Inoculación de cepas de bacterias endófitas diazotróficas en el crecimiento de plantines de Solanum lycopersicum L. var. Río Grande
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Date
2020
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Universidad Nacional de Trujillo
Abstract
La presente investigación se realizó entre los meses de marzo y junio del 2019, en la Escuela de Agronomía, Facultad de Ciencias Agropecuarias de la Universidad Nacional de Trujillo, ubicada en la Provincia de Trujillo, Región La Libertad. El objetivo fue determinar el efecto de la inoculación de 10 cepas de bacterias endófitas diazotróficas en el crecimiento de plantines de Solanum lycopersicum L. var. Río Grande. Se empleó un diseño de bloques completos al azar con 5 bloques, 11 tratamientos y 4 plantas por unidad experimental. Los tratamientos estuvieron conformados por 10 cepas de Bacillus spp. procedentes de diferentes cultivos de la colección de bacterias endófitas diazótrofas del Laboratorio de Suelos de la Escuela Profesional de Agronomía de la Universidad Nacional de Trujillo. Los datos obtenidos fueron sometidos a un análisis de varianza (ANVA) y a la prueba de comparación de medias de Tukey, ambas con un nivel de confianza de 95% (p<0.05). Se determinó que la inoculación con la cepa de Bacillus spp. LASFBP044 incrementó en forma significativa la altura de planta, diámetro del tallo, número de hojas, peso fresco aéreo y total, materia seca aérea y total de plantines de Solanum lycopersicum L. var. Río Grande. La cepa LASFBP076 afectó sólo la acumulación de materia seca aérea y total. Ninguna de las cepas inoculadas afectó el área foliar, el peso fresco radicular, ni la acumulación de materia seca radicular.
ABSTRACT The present investigation was carried out between the months of March and June of 2019, at the School of Agronomy, Faculty of agricultural sciences of the National University of Trujillo, located in the Province of Trujillo, La Libertad Region. The objective was to determine the effect of the inoculation of 10 strains of endocytic diazotrophic bacteria on the growth of seedlings of Solanum lycopersicum L. var. Rio Grande. A randomized complete block design with 5 blocks, 11 treatments and 4 plants per experimental unit was used. The treatments consisted of 10 strains of Bacillus spp. from different cultures of the collection of endocritical diazotropic bacteria from the Soil Laboratory of the Professional School of Agronomy of the National University of Trujillo. The data obtained were subjected to an analysis of variance (ANVA) and to the Tukey means comparison test, both with a 95% confidence level (p <0.05). It was determined that inoculation with the strain of Bacillus spp. LASFBP044 significantly increased plant height, stem diameter, number of leaves and fresh and aerial fresh weight, aerial dry matter and total seedlings of Solanum lycopersicum L. var. Rio Grande. The LASFBP076 strain affected only the accumulation of aerial and total dry matter. None of the inoculated strains affected the leaf area or the accumulation of fresh root weight and dry root matter.
ABSTRACT The present investigation was carried out between the months of March and June of 2019, at the School of Agronomy, Faculty of agricultural sciences of the National University of Trujillo, located in the Province of Trujillo, La Libertad Region. The objective was to determine the effect of the inoculation of 10 strains of endocytic diazotrophic bacteria on the growth of seedlings of Solanum lycopersicum L. var. Rio Grande. A randomized complete block design with 5 blocks, 11 treatments and 4 plants per experimental unit was used. The treatments consisted of 10 strains of Bacillus spp. from different cultures of the collection of endocritical diazotropic bacteria from the Soil Laboratory of the Professional School of Agronomy of the National University of Trujillo. The data obtained were subjected to an analysis of variance (ANVA) and to the Tukey means comparison test, both with a 95% confidence level (p <0.05). It was determined that inoculation with the strain of Bacillus spp. LASFBP044 significantly increased plant height, stem diameter, number of leaves and fresh and aerial fresh weight, aerial dry matter and total seedlings of Solanum lycopersicum L. var. Rio Grande. The LASFBP076 strain affected only the accumulation of aerial and total dry matter. None of the inoculated strains affected the leaf area or the accumulation of fresh root weight and dry root matter.
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Keywords
Tomate, Bacteria, Endófitas, Diazotróficas, Inoculación