Lixiviação de nitrato em função de lâminas de irrigação em um solo argiloso e em um solo arenoso
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Data
2015
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Resumo
This study aimed to evaluate the influence of applied water levels on nitrate leaching on
undisturbed soil columns (144 mm diameter and 300 mm high) filled with a clay and a sandy
soil in soil column. The experiment was conducted in a greenhouse in Urutaí, Goiás. The columns were arranged in a randomized complete block design with three replications. Calcium
nitrate, with 15.5% of Total Nitrogen (N), was used as source of Nitrogen. Water depths equal
to 50%, 100%, 150% and 200% of water depth corresponding to the mass difference of 100%
treatment column were applied. This difference was calculated between the mass at field
capacity and the current mass (time to carry out irrigation). Irrigation depths were applied every
three days for a period of 81 days. Joint analysis was performed of data according to the time
factor. It was later set a full second degree response surface model for the study of time and
water factors for each type of soil. The movement of N-NO 3 varied depending on the soil type
and irrigation levels, with the greater and more rapid upward mobility occurred in sandy soil
from the ground clay.
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Palavras-chave
Colunas indeformadas de solo, Textura do solo, Manejo da água, Undisturbed soil cores, Soil texture, Water management
Citação
MENDES, Walter da Costa; ALVES JÚNIOR, José; CUNHA, Paulo César Ribeiro da; SILVA, Anderson Rodrigo da; EVANGELISTA, Adão Wagner Pêgo; CASAROLI, Derblai. Lixiviação de nitrato em função de lâminas de irrigação em um solo argiloso e em um solo arenoso. Irriga, Botucatu, v. 1, n. 2, p. 158-166, 2015.