ISSN: 1659-2751

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Comparison of the Nutrient Content in Bokashis Produced from Agricultural Wastes Generated on Farms of the Humid Tropics of Costa Rica

Abstract

This study evaluated and compared the nutrient content in bokashis produced from agricultural wastes generated on farms of the humid tropics of Costa Rica. The experiment consisted of 10 treatments, traditional bokashi as a control and 9 combinations of 3 sources of N (bovine manure, swine manure, and araquis-poró) and 3 sources of easily degradable C (banana, cassava and yam). The N and C sources substituted the chicken manure and semolina, respectively, used in traditional bokashi. Banana raquis substituted the rice bran, also used in traditional bokashi. After 21 days of degradation, macro- and micronutrient contents and C:N and C:P ratios were determined. The N, C, P, K, Cu, Ca and Zn contents and the C:N and C:P ratios were positively influenced by the source of N, but not by the source of easily degradable C. Any of the combinations of N and C sources yielded a bokashi of similar or of better quality than the traditional bokashi. The bokashi produced with swine manure had the lowest C:N ratio and it was considered as having the best nutritional quality. In conclusion, bokashi of similar or of better quality than the traditional bokashi can be produced from agricultural wastes generated in the humid tropics.

Key words: Bokashi, cattle manure, compost, poultry manure, swine manure.

Artículo en español (pdf) (2368)