Potencial agronómico, productivo, nutricional y económico de cuatro genotipos de maíz forrajero en el valle de Chancay, Perú

The objective of the research was to compare the agronomic, productive, nutritional and economic characteristics of four forage maize genotypes: INIA 617 Chuska, M28T Marginal 28 Tropical, Atlas 777 and INIA 619 Megahybrid, in the Chancay Valley - Peru. The four genotypes, with four replications each, were randomly distributed in 16 experimental units. Each experimental unit was represented by 16 rows of 29 m in length, spaced at 0.85 m, with a sowing distance between hits of 0.30 m and three seeds per hit. The agronomic characteristics were evaluated at 93 days of planting, while the productive, nutritional and economic yield were estimated at 110 days after planting. The INIA 617 and M28 genotypes reached the highest plant height, while INIA 619 and Atlas 777 showed the highest number of leaves and number of ears per plant, respectively. The maturity state factor of the forage only influenced the yield of neutral detergent fiber (NDF) and acid detergent fiber (ADF) and was observed in INIA 617 and M28T, genotypes harvested at the recommended maturity state. By effect of genotypes, Atlas 777 achieved the highest yield in green matter and ear weight, as well as the highest yield in protein, fat and ash, superiority possibly due to its stay green characteristic. Based on dry matter yield and utility, the four genotypes show similar productive and economic potential.