COMPOSIÇÃO MINERAL DE GRÃOS DE TRIGO SUBMETIDOS A DOSES DE SULFATO DE AMÔNIO E TRINEXAPAC-ETIL MINERAL COMPOSITION OF WHEAT GRAINS SUBJECTED TO AMMONIUM SULFATE AND TRINEXAPAC-ETHYL RATES

• Main Authors: Pedro Henrique Monnerat, Valterley Soares Rocha, Marcela Campanharo, Marcelo Curitiba Espindula, Luiz Fernando Favarato
• Format: Article
• Language: English
• Published: Universidade Federal de Goiás 2010-10-01
• Series: Pesquisa Agropecuária Tropical
• Subjects: Triticum aestivum L.; nutrição; redutor de crescimento
• Online Access: http://www.revistas.ufg.br/index.php/pat/article/view/6928

&lt;!--[if gte mso 9]&gt;&lt;xml&gt; &lt;w:WordDocument&gt; &lt;w:View&gt;Normal&lt;/w:View&gt; &lt;w:Zoom&gt;0&lt;/w:Zoom&gt; &lt;w:HyphenationZone&gt;21&lt;/w:HyphenationZone&gt; &lt;w:PunctuationKerning /&gt; &lt;w:ValidateAgainstSchemas /&gt; &lt;w:SaveIfXMLInvalid&gt;false&lt;/w:SaveIfXMLInvalid&gt; &lt;w:IgnoreMixedContent&gt;false&lt;/w:IgnoreMixedContent&gt; &lt;w:AlwaysShowPlaceholderText&gt;false&lt;/w:AlwaysShowPlaceholderText&gt; &lt;w:Compatibility&gt; &lt;w:BreakWrappedTables /&gt; &lt;w:SnapToGridInCell /&gt; &lt;w:WrapTextWithPunct /&gt; &lt;w:UseAsianBreakRules /&gt; &lt;w:DontGrowAutofit /&gt; &lt;/w:Compatibility&gt; &lt;w:BrowserLevel&gt;MicrosoftInternetExplorer4&lt;/w:BrowserLevel&gt; &lt;/w:WordDocument&gt; &lt;/xml&gt;&lt;![endif]--&gt;&lt;!--[if gte mso 9]&gt;&lt;xml&gt; &lt;w:LatentStyles DefLockedState="false" LatentStyleCount="156"&gt; &lt;/w:LatentStyles&gt; &lt;/xml&gt;&lt;![endif]--&gt;&lt;!--[if !mso]&gt;&lt;object classid="clsid:38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui&gt;&lt;/object&gt; &lt;mce:style&gt;&lt;! st1:*{behavior:url(#ieooui) } --&gt; &lt;!--[endif]--&gt; &lt;!-- /* 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;} --&gt; &lt;!--[if gte mso 10]&gt; &lt;mce:style&gt;&lt;! /* 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;} --&gt; &lt;p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"&gt;&lt;span style="color: #000000;"&gt;&lt;span style="font-family: Times New Roman,serif;"&gt;&lt;span style="font-size: small;"&gt;A composi&amp;ccedil;&amp;atilde;o mineral de gr&amp;atilde;os &amp;eacute; importante para a defini&amp;ccedil;&amp;atilde;o da qualidade nutricional do alimento e qualidade fisiol&amp;oacute;gica das sementes, devendo ser considerada no estabelecimento dos n&amp;iacute;veis adequados de aduba&amp;ccedil;&amp;atilde;o. Neste contexto, objetivou-se, com este estudo, avaliar o efeito de doses de sulfato de am&amp;ocirc;nio (SA) e de trinexapac-etil, na composi&amp;ccedil;&amp;atilde;o mineral de gr&amp;atilde;os de trigo (&lt;em&gt;Triticum aestivum&lt;/em&gt; L.) cv. Pioneiro. O experimento foi desenvolvido em Vi&amp;ccedil;osa (MG), no per&amp;iacute;odo de junho a outubro de 2006. Os tratamentos foram cinco doses de SA (150 kg ha&lt;sup&gt;-1&lt;/sup&gt;, 300 kg ha&lt;sup&gt;-1&lt;/sup&gt;, 450 kg ha&lt;sup&gt;-1&lt;/sup&gt;, 600 kg ha&lt;sup&gt;-1&lt;/sup&gt; e 750 kg ha&lt;sup&gt;-1&lt;/sup&gt;), combinadas com quatro doses de trinexapac-etil (0 g ha&lt;sup&gt;-1&lt;/sup&gt;; 62,5 g ha&lt;sup&gt;-1&lt;/sup&gt;; 125 g ha&lt;sup&gt;-1&lt;/sup&gt;; e 187,5 g ha&lt;sup&gt;-1&lt;/sup&gt;). O experimento foi instalado em delineamento de blocos casualizados, com quatro repeti&amp;ccedil;&amp;otilde;es. As