Abstract:

With the rapid development of aquaculture industry and processing industry in China, the environmental pollution caused by the random disposal of aquatic product wastes such as fish and shrimp scraps is not uncommon, and it also causes a lot of waste of resources. In this experiment, Jia 67 rice was planted with 5 different fertilization treatments for a period of 1 year, and it was found that in the local environment of Zhoushan, nitrogen substitution treatment such as 25% organic fertilizer for fish and shrimp scraps could increase the content of three major elements of soil nitrogen, phosphorus and potassium to a certain extent, and could improve the nutrient utilization efficiency of rice, promote the dry matter accumulation of rice grain, and improve the yield components, so as to maintain stable and high yield of rice. If the organic fertilizer can be put into market application, it can play a role in the resource utilization of aquatic product wastes such as fish and shrimp scraps, and reduce the pollution caused by waste flow into the environment. At the same time, it can broaden the access to organic fertilizer, improve the soil environment, increase farmers' choice of organic fertilizer, and reduce fertilizer input, which is of certain significance for promoting the development of agricultural economy and industry.

Key words: fish and shrimp scraps, organic fertilizer, rice, soil, nitrogen, phosphorus, potassium