Wu Xiao, director of the Rural Economics Department of the National Development and Reform Commission of China, pointed out that the total amount of livestock and poultry produced in China is nearly 4 billion tons per year, and the chemical oxygen demand of livestock and poultry farming has reached 12.68 million tons, accounting for agricultural sources. 96% of the total is an important cause of agricultural non-point source pollution. As the farming method shifts from family free-range to large-scale farming, the amount of farming is growing rapidly, and environmental problems such as agricultural non-point source pollution caused by livestock and poultry manure are becoming more and more prominent. Wu Xiao said, 'If it can be effectively disposed and used rationally, livestock and manure will become a valuable resource.'
Zhong Luzhen, director of the Farmland and Fertilizer Management Division of the Plantation Management Department of the Ministry of Agriculture of China, said that China's various organic fertilizer resources are converted into nutrients of more than 74 million tons, but the actual utilization rate is less than 40%, especially for large-scale farming. Livestock and poultry manure are not used effectively. Promoting the utilization of livestock and poultry manure resources will greatly promote the replacement of chemical fertilizers by organic fertilizers.
In response to the growing pollution of agricultural non-point source pollution, China has proposed to basically solve the problem of manure treatment and resource utilization in large-scale livestock and poultry farms during the 13th Five-Year Plan period (2016-2020).
From 2018 to 2020, the National Development and Reform Commission and the Ministry of Agriculture of the People's Republic of China will increase investment and support more than 200 livestock counties throughout the county to promote the utilization of livestock and poultry manure resources, in order to realize the recycling of livestock and poultry manure throughout China. Use, replace the chemical fertilizer with organic fertilizer, and manage the successful model of agricultural non-point source pollution, and accelerate the construction of a sustainable development model of planting and breeding, agriculture and animal husbandry cycle. According to the plan, by 2020, the comprehensive utilization rate of livestock and poultry manure in each county should reach more than 90%, and the matching rate of equipment for sewage treatment facilities of scale farms will reach 100%.
Zhang Synthesized, Director of the Development Planning Department of the Ministry of Agriculture of China, said that it is of great significance to effectively provide high-quality and safe agricultural products, especially green agricultural products, to effectively improve the urban and rural living environment by doing a good job in the utilization of livestock and poultry manure resources.
The solutions proposed for the difficult problem of livestock and poultry farming waste at the present stage include livestock and poultry manure solid-liquid separation system, livestock manure composting fermentation system and drying carbonization system, which completely solve the problem of antibiotics and heavy metals, and the obtained products. It can be used as fertilizer for high value-added agricultural products (fruit, tea, etc.), and can also be used for soil remediation. It realizes the resource utilization of livestock and poultry farming waste, and directly converts waste from environmental pollution into products with economic value. The cost center goes to the value center.
Take the sustainable road of wasteland resources as the center, implement the county promotion, and establish a “modern ecological agriculture cycle” county demonstration project of “environmental protection, soil improvement, green planting and branding”, with modern agriculture and leisure literature. The brigade and the rural community will build a system of benign interaction and circular development, realize beautiful villages, accelerate the construction of rural complexes, and vigorously implement the rural revitalization strategy.
Every city needs a solid waste resource center