doses de SA aumentaram as concentra&amp;ccedil;&amp;otilde;es de N-total (prote&amp;iacute;na), Ca, S, Cu e Zn e diminu&amp;iacute;ram as concentra&amp;ccedil;&amp;otilde;es de P, K e Mn (acima de 457 kg ha&lt;sup&gt;-1&lt;/sup&gt;de SA). Os teores de Mg e Fe n&amp;atilde;o foram influenciados pelas doses de SA. O trinexapac-etil promoveu aumento de N-total, P e Mn e redu&amp;ccedil;&amp;atilde;o de Ca. Os teores de K, S, Cu, Zn, Mg e Fe n&amp;atilde;o foram influenciados pelo redutor. Concluiu-se que a aplica&amp;ccedil;&amp;atilde;o de SA melhora a qualidade nutricional de gr&amp;atilde;os, enquanto a utiliza&amp;ccedil;&amp;atilde;o do redutor de crescimento trinexapac-etil n&amp;atilde;o influencia na composi&amp;ccedil;&amp;atilde;o mineral dos mesmos.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt; &lt;p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"&gt;&lt;span style="color: #000000;"&gt;&lt;span style="font-family: Times New Roman,serif;"&gt;&lt;span style="font-size: small;"&gt;PALAVRAS-CHAVE:&lt;strong&gt; &lt;/strong&gt;&lt;em&gt;Triticum aestivum&lt;/em&gt; L.; nutri&amp;ccedil;&amp;atilde;o; redutor de crescimento.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;<br>&lt;p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"&gt;&lt;span style="color: #000000;"&gt;&lt;span style="font-family: Times New Roman,serif;"&gt;&lt;span style="font-size: small;"&gt;Grain mineral composition is important for the establishment of appropriate fertilizer levels, as well as to define the nutritional quality of food and physiological quality of seeds. The objective of this study was to evaluate the effect of ammonium sulfate (AS) and trinexapac-ethyl rates on mineral composition of wheat grains (&lt;em&gt;Triticum aestivum&lt;/em&gt; L.) cv. Pioneiro. The experiment was carried out in Vi&amp;ccedil;osa, Minas Gerais State, Brazil, from June to October 2006. The treatments consisted of five AS rates (150 kg ha&lt;sup&gt;-1&lt;/sup&gt;, 300 kg ha&lt;sup&gt;-1&lt;/sup&gt;, 450 kg ha&lt;sup&gt;-1&lt;/sup&gt;, 600 kg ha&lt;sup&gt;-1&lt;/sup&gt;, and 750 kg ha&lt;sup&gt;-1&lt;/sup&gt;) combined with four trinexapac-ethyl rates (0 g ha&lt;sup&gt;-1&lt;/sup&gt;, 62.5 g ha&lt;sup&gt;-1&lt;/sup&gt;, 125 g ha&lt;sup&gt;-1&lt;/sup&gt;, and 187.5 g ha&lt;sup&gt;-1&lt;/sup&gt;). The experiment was arranged in a randomized block design with four replications. AS rates increased the concentrations of total-N (protein), Ca, S, Cu, and Zn and decreased the concentrations of P, K, and Mn (at AS rates above 457 kg ha&lt;sup&gt;-1&lt;/sup&gt;). The Mg and Fe concentrations were not influenced by AS rates. Trinexapac-ethyl increased total-N, P, and Mn; reduced Ca; and had no influence on the concentrations of K, S, Cu, Zn, Mg, and Fe. It can be concluded that AS application improves the nutritional quality of grains, while the use of the growth retardant trinexapac-ethyl has no influence on its mineral composition.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt; &lt;p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"&gt;&lt;span style="color: #000000;"&gt;&lt;span style="font-family: Times New Roman,serif;"&gt;&lt;span style="font-size: small;"&gt;KEY-WORDS: &lt;em&gt;Triticum aestivum&lt;/em&gt; L.; nutrition; growth retardant.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;