EFFECT OF Glomus intraradices ASSOCIATED WITH DIFFERENT GENOTYPES OF Phaseolus vulgaris (COMMON BEAN) IN TWO SOIL TYPES

摘要

The objective of this research was to evaluate three bean seed varieties {Phaseolus vulgaris) Bayo Mecentral, Flor de Durazno and Bayomex. Sewage water is used for irrigation, which creates problems and opportunities. It is an option to reduce stress on limited fresh water and help to meet the nutrient requirement of crop, but also produces contamination. In the Irrigation District 028, Tulancingo, Hidalgo, Mexico, forage for cattle has been irrigated with residual water for several years. To evaluate the level of contamination of two plots, one hectare was irrigated with sewage water and another with underground water. Soil was collected for a greenhouse experiment with different genotypes of common beans {Phaseolus vulgaris) to observe its growth, inoculating their seed with Glomus intraradices in two soil types. The experiment used a completely randomized block design in a factorial arrangement (3×2×2). In soil the contamination of Cu, Cr, and Ni are bellow the established limits for contaminants. Pb was not found. A comparison of soil irrigated with clean water or sewage water indicated that Cu is nearly twice as concentrated in soil irrigated by contaminated water; Ni is slightly greater, Cr is more abundant. In all the registered variables, the plant inoculated with Glomus intraradices showed significantly greater values (p≤0.01) than the plants without inoculation. Irrigation with residual water generally had no significant effect, even when there were higher numerical values in growth and in yield of the bean plants, except for the stem diameter, with significant differences (p≤0.05).