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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1986.tde-20220207-232349
Document
Author
Full name
Isabel Etsue Eimori
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 1986
Supervisor
Title in Portuguese
Efeitos do nitrogênio, fósforo, potássio e magnésio no crescimento, composição mineral e qualidades tecnológicas do sorgo sacarino (Sorghum bicolor L. Moench. cv. Brandes)
Keywords in Portuguese
COMPOSIÇÃO QUÍMICA
CRESCIMENTO VEGETAL
FERTILIZANTES NPK
MAGNÉSIO
QUALIDADE TECNOLÓGICA
SORGO AÇUCAREIRO
Abstract in Portuguese
Em experimentos independentes foi estudado o efeito de níveis de K, K e Mg, N, P e K no crescimento, composição mineral e características tecnológicas do sorgo sacarino cultivado em solução nutritiva, usando-se a cultivar Brandes. Os dados obtidos mostraram que a produção de colmos foi influenciada positivamente pelo suprimento de N, P e K, tendo havido menor influência do Mg. Com relação ao nitrogênio, fósforo e potássio, conclui-se que as três premissas básicas da diagnose foliar foram satisfeitas e que os valores obtidos refletem o estado nutricional tão bem quanto relações entre pares de elementos. São considerados como adequados os seguintes níveis foliares determinados em folhas medianas correspondente a uma produção relativa de colmo igual a 90%: N - 3,0% P - 0,16% K - 2,90%. O rendimento alcoólico estimado diminuiu com a carência de N e P, e principalmente com o menor suprimento de K.
Title in English
Effects of nitrogen, phosphorus, potassium and magnesium on growth, mineral composition and technological characteristics of sweet sorghum (Sorghum bicolor L. Moench., cv. Brandes)
Abstract in English
In independent successive experiments the effects of several levels of K, K and Mg, N, P and K, on growth, mineral composition and technological characteristics of sweet sorghum were studied under nutrient solution conditions, the cultivar Brandes being used throughout. Stalk production was positively affected by raising the supply of N, P, and K, with lesser influence due to Mg. With respect to N, P, and K, it was concluded that the three basic premises of foliar diagnosis were obeyed, the obsolente content of the elements in the leaves assessing the nutritional status equally well as the ratios between the percentages of pairs of elements. The following levels of the elements in medium high leaves sampled, at tillering boot stage, are considered as adequate to give 90% of the maximum yield: N - 3.0% P - 0.16% K - 2.90%. The estimated alcoholic yield decreased with the deficiencies of both N and P, and especially with lower K supply.
 
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Publishing Date
2022-02-07
 
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