Efecto de la aplicación de sustancias húmicas y rizobacterias en fruto de frambuesa

Mexico is an important producer in the cultivation of raspberries (Rubus idaeus L.); nevertheless,intensive agriculture poses serious problems, such as the decrease in soil fertility due to theindiscriminate use of chemical fertilizers and pesticides, and biotechnological alternatives favorableto the environment are sought. This research aimed to evaluate the effect of a biostimulant withhumic substances and rhizobacteria on agronomic and quality variables in raspberry fruits. Theresearch was conducted in 2021 in a greenhouse of the Department of Horticulture at the AntonioNarro Autonomous Agrarian University in Saltillo, Coahuila, Mexico. The following treatments wereused: 1) fulvic acids and mixture of microorganisms; 2) humic acids and Pseudomonas fluorescens;3) fulvic acids and Azospirillum; 4) fulvic acids and Pseudomonas fluorescens; 5) mixture of humicacids and fulvic acids plus Azospirillum and the control, with two different doses: D1) humicand fulvic acids: 3 ml and 5 ml microorganism; D2) humic acid or fulvic acid 3.5 ml and 4 mlmicroorganism, with four replications per treatment. Plant height increased with AFyAzoz d1 by24.3%, fruit weight was favored by AFyMM d2 by 37.8%, yield increased with AFyPF d2 by 78.2%,TSS with AFyMM d1 by 23%, vitamin C increased by 20% with the application of AFyPF d2. In theprincipal component analysis, there was a positive correlation between the number of fruits andplant height (r= 0.94**), yield and number of fruits (r= 0.91**). Biostimulants with rhizobacteria andhumic substances are a biotechnological alternative to be applied to raspberry crops