ENDOMYCORRHIZAL INOCULATION EFFECT ON OAT (Avena sativa L.), BEANS (Phaseolus vulgaris L.), AND WHEAT (Triticum aestivum L.) GROWTH CULTIVATED IN TWO SOIL TYPES UNDER GREENHOUSE CONDITIONS

The objective of this research was to evaluate the effect of inoculation with Glomus intraradices on oat, beans, and wheat. The study was done under greenhouse conditions at the Montecillo Campus of the Postgraduate College, Mexico. Two soil types from San Luis Potosi State were used, one was red (Xerosol), and the other one was grey (Litosol). With and without Glomus intraradices inoculation. Three bean cultivars: Pinto Saltillo, Bayo comercial and Flor de Mayo; Chihuahua (oat variety); and Tlaxcala wheat were planted. The experimental design was factorial complete randomized block and three replications. The result showed that bean yield (average 3.7 g plant(-1)), pod number and dry weight, leaf area, plant height, stem diameter, and aerial part dry weight were positively affected by the inoculation with Glomus intraradices, but not by soil type. A similar trend was observed in root length, volume and dry weight and in the nodule number. In relation with the species studied, Phaseolus vulgaris varieties had higher values than wheat and oats in growth and yield variables evaluated. It is concluded that endomycorrhiza inoculation (Glomus intraradices) gave better growth and yield, especially in beans. The soil types studied did not affect significantly plant responses in this study.