Disponibilidade de enxofre em solos brasileiros. VI. Avaliação conjunta das análises de solos e plantas em função da produção de matéria seca e absorção de enxofre pelo milho
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Data
1994-12
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Editor
Antônio Henrique Garcia
Resumo
A greenhouse experiment was carried out with surface samples from States of São Paulo, Minas Gerais and Goiás (Brazil). Caroon contents varied from 0.5 to 3.03 5, sulphurfrom 0.0104 to 0.0310% and clay from 8 to 60%. Com (Zea maysL.) was grown in two successives crops, with three rates of gypsum (O, 20 and 40 ppm S), previously incubated in absence and presence of lime. Soil analyses were made before and alter the first cropping. Plant material was analysed alter each harvest of the top. By using data from both soil and plant analyses multiple regression equations were calculated. Ciose relationships were found in the following cases: sandy soils: dry matter production as a function of total S e N/S ratio in the plants and extractable S-SO, in the soil; accumulation of S in the plants as related to the sarne variables and soil pH; clayey soils: dry matter as a function of total S and N/S ratio in plants and pH, ea-, Mg-, W+Al- and carbon in soils; accumulation of S in the plants as against their N/S an P/S ratios, and calei um phosphate extractable S-SO ,- , pH, W + AI- and carbon in the soils. ln sandy soils, sulphur availbility deppends only on extractable sulphur contents, being unaffected by !iming; em clayey soils, it is influenced by liming (pH and CEC) and carlxm contents. lndependently of texture and carbon content of the soils, dry matter yield and sulphur uptake show inverse relationships with com leaf tissue N/S and P/S ratios
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Palavras-chave
Enxofre, Solo/planta, Regressão múltipla, Análise conjunta, Sulphur, Soil-plant, Multiple regression, Joint analysis
Citação
KLIEMANN, Huberto José; MALAVOLTA, Eurípedes. Disponibilidade de enxofre em solos brasileiros. VI. Avaliação conjunta das análises de solos e plantas em função da produção de
matéria seca e absorção de enxofre pelo milho. Anais da Escola de Agronomia e Veterinária, Goiânia, v. 24, n. 1, p. 36-48, jan./dez. 1994. Disponível em: <https://www.revistas.ufg.br/pat/article/view/2648/2696>.