ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATION

ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATION

<p style="text-align: justify !important;"><span><span lang="pt-BR">A baixa disponibilidade de P e o estresse hídrico estão entre os fatores que mais têm limitado a produção agrícola em solos de regiões tropicais. Com base nisto, conduziu...

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Main Authors: Douglas Alexandre Saraiva Leão, Antonio Lucineudo Oliveira Freire, José Romilson Paes de Miranda
Format: Article
Language:English
Published: Universidade Federal de Goiás 2011-01-01
Series:Pesquisa Agropecuária Tropical
Subjects:
Sorghum bicolor (L.) Moench.
tolerância à seca
nutrição mineral
forrageira
Online Access:http://www.revistas.ufg.br/index.php/pat/article/view/8285
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author Douglas Alexandre Saraiva Leão
Antonio Lucineudo Oliveira Freire
José Romilson Paes de Miranda
author_facet Douglas Alexandre Saraiva Leão
Antonio Lucineudo Oliveira Freire
José Romilson Paes de Miranda
author_sort Douglas Alexandre Saraiva Leão
collection DOAJ
description &lt;p style="text-align: justify !important;"&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt;A baixa disponibilidade de P e o estresse hídrico estão entre os fatores que mais têm limitado a produção agrícola em solos de regiões tropicais. Com base nisto, conduziu-se um experimento, com o objetivo de avaliar o efeito do estresse hídrico e de doses de fósforo no acúmulo de nutrientes na parte aérea de plantas de sorgo (Sorghum bicolor (L.) Moench.), cultivar BR-304, de ciclo médio. O delineamento experimental foi o de blocos casualizados, em esquema fatorial 2x4, com 4 repetições, sendo dois regimes hídricos (com e sem estresse hídrico) e quatro doses de fósforo (0 mg dm&lt;/span&gt;&lt;/span&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;sup&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;-3 &lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt;,&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt; 50 mg dm, 100 mg dm&lt;/span&gt;&lt;/span&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;sup&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;-3&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt; e 150 mg dm&lt;/span&gt;&lt;/span&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;sup&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;-3&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt; ). As plantas foram mantidas em vasos com capacidade para 9 kg de solo e o estresse hídrico foi imposto aos 45 dias após a emergência e persistiu até que fossem observados a parada do crescimento e o enrolamento das folhas do ápice. O estresse hídrico reduziu o acúmulo de K na parte aérea das plantas e a adubação fosfatada proporcionou aumento na absorção de N, P, Ca, S, Mn e Fe e redução na absorção de Zn. O fornecimento de P acima de 125 mg dm&lt;/span&gt;&lt;/span&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;sup&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;-3&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt; causou redução no acúmulo de macronutrientes nas plantas de sorgo.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt; &lt;p class="western"&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;&lt;span&gt;&lt;span lang="pt-BR"&gt;&lt;br /&gt;PALAVRAS-CHAVE: Sorghum bicolor (L.) Moench.; tolerância à seca; nutrição mineral; forrageira.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;br /&gt;<br>Low phosphorus availability and water stress are among the factors that have limited agricultural yield in soils of tropical regions. Based on that, an experiment was carried out to evaluate the effect of water stress and phosphorus levels on the nutrients accumulation in the shoots of sorghum plants (Sorghum bicolor (L.) Moench.), BR-304 mid-cycle cultivar. The experimental design was randomized blocks arranged in a 2x4 factorial scheme, being two water regimes (with and without water stress) and four phosphorus levels (0 mg dm-³, 50 mg dm-³, 100 mg dm-³, and 150 mg dm-3), with 4 replications. Plants were kept in pots (up to 9 kg of soil) and water stress was imposed 45 days after emergence, and persisted until growth stopped and apical leaves curled. Water stress reduced K accumulation and phosphorus fertilization increased the N, P, Ca, S, Mn, and Fe, and reduced the Zn absorption. The supply of P above 125 mg dm-3 reduced macronutrients accumulation in sorghum plants.&lt;br /&gt;&lt;br /&gt;KEY-WORDS: Sorghum bicolor (L.) Moench.; drought tolerance; mineral nutrition; forage plant.
