Pesquisa Agropecuária Tropical (Jan 2009)
EFFECT OF WATER STRESS IN THE ROOT LENGTH DENSITY IN BEAN GROWTH STAGES EFEITO DO ESTRESSE HÍDRICO NA DENSIDADE DO COMPRIMENTO RADICULAR EM ESTÁDIOS DE DESENVOLVIMENTO DO FEIJOEIRO
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:595.3pt 841.9pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:35.4pt; mso-footer-margin:35.4pt; 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 style="color: black;">A field experiment was conducted in Rio Verde, State of Goiás, Brazil, with bean (<em>Phaseolus vulgaris</em> L.), Carioca Comum, Rudá, and Pérola cultivars, to evaluate the development of bean cultivars by the establishment of irrigation suppression periods in different growing stages (vegetative, first flowering, full flowering, pod filling, and full maturity), under two depths of fertilizer incorporation (5 cm and 15 cm). The treatments were applied as randomized blocks, with thirty treatments and four repetitions. The root length density was evaluated at 0-10 cm and 10-20 cm. The Carioca Comum cultivar presented higher root length density at 0-10 cm, when fertilizer was incorporated at 15 cm, in all the irrigation suppression periods, except for the pod filling period. The Pérola cultivar presented higher root length density, when fertilizer was incorporated at 15 cm, in all irrigation suppression periods, except for full maturity. The cultivars showed higher root length density in the 0-10 cm sampling layer.</span></p> <p class="MsoNormal" style="text-align: justify;"><span style="color: black;"><br /> KEY-WORDS: Roots; water deficit; irrigation suppression; <em>Phaseolus vulgaris</em> L.</span></p> <span style="font-size: small;"><span style="font-family: Times New Roman;"><span style="color: black;"></span></span></span><!--[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:595.3pt 841.9pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:35.4pt; mso-footer-margin:35.4pt; 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;">Realizou-se, no Campus da Universidade de Rio Verde, GO, experimento com a cultura de feijão (<em>Phaseolus vulgaris</em> L.), utilizando-se as cultivares Carioca Comum, Rudá e Pérola, com o objetivo de avaliar a densidade de comprimento radicular, estabelecendo-se períodos de supressão da irrigação, em diferentes estádios (vegetativo, pré-floração, plena floração, enchimento de vagens e final, ou maturação), sob duas profundidades de incorporação do adubo (5 cm e 15 cm). Os tratamentos foram dispostos em delineamento experimental de blocos ao acaso, com trinta tratamentos, em quatro repetições. A densidade de comprimento radicular das cultivares foi avaliada em duas profundidades de coleta: 0-10 cm e 10-20 cm. A cultivar carioca apresentou maior densidade de comprimento radicular (0-10 cm), quando o adubo foi incorporado à profundidade de 15 cm, em todas as fases, exceto quando a supressão da irrigação ocorreu na fase de enchimento de grãos. A cultivar Pérola apresentou densidade de comprimento radicular superior, sob profundidade de incorporação do adubo a 15 cm, em todas as épocas de supressão de irrigação, com exceção da maturação. As cultivares apresentaram maior densidade de comprimento radicular para a camada mais superficial de coleta (0-10 cm).</p> <p class="MsoNormal" style="text-align: justify;"><br /> PALAVRAS-CHAVE: Raízes; déficit hídrico; supressão da irrigação; <em>Phaseolus vulgaris</em> L.</p> <span style="font-size: small;"></span>
Keywords
