SOYBEAN YIELD AND MECHANICAL RESISTANCE TO SOIL PENETRATION UNDER NO-TILLAGE IN THE BRAZILIAN SAVANNAH PRODUTIVIDADE DA SOJA E RESISTÊNCIA MECÂNICA À PENETRAÇÃO DO SOLO SOB SISTEMA PLANTIO DIRETO NO CERRADO BRASILEIRO

SOYBEAN YIELD AND MECHANICAL RESISTANCE TO SOIL PENETRATION UNDER NO-TILLAGE IN THE BRAZILIAN SAVANNAH PRODUTIVIDADE DA SOJA E RESISTÊNCIA MECÂNICA À PENETRAÇÃO DO SOLO SOB SISTEMA PLANTIO DIRETO NO CERRADO BRASILEIRO

<p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif...

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Bibliographic Details
Main Authors: Juliana Teodora de Assis, Fabiana Lima Abrantes, Daniele Romano, Débora Cristiane Nogueira, Morel de Passos Carvalho, Flávio Carlos Dalchiavon, Mário Sérgio de Oliveira
Format: Article
Language:English
Published: Universidade Federal de Goiás 2011-01-01
Series:Pesquisa Agropecuária Tropical
Subjects:
Glycine max, componentes de produção da soja
agricultura de precisão
manejo do solo
índice de cone
Online Access:http://www.revistas.ufg.br/index.php/pat/article/view/8351
Description
Summary:&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;The mechanical resistance to soil penetration can be a negative influence to soybean root growth, greatly affecting its yield. In the agricultural year 2008/2009, in Selv&amp;iacute;ria, Mato Grosso do Sul State, in the Brazilian Savannah, the soybean yield was analyzed in relation to the mechanical resistance to soil penetration, in a Dystropherric Red Latosol (Typic Acrustox) under no-tillage. The main purpose was to select, among the soil attributes, the one that best presented spatial and linear correlation to explain the soybean yield variability. A geostatistical grid was installed to collect the soil and plant data, with 120 sampling points, in an area of 8.34 ha and homogeneous slope of 0.055 m m&lt;sup&gt;-1&lt;/sup&gt;. Thus, in order to support future researches concerning precision agriculture, based on the same soil&amp;rsquo;s attributes used for this study, the values for spatial dependence range should be placed between 38.1 m and 114.7 m. From the linear point of view, the mechanical resistance to soil penetration, when evaluated in the 0.10-0.20 m layer, showed good inverse exponential correlation with the soybean yield. However, from the spatial point of view, the number of pods per plant showed to be a good indicator for soybean yield.&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="en-US" 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;Glycine max, &lt;/em&gt;soybean production components; precision agriculture; soil management; cone index.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;<br>&lt;p style="text-align: justify !important;"&gt;&lt;span style="color: #000000;"&gt;&lt;span style="font-family: Verdana, sans-serif;"&gt;&lt;span style="font-size: x-small;"&gt;&lt;span&gt;A resistência mecânica à penetração do solo pode influenciar, negativamente, o crescimento radicular da soja, afetando, sobremaneira, sua produtividade. No ano agrícola 2008/2009, no município de Selvíria (MS), no Cerrado brasileiro, foi analisada a produtividade da soja, em função da resistência mecânica à penetração de um Latossolo Vermelho distroférrico, no sistema de semeadura direta. O objetivo foi selecionar, entre os atributos pesquisados do solo, aquele com a melhor correlação, linear e espacial, para explicar a variabilidade da produtividade da soja. Foi instalada uma malha geoestatística, para a coleta de dados do solo e da planta, com 120 pontos amostrais, em área de 8,34 ha e declive homogêneo de 0,055 m m&lt;sup&gt;-1&lt;/sup&gt;. Dessa forma, visando-se a auxiliar futuros trabalhos voltados à agricultura de precisão, os quais venham a utilizar os mesmos atributos do presente estudo, os valores dos alcances da dependência espacial a serem empregados deverão estar compreendidos entre 38,1 m e 114,7 m. Do ponto de vista linear, a resistência mecânica à penetração do solo, quando avaliada na camada 0,10-0,20 m, apresentou boa correlação exponencial inversa com a produtividade de grãos de soja. Entretanto, do ponto de vista espacial, o número de vagens por planta apresentou-se como bom indicador da produtividade de grãos de soja.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt; &lt;p class="western"&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;span style="font-family: Verdana, sans-serif;"&gt;&lt;span style="font-size: x-small;"&gt;&lt;span lang="pt-BR"&gt;&lt;span&gt;&lt;span&gt;&lt;span&gt;PALAVRAS-CHAVE: &lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;em&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;span style="font-family: Verdana, sans-serif;"&gt;&lt;span style="font-size: x-small;"&gt;&lt;span lang="pt-BR"&gt;&lt;span&gt;&lt;span&gt;&lt;span&gt;Glycine&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/em&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;span style="font-family: Verdana, sans-serif;"&gt;&lt;span style="font-size: x-small;"&gt;&lt;span lang="pt-BR"&gt;&lt;span&gt;&lt;span&gt;&lt;span&gt; &lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;em&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;span style="font-family: Verdana, sans-serif;"&gt;&lt;span style="font-size: x-small;"&gt;&lt;span lang="pt-BR"&gt;&lt;span&gt;&lt;span&gt;&lt;span&gt;max, &lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/em&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;span style="font-family: Verdana, sans-serif;"&gt;&lt;span style="font-size: x-small;"&gt;&lt;span lang="pt-BR"&gt;&lt;span&gt;&lt;span&gt;&lt;span&gt;componentes de produção da soja; agricultura de precisão; manejo do solo; índice de cone.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&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"&gt;&lt;span style="font-family: 'Times New Roman', serif; font-size: x-small;"&gt;&lt;br /&gt;&lt;/span&gt;&lt;/p&gt;
ISSN:1983-4063

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