Contribution of non-exchangeable potassium forms and its accumulation in corn plants
ABSTRACT The state of Paraíba, Brazil, has soils from well- to poorly-developed, in which potassium (K) is found in different levels, forms and, consequently, with varying availability to plants. The objective of this study was to evaluate the contribution of non-exchangeable K forms to corn plants in 12 soils from Paraíba state, along four successive cycles. The experimental design was completely randomized block with three replicates and the 24 treatments consisted of the combination between two K levels (0 and 100 mg dm-3) and 12 soils. Before and after each cycle, subsamples of 0.2 dm3 were collected in each pot for the determination of non-exchangeable K (Kne), exchangeable K (Ke) and soluble K (Ks). For each cycle, dry matter production, dry matter K content and plant K content (absorbed K) were determined. In the studied soils, the amounts of absorbed K after successive cycles were higher than the amounts of exchangeable K released, which shows the contribution of non-exchangeable K forms to corn nutrition.
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Departamento de Engenharia Agrícola - UFCG
2016
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oai:scielo:S1415-436620160001000092016-01-11Contribution of non-exchangeable potassium forms and its accumulation in corn plantsVieira,Montesquieu da S.Oliveira,Fábio H. T. deSantos,Hemmannuella C.Medeiros,Jailma dos S. de Northeastern soils mineralogy K forms K availability ABSTRACT The state of Paraíba, Brazil, has soils from well- to poorly-developed, in which potassium (K) is found in different levels, forms and, consequently, with varying availability to plants. The objective of this study was to evaluate the contribution of non-exchangeable K forms to corn plants in 12 soils from Paraíba state, along four successive cycles. The experimental design was completely randomized block with three replicates and the 24 treatments consisted of the combination between two K levels (0 and 100 mg dm-3) and 12 soils. Before and after each cycle, subsamples of 0.2 dm3 were collected in each pot for the determination of non-exchangeable K (Kne), exchangeable K (Ke) and soluble K (Ks). For each cycle, dry matter production, dry matter K content and plant K content (absorbed K) were determined. In the studied soils, the amounts of absorbed K after successive cycles were higher than the amounts of exchangeable K released, which shows the contribution of non-exchangeable K forms to corn nutrition.info:eu-repo/semantics/openAccessDepartamento de Engenharia Agrícola - UFCGRevista Brasileira de Engenharia Agrícola e Ambiental v.20 n.1 20162016-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100009en10.1590/1807-1929/agriambi.v20n1p9-15 |
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Vieira,Montesquieu da S. Oliveira,Fábio H. T. de Santos,Hemmannuella C. Medeiros,Jailma dos S. de |
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Vieira,Montesquieu da S. Oliveira,Fábio H. T. de Santos,Hemmannuella C. Medeiros,Jailma dos S. de Contribution of non-exchangeable potassium forms and its accumulation in corn plants |
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Vieira,Montesquieu da S. Oliveira,Fábio H. T. de Santos,Hemmannuella C. Medeiros,Jailma dos S. de |
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Vieira,Montesquieu da S. |
title |
Contribution of non-exchangeable potassium forms and its accumulation in corn plants |
title_short |
Contribution of non-exchangeable potassium forms and its accumulation in corn plants |
title_full |
Contribution of non-exchangeable potassium forms and its accumulation in corn plants |
title_fullStr |
Contribution of non-exchangeable potassium forms and its accumulation in corn plants |
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Contribution of non-exchangeable potassium forms and its accumulation in corn plants |
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contribution of non-exchangeable potassium forms and its accumulation in corn plants |
description |
ABSTRACT The state of Paraíba, Brazil, has soils from well- to poorly-developed, in which potassium (K) is found in different levels, forms and, consequently, with varying availability to plants. The objective of this study was to evaluate the contribution of non-exchangeable K forms to corn plants in 12 soils from Paraíba state, along four successive cycles. The experimental design was completely randomized block with three replicates and the 24 treatments consisted of the combination between two K levels (0 and 100 mg dm-3) and 12 soils. Before and after each cycle, subsamples of 0.2 dm3 were collected in each pot for the determination of non-exchangeable K (Kne), exchangeable K (Ke) and soluble K (Ks). For each cycle, dry matter production, dry matter K content and plant K content (absorbed K) were determined. In the studied soils, the amounts of absorbed K after successive cycles were higher than the amounts of exchangeable K released, which shows the contribution of non-exchangeable K forms to corn nutrition. |
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Departamento de Engenharia Agrícola - UFCG |
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2016 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100009 |
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