In order to develop ecological agriculture and develop and produce pollution-free "green food", the fertilization technology in agricultural production must be reformed, that is, the rational application of chemical fertilizers, the sustainable development of organic-inorganic cooperative application, and the promotion and development of the application of biological fertilizers. With China's accession to the "World Trade Organization" and the "Tenth Five Year Plan" putting forward higher requirements on China's environmental and resource protection and people's living and health standards, an era of reducing the use of chemical fertilizers and pesticides and vigorously developing bio organic fertilizers has come.

The organic matrix and carrier in the production of bio organic fertilizer in the organic fertilizer production line can also be selected according to local conditions. In areas where the soil is hardened due to the long-term application of chemical fertilizer, peat soil (peat soil), pond mud, river mud, garbage sludge, poultry manure, shale, coal gangue, coal ash, agricultural and sideline products waste, etc. rich in organic matter can be selected as the matrix. After high-temperature sterilization, microbial agents, deodorants, promoters, stabilizers, synergists, etc. can be added. The formula is formulated according to scientific principles. After fermentation and multiplication, it can be dried to make powder or granular fertilizer. Microbial fertilizer strain agent is made of dry and high-temperature resistant spore producing fungi, which can be stored for a long time. In addition to organic matter and microorganisms, a small amount of quick acting fertilizer and trace elements can be added according to different soil fertility conditions. For example, a small amount of quick acting nitrogen fertilizer should be added in nitrogen deficient areas, and corresponding trace elements should be added in zinc and molybdenum deficient areas. A small amount of inorganic fertilizer added with biological fertilizer has formed organic and inorganic complex due to the fermentation with organic fertilizer source and microorganism, and will not cause fertilizer residue. This biological fertilizer is not only suitable for general farmland fertilization, but also suitable for "green food" production.

A complete set of large-scale livestock and poultry organic fertilizer production lines with an annual output of 100000-200000 tons include: forklift feeder, trough type stacker, vertical crusher, roller screening machine, dynamic batching machine, granulator, rounding machine, dryer, cooling machine, coating machine, automatic quantitative packaging scale.