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spelling doaj.art-7cec3c018b76475b90d2b5cc9bb97f912022-12-22T01:10:51ZengUniversidade Federal de GoiásPesquisa Agropecuária Tropical1983-40632011-01-0141110.5216/pat.v41i1.8285ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATIONDouglas Alexandre Saraiva LeãoAntonio Lucineudo Oliveira FreireJosé Romilson Paes de Miranda&lt;p style="text-align: justify !important;"&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt;A baixa disponibilidade de P e o estresse hídrico estão entre os fatores que mais têm limitado a produção agrícola em solos de regiões tropicais. Com base nisto, conduziu-se um experimento, com o objetivo de avaliar o efeito do estresse hídrico e de doses de fósforo no acúmulo de nutrientes na parte aérea de plantas de sorgo (Sorghum bicolor (L.) Moench.), cultivar BR-304, de ciclo médio. O delineamento experimental foi o de blocos casualizados, em esquema fatorial 2x4, com 4 repetições, sendo dois regimes hídricos (com e sem estresse hídrico) e quatro doses de fósforo (0 mg dm&lt;/span&gt;&lt;/span&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;sup&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;-3 &lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt;,&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt; 50 mg dm, 100 mg dm&lt;/span&gt;&lt;/span&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;sup&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;-3&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt; e 150 mg dm&lt;/span&gt;&lt;/span&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;sup&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;-3&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt; ). As plantas foram mantidas em vasos com capacidade para 9 kg de solo e o estresse hídrico foi imposto aos 45 dias após a emergência e persistiu até que fossem observados a parada do crescimento e o enrolamento das folhas do ápice. O estresse hídrico reduziu o acúmulo de K na parte aérea das plantas e a adubação fosfatada proporcionou aumento na absorção de N, P, Ca, S, Mn e Fe e redução na absorção de Zn. O fornecimento de P acima de 125 mg dm&lt;/span&gt;&lt;/span&gt;&lt;span style="color: #000000;"&gt;&lt;span&gt;&lt;sup&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;-3&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&lt;span lang="pt-BR"&gt; causou redução no acúmulo de macronutrientes nas plantas de sorgo.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt; &lt;p class="western"&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;&lt;span&gt;&lt;span lang="pt-BR"&gt;&lt;br /&gt;PALAVRAS-CHAVE: Sorghum bicolor (L.) Moench.; tolerância à seca; nutrição mineral; forrageira.&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;br /&gt;<br>Low phosphorus availability and water stress are among the factors that have limited agricultural yield in soils of tropical regions. Based on that, an experiment was carried out to evaluate the effect of water stress and phosphorus levels on the nutrients accumulation in the shoots of sorghum plants (Sorghum bicolor (L.) Moench.), BR-304 mid-cycle cultivar. The experimental design was randomized blocks arranged in a 2x4 factorial scheme, being two water regimes (with and without water stress) and four phosphorus levels (0 mg dm-³, 50 mg dm-³, 100 mg dm-³, and 150 mg dm-3), with 4 replications. Plants were kept in pots (up to 9 kg of soil) and water stress was imposed 45 days after emergence, and persisted until growth stopped and apical leaves curled. Water stress reduced K accumulation and phosphorus fertilization increased the N, P, Ca, S, Mn, and Fe, and reduced the Zn absorption. The supply of P above 125 mg dm-3 reduced macronutrients accumulation in sorghum plants.&lt;br /&gt;&lt;br /&gt;KEY-WORDS: Sorghum bicolor (L.) Moench.; drought tolerance; mineral nutrition; forage plant.http://www.revistas.ufg.br/index.php/pat/article/view/8285Sorghum bicolor (L.) Moench.tolerância à secanutrição mineralforrageira
spellingShingle Douglas Alexandre Saraiva Leão
Antonio Lucineudo Oliveira Freire
José Romilson Paes de Miranda
ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATION
Pesquisa Agropecuária Tropical
Sorghum bicolor (L.) Moench.
tolerância à seca
nutrição mineral
forrageira
title ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATION
title_full ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATION
title_fullStr ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATION
title_full_unstemmed ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATION
title_short ESTADO NUTRICIONAL DE SORGO CULTIVADO SOB ESTRESSE HÍDRICO E ADUBAÇÃO FOSFATADA MACRO AND MICRONUTRIENTS CONTENT OF SORGHUM UNDER WATER STRESS AND PHOSPHATE FERTILIZATION
title_sort estado nutricional de sorgo cultivado sob estresse hidrico e adubacao fosfatada macro and micronutrients content of sorghum under water stress and phosphate fertilization
topic Sorghum bicolor (L.) Moench.
tolerância à seca
nutrição mineral
forrageira
url http://www.revistas.ufg.br/index.php/pat/article/view/8285
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