The knowledge about the dynamics of nutrients from the application of organic waste is needed, especially in order to recycle, since the quantity of these materials has increased rapidly over time. Thus, this study aimed to assess the nutritional status and yield of guava, depending on application of by-product from the guava processing industry. The experimental was a randomized block design with five treatments and four replications, the doses of by-product were equal zero, 9, 18, 27 and 36 t ha-1 (dry weight of the material). There were five applications of waste in 2006, 2007, 2008, 2009 and 2010. It was evaluated the nutritional status of guava (macronutrients and micronutrients), as well as fruit production for six consecutive years. The application of by-product in guavas processing industry promoted changes in the nutritional status and fruit production. Doses of by-product increased foliar content of N, Mg and Mn. Fruit yield increased linearly as a function of residue doses. The effects of the by-product were observed primarily in the soil, then in the leaf contents and finally in the production of fruits along the seasons.
Psidium guajava; Residue; Nutritional diagnosis
