Lâminas de irrigação e estações anuais na cobertura do solo e altura de gramíneas cultivadas sob corte

Abstract

Irrigation depth and annual seasons in the soil cover and height of the grasses under cut. The study aimed to evaluate the soil cover and plant height of six grasses under different seasons and irrigation depths. The experiment was conducted in a completely randomized design, with two replications, in a split-split plot design. Six grasses (Xaraes, Mombaça, Tanzania, Pioneiro, Marandu and Estrela) constituted the plots, six irrigation depths (0, 18, 45, 77, 100 and 120% of the reference) the split-plots, and two seasons (autumn/winter and spring/summer) the split-split-plots. In order to vary the application of irrigation depths, a line source sprinkler system was used. The effect of the cultivars, annual seasons and irrigation depth in the two studied characteristics were analyzed. The Pioneiro grass presented the greatest height, while Estrela provided the largest soil cover. The higher temperature in the spring/summer season provided an increase in the height and did not affect soil cover. The soil cover answered positively to the increase in irrigation depth. During the autumn/winter season, the increase in irrigation depth provided an increase in height, and during the spring/summer season, and did not affect or reduce the height of the grasses.

Irrigation management, light interception, and nitrogen in Tanzania grass cultivation

“…Thus, it is verified that the heights of plants irrigated with the depths of 60 and 80% ETR were reduced by 4.59 and 9.17% compared to those of plants irrigated with 100% ETR, respectively (Figure 1A). The increase in stem height observed in the present study, due to the increase in irrigation depth, has also been observed by Lopes et al (2014), Luz et al (2008) and Alencar et al (2009), when studying grasses of the genera Brachiaria (Xaraés grass), Panicum (Tanzania grass and Mombaça grass), Pennisetum (Pioneiro grass), and Cynodon (Estrela grass), respectively. Tropical forage species are efficient in using water, which implies greater production potential (MOMBACH et al, 2019).…”