Potassium fertilization effects on isoflavone concentrations in soybean [Glycine max (L.) Merr.].
J Agric Food Chem
; 50(12): 3501-6, 2002 Jun 05.
Article
em En
| MEDLINE
| ID: mdl-12033818
ABSTRACT
Soybean isoflavone concentrations vary widely, but the contribution of soil fertility and nutrient management to this variability is unknown. Field experiments from 1998 to 2000 on soils with low to high exchangeable potassium (K) concentrations evaluated K application and placement effects on isoflavone concentrations and composition of soybean in various tillage and row-width systems. Soybean seed yield and concentrations of daidzein, genistein, glycitein, leaf K, and seed K were measured. Significant increases in daidzein, genistein, and total isoflavone were observed with direct deep-banded K or residual surface-applied K on low-K soils. Positive effects of K fertilization on isoflavones were less frequent on medium- to high-testing K soils. Both individual and total isoflavones were often positively correlated with seed yield, leaf K, and seed K on low-K soils. Appropriate K management could be an effective approach to increase isoflavone concentrations for soybeans produced on low- to medium-K soils.
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Base de dados:
MEDLINE
Assunto principal:
Potássio
/
Glycine max
/
Fertilizantes
/
Isoflavonas
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article