Pesquisa Agropecuária Tropical (Jan 2009)
EFFECTS OF THE INTRODUCTION OF DIRECT SEEDED MAIZE PRODUCTION UNDER SMALL SCALE FARMERS CONDITIONS IN UNAÍ, MG (BRAZILIAN CERRADO) EFEITOS DA INTRODUÇÃO DO SISTEMA DE PLANTIO DIRETO DE MILHO POR AGRICULTORES FAMILIARES DO MUNICÍPIO DE UNAÍ, MG (CERRADO BRASILEIRO)
Abstract
<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if !mso]><object classid="clsid:38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui></object> <style> st1:*{behavior:url(#ieooui) } </style> <![endif]--> <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} @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;} --> <!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> <p class="MsoNormal" style="text-align: justify;"><span lang="EN-US">This paper evaluates the effects of the introduction of no tillage systems (SPD) in rainfed maize grain production, by smallholders, under <em>Cerrado</em> conditions, in the region of Unaí, Minas Gerais State, Brazil. The main constraints faced by farmers to produce are related to soil fertility management, difficulties in assessing tractors for preparing their land, and high levels of weed infestation. SPD was tested jointly with farmers trying to decrease these problems impacts. It showed promising results to stabilize, technically and economically, maize production. SPD solved completely the tractors dependency and contributed to decrease labour requirements for weed control. The production levels attained led to a better valorisation of the most scarce production factors, such as family labour and land. It was also evidenced the need to conduct more studies on the use of cover crops in those production systems.</span></p> <p class="MsoNormal" style="text-align: justify;"><span lang="EN-US"> </span></p> <p class="MsoNormal" style="text-align: justify;"><span style="text-transform: uppercase;"><span style="text-transform: uppercase;" lang="EN-US">Key-words</span></span><span lang="EN-US">: Family farming; conservation agriculture; no-tillage.</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:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if !mso]><object classid="clsid:38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui></object> <style> st1:*{behavior:url(#ieooui) } </style> <![endif]--> <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; 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margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} @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;} --> <!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> <p class="MsoNormal" style="text-align: justify;">Este artigo analisa o efeito da introdução do uso do sistema plantio direto (SPD) no cultivo de milho grão sequeiro, em condições de Cerrado, por agricultores familiares de Unaí, MG. As principais limitações para a condução das lavouras desses agricultores relacionam-se ao manejo da fertilidade, precariedade de acesso à mecanização para preparo de solo e alta infestação de plantas daninhas. O SPD foi testado junto a esses agricultores, buscando-se limitar os efeitos desses problemas. Ele mostrou-se promissor para viabilizar, técnica e economicamente, a produção de milho dos assentados. O plantio direto eliminou a dependência de maquinário para preparo de solo e reduziu a carga de trabalho para controle de plantas daninhas. As produtividades alcançadas possibilitaram a valorização de fatores escassos, tais como a terra e, sobretudo, a mão-de-obra familiar. Evidenciou-se, também, a necessidade de se conduzir mais estudos sobre o uso de plantas de cobertura nesses sistemas de produção.</p> <p class="MsoNormal" style="text-align: justify;"> </p> <p class="MsoNormal" style="text-align: justify;"><span style="text-transform: uppercase;"><span style="text-transform: uppercase;">Palavras-chave</span></span>: Agricultura familiar; agricultura conservacionista; plantio direto.</p>
Keywords
