Assessing the Nutritional Effect of Lupinus montanus on Zea mays HS-2 (Intercropping) and Identification of Nodular Bacteria through the Use of Rhizotrons

Abstract

Maize (Zea mays sp.) is one of the most important basic grains in our diets, and it requires high levels of nitrogen and phosphorus for optimum growth. However, phosphorous transitions in forms inaccessible to plants. The Lupinus genus, and more specifically, Lupinus albus, through its root clusters, or proteoid roots, has the ability to solubilize portions of phosphorous when it is found in a limited environment. The objective of the current study was to evaluate the effect of Lupinus montanus under phosphorous stress conditions intercropped with maize, utilizing sandy soils with calcium phosphate bands. Work was conducted in growth chambers using rhizotrons, which allowed the authors to observe the growth and root behavior of both species (Lupinus montanus and maize). The phosphorus analysis in the plant tissue indicated that its concentration in maize was slightly higher in intercropping conditions than in monoculture planting. From this, we concluded that Lupinus montanus is capable of solubilizing portions of phosphorus, making it available for other crops; likewise, we also observed that the proteoid structures did not develop, leaving the study open for other wild species. In conclusion, the use of Lupinus montanus will be as an alternative in favor of more sustainable agricultural methods since it improve soil fertility in phosphorus deficient soils.