Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorREICHERT, J. M.pt_BR
dc.contributor.authorRODRIGUES, M. F.pt_BR
dc.contributor.authorBERVALD, C. M. P.pt_BR
dc.contributor.authorBRUNETTO, G.pt_BR
dc.contributor.authorKATO, O. R.pt_BR
dc.contributor.authorSCHUMACHER, M. V.pt_BR
dc.contributor.otherJosé Miguel Reichert, UFSM; Miriam Fernanda Rodrigues, UFSM; Clóvis Moisés Priebe Bervald, GSI BRAZIL; Gustavo Brunetto, UFSM; OSVALDO RYOHEI KATO, CPATU; Mauro Valdir Schumacher, UFSM.pt_BR
dc.descriptionNo-tillage planting in mechanically-chopped secondary-forest seeks to replace slash-and-burning agriculture. We evaluated the effect of horizontal (HC) and vertical (VC) chopping-and-mulching mechanisms on vegetation fragmentation and decomposition rate and nutrient release from chopped residue, and on cassava production in eastern Amazon. Chopped-and-mulched residue was classified into four residue-size (Fs1 = 1?7, Fs2 = 7?25, Fs3 = 25?35, and Fs4 = >35 mm) and six residue-type (with husk/bark ? WB, partially chopped ? PC, compact ? C, partially shredded into fibers ? PS, completely shredded into fibers ? CS, and formless residue ? F) classes. In litter-bags, residual dry matter (DM) was determined at five different days after chopping-and-mulching and residue distribution on soil surface (DAD), whereas release of N, P, K, Ca, and Mg was evaluated at four days. Residues-size and -type classes showed similar decomposition behavior, with a reduction of approximately 60% of initial DM at 90 DAD. Nevertheless, reduction in DM was slow, where 52 days are necessary for half of labile residue to be decomposed, with part of labile and recalcitrant residue remaining on soil surface. DM and nutrients in residue reduced over time. DM was 25% for residues-size classes for HC, 20% for VC, and 26% for residue-type classes, on average, at 300 DAD. Nutrients remaining in residues at 300 DAD were 26% and 27% of N, 26% and 22% of P, 29% and 22% of K, 16% and 15% of Ca, and 17% and 23% of Mg, respectively for HC and VC. Release of nutrients was, generally, greater for smaller residue-size classes, similar between chopping-and-mulching mechanisms, and did not affect cassava yield.pt_BR
dc.publisherAgriculture, Ecosystems and Environment, v. 204, p. 8-16, June 2015.pt_BR
dc.relation.ispartofEmbrapa Amazônia Oriental - Artigo em periódico indexado (ALICE)pt_BR
dc.subjectCorte mecanizadopt_BR
dc.subjectPropriedade química.pt_BR
dc.titleFragmentation, fiber separation, decomposition, and nutrient release of secondary-forest biomass, mechanically chopped-and-mulched, and cassava production in the Amazon.pt_BR
dc.typeArtigo em periódico indexado (ALICE)pt_BR
Appears in Collections:Artigo em periódico indexado (CPATU)

Files in This Item:
File Description SizeFormat 
1s2.0S0167880915000523main.pdf1,75 MBAdobe PDFThumbnail

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace