Pesquisa Agropecuária Tropical (Nov 2008)
BIOCHEMICAL ATTRIBUTES OF TWO SAVANNAH SOILS UNDER DIFFERENT MANAGEMENT SYSTEMS AND USE ATRIBUTOS BIOQUÍMICOS EM DOIS SOLOS DE CERRADO SOB DIFERENTES SISTEMAS DE MANEJO E USO
Abstract
<!-- @page { margin: 2cm } P { margin-bottom: 0.21cm } --> <p class="western" align="JUSTIFY"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">Soil biochemical attributes can be used as sensitive indicators of alterations promoted by the agricultural use, being a tool to guide tillage practices planning and evaluation to maintain soil sustainability. The objective of this study was to evaluate alterations in the soil organic carbon, biomass and microbial activity, urease and acid phosphatase activity, in two savannah soils, as affected by soil management systems. The study consisted of five soil management systems in a Typic Quartzipsamment, four in an Oxisol, and reference areas without alterations in the two soil types. The management systems changed the biochemical attributes of both soils. The Typic Quartzipsamment area under the soybean/<em>Brachiaria decumbens</em> sequence decreased the soil organic carbon and the microbial biomass carbon, and increased the respiration and <em>q</em>CO<sub>2</sub>, while the Oxisol, in all the areas, except for pasture, promoted reductions in the biochemical attributes. Among the management systems studied, the pasture provided improvements in the evaluated attributes, in both soils.</span></span></p> <p class="western" style="margin-bottom: 0cm;" align="JUSTIFY"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">KEY-WORDS: Soil quality; microbial biomass; soil enzymatic activity.</span></span></p> <!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:HyphenationZone>21</w:HyphenationZone> <w:DoNotOptimizeForBrowser /> </w:WordDocument> </xml><![endif]--> <!-- /* Font Definitions */ @font-face {font-family:Wingdings; panose-1:5 0 0 0 0 0 0 0 0 0; mso-font-charset:2; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:0 268435456 0 0 -2147483648 0;} @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:1627421319 -2147483648 8 0 66047 0;} @font-face {font-family:"Lucida Sans Unicode"; panose-1:2 11 6 2 3 5 4 2 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-2147476737 14699 0 0 63 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} h3 {mso-style-next:Normal; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; page-break-after:avoid; mso-outline-level:3; mso-hyphenate:none; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:Tahoma; mso-fareast-language:AR-SA; font-weight:normal;} p.MsoFootnoteText, li.MsoFootnoteText, div.MsoFootnoteText {margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoHeader, li.MsoHeader, div.MsoHeader {margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; tab-stops:center 220.95pt right 441.9pt; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoFooter, li.MsoFooter, div.MsoFooter {margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; tab-stops:center 220.95pt right 441.9pt; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} span.MsoFootnoteReference {mso-style-parent:""; vertical-align:super;} span.MsoEndnoteReference {mso-style-parent:""; vertical-align:super;} p.MsoEndnoteText, li.MsoEndnoteText, div.MsoEndnoteText {margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoList, li.MsoList, div.MsoList {mso-style-parent:"Corpo de texto"; margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Tahoma; mso-fareast-language:AR-SA;} p.MsoBodyText, li.MsoBodyText, div.MsoBodyText {margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoBodyTextIndent, li.MsoBodyTextIndent, div.MsoBodyTextIndent {margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:14.15pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoBodyText3, li.MsoBodyText3, div.MsoBodyText3 {margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; font-size:8.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} a:link, span.MsoHyperlink {mso-style-parent:"Fonte parág. padrão1"; color:blue; text-decoration:underline; text-underline:single;} a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline; text-underline:single;} span.WW8Num1z0 {mso-style-name:WW8Num1z0; mso-style-parent:""; font-weight:normal;} span.WW8Num3z0 {mso-style-name:WW8Num3z0; mso-style-parent:""; mso-ascii-font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";} span.WW8Num3z1 {mso-style-name:WW8Num3z1; mso-style-parent:""; mso-ascii-font-family:"Courier New"; mso-hansi-font-family:"Courier New";} span.WW8Num3z2 {mso-style-name:WW8Num3z2; mso-style-parent:""; mso-ascii-font-family:Wingdings; mso-hansi-font-family:Wingdings;} span.WW8Num3z3 {mso-style-name:WW8Num3z3; mso-style-parent:""; mso-ascii-font-family:Symbol; mso-hansi-font-family:Symbol;} span.Fontepargpadro1 {mso-style-name:"Fonte parág. padrão1"; mso-style-parent:"";} span.CaracteresdeNotadeRodap {mso-style-name:"Caracteres de Nota de Rodapé"; mso-style-parent:"Fonte parág. padrão1"; vertical-align:super;} span.CaracteresdeNotadeFim {mso-style-name:"Caracteres de Nota de Fim"; mso-style-parent:"";} p.Captulo, li.Captulo, div.Captulo {mso-style-name:Capítulo; mso-style-next:"Corpo de texto"; margin-top:12.0pt; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; page-break-after:avoid; mso-hyphenate:none; font-size:14.0pt; font-family:Arial; mso-fareast-font-family:"Lucida Sans Unicode"; mso-bidi-font-family:Tahoma; mso-fareast-language:AR-SA;} p.Legenda1, li.Legenda1, div.Legenda1 {mso-style-name:Legenda1; mso-style-next:Normal; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA; font-weight:bold;} p.ndice, li.ndice, div.ndice {mso-style-name:Índice; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan no-line-numbers; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Tahoma; mso-fareast-language:AR-SA;} p.Corpodetexto31, li.Corpodetexto31, div.Corpodetexto31 {mso-style-name:"Corpo de texto 31"; margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:8.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.Contedodatabela, li.Contedodatabela, div.Contedodatabela {mso-style-name:"Conteúdo da tabela"; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan no-line-numbers; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.Ttulodatabela, li.Ttulodatabela, div.Ttulodatabela {mso-style-name:"Título da tabela"; mso-style-parent:"Conteúdo da tabela"; margin:0cm; margin-bottom:.0001pt; text-align:center; mso-pagination:widow-orphan no-line-numbers; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA; font-weight:bold;} p.Contedodoquadro, li.Contedodoquadro, div.Contedodoquadro {mso-style-name:"Conteúdo do quadro"; mso-style-parent:"Corpo de texto"; margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.Textodebalo, li.Textodebalo, div.Textodebalo {mso-style-name:"Texto de balão"; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:8.0pt; font-family:Tahoma; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} span.CharChar2 {mso-style-name:" Char Char2"; mso-ansi-font-size:8.0pt; mso-bidi-font-size:8.0pt; mso-ascii-font-family:Tahoma; mso-hansi-font-family:Tahoma; mso-bidi-font-family:Tahoma; mso-fareast-language:AR-SA;} span.CharChar3 {mso-style-name:" Char Char3"; mso-ansi-font-size:12.0pt; mso-bidi-font-size:12.0pt; mso-fareast-language:AR-SA;} span.CharChar1 {mso-style-name:" Char Char1"; mso-fareast-language:AR-SA;} span.CharChar {mso-style-name:" Char Char"; mso-ansi-font-size:8.0pt; mso-bidi-font-size:8.0pt;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} /* List Definitions */ @list l0 {mso-list-id:1; mso-list-type:simple; mso-list-template-ids:1; mso-list-name:WW8Num1;} @list l0:level1 {mso-level-text:"%1)"; mso-level-tab-stop:18.0pt; mso-level-number-position:left; margin-left:18.0pt; text-indent:-18.0pt; mso-ansi-font-weight:normal;} @list l1 {mso-list-id:2; mso-list-template-ids:2;} @list l1:level1 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level2 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level3 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level4 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level5 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level6 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level7 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level8 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level9 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l2 {mso-list-id:682636630; mso-list-type:hybrid; mso-list-template-ids:457469196 68550671 68550681 68550683 68550671 68550681 68550683 68550671 68550681 68550683;} @list l2:level1 {mso-level-tab-stop:none; mso-level-number-position:left; text-indent:-18.0pt;} ol {margin-bottom:0cm;} ul {margin-bottom:0cm;} --><p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:HyphenationZone>21</w:HyphenationZone> <w:DoNotOptimizeForBrowser /> </w:WordDocument> </xml><![endif]--> <!-- /* Font Definitions */ @font-face {font-family:Wingdings; panose-1:5 0 0 0 0 0 0 0 0 0; mso-font-charset:2; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:0 268435456 0 0 -2147483648 0;} @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:1627421319 -2147483648 8 0 66047 0;} @font-face {font-family:"Lucida Sans Unicode"; panose-1:2 11 6 2 3 5 4 2 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-2147476737 14699 0 0 63 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} h3 {mso-style-next:Normal; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; page-break-after:avoid; mso-outline-level:3; mso-hyphenate:none; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:Tahoma; mso-fareast-language:AR-SA; font-weight:normal;} p.MsoFootnoteText, li.MsoFootnoteText, div.MsoFootnoteText {margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoHeader, li.MsoHeader, div.MsoHeader {margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; tab-stops:center 220.95pt right 441.9pt; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoFooter, li.MsoFooter, div.MsoFooter {margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; tab-stops:center 220.95pt right 441.9pt; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} span.MsoFootnoteReference {mso-style-parent:""; vertical-align:super;} span.MsoEndnoteReference {mso-style-parent:""; vertical-align:super;} p.MsoEndnoteText, li.MsoEndnoteText, div.MsoEndnoteText {margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoList, li.MsoList, div.MsoList {mso-style-parent:"Corpo de texto"; margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Tahoma; mso-fareast-language:AR-SA;} p.MsoBodyText, li.MsoBodyText, div.MsoBodyText {margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoBodyTextIndent, li.MsoBodyTextIndent, div.MsoBodyTextIndent {margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:14.15pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.MsoBodyText3, li.MsoBodyText3, div.MsoBodyText3 {margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; font-size:8.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} a:link, span.MsoHyperlink {mso-style-parent:"Fonte parág. padrão1"; color:blue; text-decoration:underline; text-underline:single;} a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline; text-underline:single;} span.WW8Num1z0 {mso-style-name:WW8Num1z0; mso-style-parent:""; font-weight:normal;} span.WW8Num3z0 {mso-style-name:WW8Num3z0; mso-style-parent:""; mso-ascii-font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";} span.WW8Num3z1 {mso-style-name:WW8Num3z1; mso-style-parent:""; mso-ascii-font-family:"Courier New"; mso-hansi-font-family:"Courier New";} span.WW8Num3z2 {mso-style-name:WW8Num3z2; mso-style-parent:""; mso-ascii-font-family:Wingdings; mso-hansi-font-family:Wingdings;} span.WW8Num3z3 {mso-style-name:WW8Num3z3; mso-style-parent:""; mso-ascii-font-family:Symbol; mso-hansi-font-family:Symbol;} span.Fontepargpadro1 {mso-style-name:"Fonte parág. padrão1"; mso-style-parent:"";} span.CaracteresdeNotadeRodap {mso-style-name:"Caracteres de Nota de Rodapé"; mso-style-parent:"Fonte parág. padrão1"; vertical-align:super;} span.CaracteresdeNotadeFim {mso-style-name:"Caracteres de Nota de Fim"; mso-style-parent:"";} p.Captulo, li.Captulo, div.Captulo {mso-style-name:Capítulo; mso-style-next:"Corpo de texto"; margin-top:12.0pt; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; page-break-after:avoid; mso-hyphenate:none; font-size:14.0pt; font-family:Arial; mso-fareast-font-family:"Lucida Sans Unicode"; mso-bidi-font-family:Tahoma; mso-fareast-language:AR-SA;} p.Legenda1, li.Legenda1, div.Legenda1 {mso-style-name:Legenda1; mso-style-next:Normal; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA; font-weight:bold;} p.ndice, li.ndice, div.ndice {mso-style-name:Índice; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan no-line-numbers; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Tahoma; mso-fareast-language:AR-SA;} p.Corpodetexto31, li.Corpodetexto31, div.Corpodetexto31 {mso-style-name:"Corpo de texto 31"; margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:8.