The application of animal husbandry slurry and manure substances to farmland is in line with the current trend of the perpetual agricultural cycle. In addition to reducing the environmental impact of surrounding river pollution and reducing the application of chemical fertilizers, it can also improve soil texture, increase the soil organic matter content of agricultural land, and promote the growth of roots of crops. During the implementation period, five kinds of crop cultivation processes were applied to the slurry and manure treatment. The results showed that the performance of different crops during the growing period was not consistent, and the results were not worse than the conventional farming method. Before and after the application of slurry and manure in agricultural land, the monitoring concentrations of soil organic matter, total Kjeldahl, total phosphorus, zinc and copper in the experimental group and the control group were similar. The concentration of Zn (between 75~100 mg/kg and 79~147 mg/kg) and Cu (between 13~24 mg/kg and 15~25 mg/kg) in agricultural land and greenhouse farmland are lower than the value of the regulatory standards for food crops in the soil pollution control standards announced by EPA. Comparing the records of the application of slurry and manure and the conventional farming method in the whole crop control. It was found that the root development of edamame, okra and leek was obviously stronger than that of the conventional farming method. The application of slurry and manure residue in the field allows the crop to grow in areas where the organic matter content is higher than that of the conventional farming method, resulting in a more vigorous root development. The accumulation of crops and minerals in the irrigation and slurry is similar to that of the conventional farming method. Planting crops does not cause the variation of the mineral elements in the crops due to the application of the biogas slurry, which in turn affects the growth of the crops. At the same time, according to the field test, soil, crop, slurry and manure related results inspection and analysis data, complete the preparation of the target crop of biogas slurry and biogas residue irrigation manual.

Piggery Waste, Digestate, Fertilizer