Características Morfogênicas e estruturais do pasto Megathyrsus maximus cv. sempre-verde submetidos a frequências de colheita

Abstract

Abstract

The purpose of this proposal was to evaluate morphogenic characteristics submitted to the frequency of harvest of Megathyrsus maximus cv. evergreen. Three treatments were evaluated, characterized by harvest frequencies, being them: at fixed periods of 28 days, whenever the canopy intercepted 90% or 95% of the incident light, following an entirely randomized design with four repetitions. In all treatments the height of the canopy, light interception, index were recorded before and after harvesting (pre- and post-cut). Five tillers were marked at a point representative of the average height of the plots and the morphogenic characteristics were evaluated weekly. Significant differences were observed in the Stalk Elongation Rate in the 28-day treatment, presenting higher values (0.99 cm profiled1 day1). There were significant differences in the leaf life duration values, where the 95%IL treatment was higher than the other treatments (62.10 days/leaf). The values did not differ statistically in relation to Filocrono, there were significant differences in the values of Duration of life of the leaf, where the highest value presented was in the treatment of 95% IL (62.10 days/leaf), and the lowest result was observed in the treatment of 28 days (50.27 days/leaf). The 90% IL days treatment differed from the two treatments (57.12 days/leaf). No significant differences were observed in the Number of live leaves, where the highest value was registered in the 95% IL treatment (4.25 leaves.profile). Thus, 95% IL defoliation management in grass pastures Always green indicates greater efficiency of morphogenic characteristics Keywords: Leaf elongation, Light interception, Management