000			02124nab a2200301 i 4500
003			BR-BrBNA
005			20260330101903.0
008			260330b2019 bl.qr|pooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aP34 _b3240
072			_aP33
100			_aSoares, Emanuelle Merces Barros
100			_aTeixeira, Rafael da Silva
100			_aSousa, Rodrigo Nogueira de
100			_aVasconcelos, Aline de Almeida
100			_aSilva, Ivo Ribeiro da
245			_aSoil Organic Matter Fractions Under Eucalypt Plantation in Reform Management
500			_aPublicação on-line; 34 ref.; 2 tables; 5 illus.; Summary (En)
520			_a ABSTRACT Harvesting and reform in eucalyptus can lead to changes in soil organic matter (SOM). The objective of this work was to evaluate the changes in total organic C (TOC) and N (NT), C and N in humic acid (HA), fulvic acid (FH), light organic matter (LOM) and microbial biomass (MB), in Ultisol of eucalypt stands over one, two and four years of renovated areas in Rio Grande do Sul state. After the first year of eucalyptus reform, there were 78% of increases in TOC (0.0-1.0-m soil layer). After two years, there was an increase in TN and an average reduction of 52% in LOM-C (0.0-0.1-m soil layer). FA-C, HA-C, and HU-C presented mean reductions of 43 Mg ha–1 (0.0‑1.0-m soil layer) after four years of reform. The litter contribution of previous crop and the crop residues from the harvest resulted in increments of the SOM fractions. However, there is a negative effect in later years. Keywords: forest soils, reform, humic substances, microbial biomass, light organic matter.
650			_aSOLO FLORESTAL
650			_aHÚMUS
650			_aBIOMASSA
650			_aMICROBIOLOGIA DO SOLO
773	0		_02929 _9347951 _dRio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994 _o2025-0450 _tFloresta e Ambiente (Brazil) _x1415-0980 / ISSN 2179-8087 0nline _gv. 26(2) p. 1-10; (2019) _wBR2026000214
856			_uhttps://www.scielo.br/j/floram/a/7FL8mdqhGWVXMfWcTCp3Njb/?format=pdf&lang=en
942			_cANA
999			_c341135 _d341135