El presente trabajo de investigación se desarrolló en la estación experimental “El Choclino” localizado en el distrito de la Banda de Shilcayo. Con el objetivo general de contribuir al conocimiento de los hongos micorrízicos arbusculares presentes en la rizósfera de genotipos promisorios de cacao (Theobroma cacao L.) en dos sistemas de producción en la región San Martín; donde, se determinó la colonización radicular, cuantificó la población e identificó los hongos micorrizicos arbusculares a nivel de género. Para este trabajo las muestras fueron colectadas en dos épocas del año y se utilizó un diseño de Bloques Completo Randomizado (DBCR) con tres repeticiones, el cual fueron ajustados al arreglo factorial 2 x11, Los factores y sus niveles de estudio fueron: Sistema de producción (Sistema bajo bosque y sistema tradicional); y Genotipos de cacao (ICT-2142, CCN-51, I...

The current research is developed at the experimental farm “El Choclino” ubicated in the district of Banda de shilcayo. This work was done in order to contribute to the widespread knowledge about Arbuscular Mycorrhizal fungi which is found in rhizosphere of promising genotype of cacao and which is also produced by two different systems of production in the district of San Martin, where its colonization area was identified, its population was quantified and Arbuscular Mycorrhizal fungi and its gender was determined. Many samples were collected in two periods of the year and a Randomized Complete Block Design (RCBD) with three replicates was used which was adjusted to factorial arrangement 2 X11. Different factors and levels of studies were the followings: systems of production (Low forest system and traditional system) ; genotypes of cacao (ICT – 2142, CCN – 51, ICT – 1112 , ICT...

Rice feeds more than 50% of the population worldwide, representing a great energy contribution in low-income families. The exaggerated use of synthetic chemical fertilizers to maintain high levels of yield causes alterations in the physical, chemical and biological quality of the soils. A sustainable alternative is the use of beneficial microorganisms that promote plant growth in crops. The objective of the study was to isolate and evaluate the Plant Growth Promoting (PGP) traits of rhizospheric rice bacteria in soils of the San Martin region, evaluate the effect of promoting growth in rice under pot experiments conditions and finally evaluate the effect of selected strains on the yield under different doses of nitrogen fertilizer under field conditions. Initially, 27 strains were selected for their diazotrophic characteristics and characterized by PGP traits. Through a multivariate anal...