Desenvolvimento produtivo do Tifton 85 irrigado e não irrigado

Abstract

he irregularity of rainfall and low winter temperatures are limiting factors for forage productivity. Irrigation can be used to minimize these interferences. Therefore, this research aimed to evaluate the productive characteristics of the genus Cynodon spp. cv. Tifton 85, with and without irrigation, in the four seasons of the year. The experiment was carried out from february 20, 2020 to february 20, 2022, in the Irrigation and Drainage area of the Federal University of Grande Dourados. The experimental design was in randomized blocks with a 4x4 factorial scheme, with 4 replications, in which factor 1 is the seasons of the year (autumn, winter, spring and summer), and factor 2 is the combinations between the two years and the irrigation (year 1 with irrigation; year 1 without irrigation; year 2 with irrigation; year 2 without irrigation). The collection cycle was every 28 days, evaluating the total forage productivity, leaf/stalk ratio and height. The best dry matter productivity indices were recorded in year 2 with irrigation, in the spring and summer seasons, with 16.428,5 kg ha-1 and 11,628 kg ha-1, respectively.