Vermicompost and millicompost as a resource in sustainable agriculture in semiarid: decomposition, nutrient release, and microstructure under the action of nitrogen and organic-mineral fertilizers.

Autor: de Lavôr WKB; Center of Agrarian Sciences, Federal Rural University of the Semi-Arid, Mossoró, RN, 59625900, Brazil., da Silva EF; Center of Agrarian Sciences, Federal Rural University of the Semi-Arid, Mossoró, RN, 59625900, Brazil., de Almeida Ferreira E; Center of Bioscience, Federal Rural University of the Semi-Arid, Mossoró, RN, 59625900, Brazil., Gondim JEF; Center of Agrarian Sciences, Federal Rural University of the Semi-Arid, Mossoró, RN, 59625900, Brazil., Portela JC; Center of Agrarian Sciences, Federal Rural University of the Semi-Arid, Mossoró, RN, 59625900, Brazil., de Sousa Antunes LF; Federal Rural University of Rio de Janeiro, Seropédica, RJ, 23897000, Brazil. fernando.ufrrj.agro@gmail.com.; Federal Rural University of Rio de Janeiro, Rodovia BR 465, Km 07, Seropédica, Rio de Janeiro, Zip Code 23890-000, Brazil. fernando.ufrrj.agro@gmail.com., de Almeida Vasconcelos A; Center of Agrarian Sciences, Federal University of Sergipe, São Cristovão, SE, 49107230, Brazil., de Freitas DF; Center of Agrarian Sciences, Federal University of Ceará, Fortaleza, CE, 60020181, Brazil., Mendonça V; Center of Agrarian Sciences, Federal Rural University of the Semi-Arid, Mossoró, RN, 59625900, Brazil., Fernandes BCC; Center of Agrarian Sciences, Federal Rural University of the Semi-Arid, Mossoró, RN, 59625900, Brazil.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2024 May; Vol. 31 (23), pp. 33924-33941. Date of Electronic Publication: 2024 May 01.
DOI: 10.1007/s11356-024-33446-z
Abstrakt: With the expansion of organic agriculture, research is needed to indicate economically and ecologically viable fertilizer options, especially in semiarid regions, with low soil organic matter and nitrogen content. In the Brazilian semiarid region, vermicomposts are widely used by farmers and are scientifically investigated; however, there is no information for millicompost, a new type of organic compound that has shown very promising results in other regions. Thus, this study aimed to analyze the decomposition rate, nutrient release, and microstructure evaluation of vermicomposts from different sources and of millicompost produced from plant residues, with the application of mineral nitrogen-urea and organo-mineral fertilizer in the Brazilian semiarid region. The experimental design was a randomized block in a 4 × 3 factorial scheme, with four replicates; four organic composts (millicompost, commercial vermicompost, vermicompost from bovine manure, vermicompost from goat manure); and three types of fertilization (without fertilizer, with mineral-urea and organo-mineral fertilizer). The organic composts were decomposed using litterbags at the soil surface. The variable's decomposition rate and the nutrient release were evaluated at six-time intervals (0, 30, 60, 90, 120, and 150 days), and microstructure was evaluated at the beginning and the end of the experiment, with scanning electron microscopy (SEM). The highest decomposition was verified for commercial vermicompost rich in macro and micronutrients and with lower P contents. The lignin:N ratio and the initial P content were more important in the permanence of the organic compost in the field than the C:N ratio. Regardless of the organic composts, the use of urea as a mineral fertilizer stimulated decomposition more than the organo-mineral fertilizer. The initial composition of the nutrients was decisive in the dynamics of nutrient release, mass loss, and decomposition of C. There was no pattern in the release order of macronutrients. However, for the micronutrients, the release order was Cu > Fe > Mn, in all treatments. Microstructure analysis is a visual analysis where differences are detected through microphotographs and the biggest difference occurred with millicompost, which showed elongated fibers and fiber bundles, forming a relatively open structure characteristic of the presence of fulvic acid. However, the addition of organo-mineral fertilizer formed agglomerates in compacted micro-portions, helping the mineralization of C and N.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
Externí odkaz: