Los abonos verdes son cultivos de cobertura, principalmente leguminosas de rápido crecimiento, que se siembran para mejorar la fertilidad y las propiedades físicas del suelo. Al descomponerse, liberan materia orgánica y nutrientes esenciales a para los cultivos posteriores. Además, tienen la capacidad de fijar nitrógeno atmosférico, ayudando a reducir el uso de fertilizantes químicos. En la región de San Martín, el uso de abonos verdes ha sido poco investigado, ya que actualmente no se dispone de referencias que respalden la existencia de estudios sobre esta práctica agrícola. La presente investigación se realizó en la Estación Experimental Agraria El Porvenir del INIA - San Martín, donde se evaluaron dos especies de leguminosas (Canavalia ensiformis y Crotalaria júncea) en el cultivo de arroz (Oryza sativa L.). Se implementaron tres tratamientos: Canavalia, Crotalaria y ...

The study was conducted in Juan Guerra district, province and region of San Martin, Peru; it assessed two treatment sets: (1) nitrogen fertilizer dose (FN75, FN100); (2) green manure Crotalaria juncea (CroJ), Canavalia ensiformis (CanE), and without green manure. It was arranged in a split-plot design with four replications. During the experiment, we observed an important fluctuation in soil parameters. Notably, there was a decrease in soil carbon and nitrogen levels, likely attributed to microorganism metabolism. On the other hand, we observed that CanE significantly reduced the diseased tillers through “White Leaf Virus” (RHBV) by 2.82% compared to the control, and significant panicle fertility was achieved by CroJ (91.88%). No significant differences were obtained in yields during this first campaign; however, the highest reported yield was 8.36 t ha-1 with the CanE - FN100 treatm...