectively.
Cattle excretion is slow, generally suitable as base fertilizer, which has certain yield-increasing effects on various crops, and composts cow dung. It is better to be mixed with hot organic fertilizer. It can be applied to over-sand and over-soiled soil to achieve good results in soil fertility and improve soil enzyme activity.