| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Solo
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| País: |
Brazil
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| Título: |
Potassium Fertilization of Eucalyptus in an Entisol in Low-Elevation Cerrado
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| Autores: |
Gazola,Rodolfo de Niro
Buzetti,Salatiér
Teixeira Filho,Marcelo Carvalho Minhoto
Gazola,Raíssa Pereira Dinalli
Celestrino,Thiago de Souza
Silva,Alexandre Costa da
Silva,Paulo Henrique Müller da
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| Data: |
2019-01-01
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| Ano: |
2019
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| Palavras-chave: |
Senescent leaf nutrients
Fertilization
Biomass
Macronutrients
Nutritional efficiency
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| Resumo: |
ABSTRACT Potassium (K) is one of the most highly accumulating nutrients in Eucalyptus and, consequently, is heavily exported by the harvesting of wood. Moreover, its availability in the soil in most Brazilian plantation areas is very low, especially in the regions of the Cerrado biome, which has soils with low natural fertility and marked water deficits, implying a lack of nutrient supply and, consequently, a less efficient water use. Our objective was to evaluate the effects of K fertilization on Eucalyptus biomass yield, the addition of nutrients to the soil by leaf deposition, nutrient use efficiency, and soil K availability. The experiment was conducted with clone I144 (Eucalyptus urophylla) in the municipality of Três Lagoas/MS, in a Neossolo Quartzarênico Órtico (Entisol). The experimental design was a randomized block with four treatments and five replicates. The treatments consisted of four K doses (0, 90, 135, and 180 kg ha-1 of K2O) as KCl. Plant biomass production (leaves, branches, trunk, and bark), senescent leaf deposition, leaf nutrient concentrations, nutrient accumulation in the different plant compartments, nutrient use efficiency, addition of nutrients to the soil by leaf deposition, and soil K availability were evaluated. Potassium fertilization increased the biomass yield of Eucalyptus plants, senescent leaf K content, the transfer of K to the soil, the accumulation of K in the aerial plant parts, and the K content in the soil. However, it did not influence senescent leaf deposition yield or plant K use efficiency.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100505
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| Editor: |
Sociedade Brasileira de Ciência do Solo
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| Relação: |
10.1590/18069657rbcs20180085
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Ciência do Solo v.43 2019
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| Direitos: |
info:eu-repo/semantics/openAccess
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