IDENTIFICATION OF BLACK COMMON BEAN BREEDING LINES ADAPTED TO ACID SOILS OF SOUTHERN VERACRUZ, MEXICO

摘要

In the area of Isla Plains and Juan Rodriguez Clara, located south of Veracruz, Mexico, beans are sown annually in low fertility acid soils, mainly Cambisols and Acrisols, of sandy texture, with pH lower than 5.0 and organic matter content less than 1.5%, which confer a low cation exchange capacity (Zetina et al, 2002). In this type of soil, low dry black bean seed yields are obtained, which may be lower than 300 kg ha"1, particularly when there is a combined effect of soil acidity and drought (Tosquy et al, 2008). The objective of this research was to identify black bean genotypes with adaptation to low fertility acid soils of southern Veracruz with high yield efficiency when grown with and without application of dolomitic lime.