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.Contedodatabela, li.Contedodatabela, div.Contedodatabela {mso-style-name:"Conteúdo da tabela"; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan no-line-numbers; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.Ttulodatabela, li.Ttulodatabela, div.Ttulodatabela {mso-style-name:"Título da tabela"; mso-style-parent:"Conteúdo da tabela"; margin:0cm; margin-bottom:.0001pt; text-align:center; mso-pagination:widow-orphan no-line-numbers; mso-hyphenate:none; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA; font-weight:bold;} p.Contedodoquadro, li.Contedodoquadro, div.Contedodoquadro {mso-style-name:"Conteúdo do quadro"; mso-style-parent:"Corpo de texto"; margin-top:0cm; margin-right:0cm; margin-bottom:6.0pt; margin-left:0cm; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} p.Textodebalo, li.Textodebalo, div.Textodebalo {mso-style-name:"Texto de balão"; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; mso-hyphenate:none; font-size:8.0pt; font-family:Tahoma; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:AR-SA;} span.CharChar2 {mso-style-name:" Char Char2"; mso-ansi-font-size:8.0pt; mso-bidi-font-size:8.0pt; mso-ascii-font-family:Tahoma; mso-hansi-font-family:Tahoma; mso-bidi-font-family:Tahoma; mso-fareast-language:AR-SA;} span.CharChar3 {mso-style-name:" Char Char3"; mso-ansi-font-size:12.0pt; mso-bidi-font-size:12.0pt; mso-fareast-language:AR-SA;} span.CharChar1 {mso-style-name:" Char Char1"; mso-fareast-language:AR-SA;} span.CharChar {mso-style-name:" Char Char"; mso-ansi-font-size:8.0pt; mso-bidi-font-size:8.0pt;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} /* List Definitions */ @list l0 {mso-list-id:1; mso-list-type:simple; mso-list-template-ids:1; mso-list-name:WW8Num1;} @list l0:level1 {mso-level-text:"%1)"; mso-level-tab-stop:18.0pt; mso-level-number-position:left; margin-left:18.0pt; text-indent:-18.0pt; mso-ansi-font-weight:normal;} @list l1 {mso-list-id:2; mso-list-template-ids:2;} @list l1:level1 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level2 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level3 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level4 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level5 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level6 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level7 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level8 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l1:level9 {mso-level-number-format:none; mso-level-suffix:none; mso-level-text:""; mso-level-tab-stop:0cm; mso-level-number-position:left; margin-left:0cm; text-indent:0cm;} @list l2 {mso-list-id:682636630; mso-list-type:hybrid; mso-list-template-ids:457469196 68550671 68550681 68550683 68550671 68550681 68550683 68550671 68550681 68550683;} @list l2:level1 {mso-level-tab-stop:none; mso-level-number-position:left; text-indent:-18.0pt;} ol {margin-bottom:0cm;} ul {margin-bottom:0cm;} --></p> <!-- @page { margin: 2cm } P { margin-bottom: 0.21cm } --> <p class="western" align="JUSTIFY"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;"><span style="color: #000000;">Os atributos bioquímicos do solo podem ser utilizados como indicadores sensíveis de alterações promovidas pelo uso agrícola, sendo uma ferramenta para orientar o planejamento e a avaliação de práticas de manejo e uso, visando à sustentabilidade do solo. O objetivo deste estudo foi avaliar as alterações no carbono orgânico do solo, na biomassa e atividade microbiana do solo, bem como na atividade de urease e fosfatase ácida, em dois tipos de solo de Cerrado, sob diferentes sistemas de manejo e uso do solo. O estudo constou de cinco sistemas de manejo e uso do solo em Neossolo Quartzarênico e de quatro sistemas em Latossolo Vermelho, além de áreas de referência sem alterações antrópicas nos dois solos. Os sistemas de manejo do solo promoveram alterações nos atributos bioquímicos, nos dois solos estudados, sendo que, no Neossolo Quartzarênico, a área sob a seqüência soja/braquiária provocou redução no carbono orgânico e no carbono da biomassa microbiana e aumento na respiração micobiana e no </span><span style="color: #000000;"><em>q</em></span><span style="color: #000000;">CO</span><span style="color: #000000;"><sub>2</sub></span><span style="color: #000000;">, enquanto, no Latossolo Vermelho, todas as áreas, com exceção da pastagem, promoveram reduções nos atributos bioquímicos avaliados. Dentre os sistemas de manejo estudados, a pastagem proporcionou melhorias nos atributos avaliados nos dois solos.</span></span></span></p> <p class="western" style="margin-bottom: 0cm;" align="JUSTIFY"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">PALAVRAS-CHAVE: Qualidade de solo; biomassa microbiana; atividade enzimática do solo.</span></span></p>
Keywords