Pesquisa Agropecuária Tropical (Jan 2011)

SISTEMAS DE MANEJO DO SOLO: SOJA [Glycine max (L.)] CONSORCIADA COM Brachiaria decumbens (STAPF) SOIL MANAGEMENT SYSTEMS: SOYBEAN [Glycine max (L.)] INTERCROPPED WITH Brachiaria decumbens (STAPF)

  • Emanuel da Silva Barros,
  • João Paulo Araújo dos Santos,
  • Alisson Douglas da Silva,
  • Rafael de Oliveira Souza,
  • Abel Washingthon de Albuquerque,
  • Rodrigo Gomes Pereira,
  • Priscilla Vanúbia Queiroz de Medeiros

DOI
https://doi.org/10.5216/pat.v41i1.6981
Journal volume & issue
Vol. 41, no. 1

Abstract

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<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;"><span style="font-size: x-small;"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">Objetivou-se, com este trabalho, avaliar o efeito de diferentes sistemas de manejo do solo sobre os componentes de produ&ccedil;&atilde;o da soja cultivada solteira e em cons&oacute;rcio com </span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;"><em>B. decumbens</em></span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">, nos Tabuleiros Costeiros do Estado de Alagoas. </span></span><span style="font-family: Courier New,monospace;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">Os tratamentos consistiram no cultivo</span></span></span></span></span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;"> da variedade de soja Monsoy 9350, nos sistemas preparo convencional do solo, cultivo m&iacute;nimo e plantio direto. O delineamento experimental utilizado foi o em blocos casualizados, com parcelas subdivididas (com e sem </span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;"><em>B. decumbens</em></span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">),</span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;"><em> </em></span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">e quatro repeti&ccedil;&otilde;es. As vari&aacute;veis analisadas foram: 1) cultura da soja: determina&ccedil;&atilde;o dos est&aacute;gios fenol&oacute;gicos, composi&ccedil;&atilde;o qu&iacute;mica das plantas, estande de plantas, di&acirc;metro do colmo, altura de plantas, altura de inser&ccedil;&atilde;o da primeira vagem, n&uacute;mero de vagens por planta, n&uacute;mero de gr&atilde;os por vagem, n&uacute;mero de gr&atilde;os por planta, massa de 1.000 gr&atilde;os e produtividade; e 2) </span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;"><em>B. decumbens</em></span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">: composi&ccedil;&atilde;o qu&iacute;mica das plantas, al&eacute;m do ac&uacute;mulo de mat&eacute;ria seca, em cinco &eacute;pocas de amostragens. Os sistemas de manejo do solo influenciaram o estande de plantas e a concentra&ccedil;&atilde;o de P, Cu, Fe e Zn, na soja, al&eacute;m do S, na </span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;"><em>Brachiaria decumbens</em></span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">. O sistema plantio direto apresentou maior produtividade de gr&atilde;os e produ&ccedil;&atilde;o de fitomassa de </span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;"><em>B. decumbens</em></span></span><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">, nas condi&ccedil;&otilde;es edafoclim&aacute;ticas de Rio Largo (AL).</span></span></span></span></span></p> <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;"><span style="font-size: small;"><span style="color: #000000;"><span style="text-decoration: none;"><span lang="pt-BR"><span style="font-style: normal;"><span style="font-weight: normal;">PALAVRAS-CHAVE: Plantio direto; integra&ccedil;&atilde;o lavoura-pecu&aacute;ria; cultivo m&iacute;nimo.</span></span></span></span></span></span></span></span></p><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;"><span style="font-size: x-small;"><span style="font-size: small;">The aim of this study was to evaluate the effects of different soil management systems on the soybean yield components intercropped or not with </span><span style="font-size: small;"><em>Brachiaria decumbens</em></span><span style="font-size: small;">, in the coastal plateau of the Alagoas State, Brazil. For that, the 9350 Monsoy soybean was cultivated under conventional tillage, minimum tillage, and no-tillage. The experiment was carried out by using a split-plot randomized blocks design (with and without </span><span style="font-size: small;"><em>B. decumbens</em></span><span style="font-size: small;">) and four replications. The variables analyzed were: 1) soybean: determination of phenological stages, chemical composition of plants, stand of plants, stem diameter, plant height, first pod insertion height, number of grains per pod, number of pods, number of grains per plant, mass of 1,000 grains, and yield; and 2) </span><span style="font-size: small;"><em>B. decumbens</em></span><span style="font-size: small;">: chemical composition of plants and accumulation of dry matter, in five different sampling times. The soil management systems influenced the stand of plants and the </span><span style="font-size: small;">concentration of P, Cu, Fe, and Zn, in soybean, besides S, in </span><span style="font-size: small;"><em>B. decumbens</em></span><span style="font-size: small;">.</span><span style="font-size: small;"> The </span><span style="font-size: small;">no-tillage system showed higher grain and biomass yield for </span><span style="font-size: small;"><em>B. decumbens</em></span><span style="font-size: small;">,</span><span style="font-size: small;"><em> </em></span><span style="font-size: small;">under the </span><span style="font-size: small;">edaphoclimatic </span><span style="font-size: small;">conditions of Rio Largo, Alagoas State, Brazil.</span></span></span></span></p> <p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="en-US" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">KEY-WORDS:<strong> </strong>No-tillage; crop-livestock integrated system; minimum tillage.</span></span></span></p>

Keywords