02177naa a2200253 a 450000100080000000500110000800800410001902400620006010000220012224501160014426000090026052013860026965000150165565000200167065000160169065300140170665300240172065300180174470000190176270000200178170000240180170000200182577300780184521226072020-05-27       2020    bl uuuu     u00u1 u    #d7 ahttp://dx.doi.org/10.1590/1983-21252020v33n204rc 3102DOI1 aARAÚJO, M. D. M.  aMineralization of nitrogen and carbon from organic compost from animal production waste.h[electronic resource]  c2020  aElucidating the mineralization of organic composts makes it possible to understand the release of nutrients to plants. The objective of this study was to evaluate the mineralization of nitrogen (N) and carbon (C) from organic compost from residues of the production and slaughter of small ruminants, applied on a Neossolo Flúvico (Fluvents). The compost consists of remains of grass (forage), manure and slaughter residues such as blood, viscera and the carcass of goats and sheep. Under laboratory conditions, two experiments were conducted in a completely randomized design, considering the doses of organic compost at the following levels: zero; 3.75, 7.5, 15 and 30 Mg ha-1. For the N and C mineralization tests, 11 and 32 collection times (sampling periods) were evaluated, respectively. Inorganic N content (ammonium and nitrate) was measured in the N mineralization test, and CO2-C concentration was quantified in the C mineralization test. The largest increments between the applied doses of organic compost from residues of the production and slaughter of small ruminants were 70% and 69% for potentially mineralizable N and C, with amounts of 7.5 and 30 Mg ha-1 at doses of 3.75 and 7.5 Mg ha-1, respectively. Organic C and N from residues of the production and slaughter of small ruminants are rapidly mineralized in the soil (up to 45 days) due to their low C/N ratio.  aComposting  aSmall ruminants  aCompostagem  aC/N ratio  aPequenos ruminantes  aRelação C/N1 aFEITOSA, M. M.1 aPRIMO, A. C. A.1 aTANIGUCHI, C. A. K.1 aSOUZA, H. A. de  tRevista Caatinga, Mossorógv. 33, n. 2, p. 310 ? 320, abr. / jun., 2020.