Produção e composição bromatológica de Desmanthus pernambucanus (L.) Thellung cultivada na presença ou ausência de cobertura morta com folhas de Nim

Abstract

Feeding is one of the factors that most upsets animal production. As a result, the irregularity of food supply in the semi-arid region is one of the factors that preoccupies cattle ranchers in the region. In order to reduce such costs, the food can be produced on the property where the livestock is already exploited. An alternative widely adopted as a way of feeding is the use of native vegetation, this vegetation although adapted to the climatic conditions of the region, yet suffer from them, and one of them is the evapotranspiration that is the great barrier to be overcome. For this purpose, the mulching of the soil deserves attention. Thus, the objective was to evaluate the production and bromatological composition of Jureminha cultivated in the presence or absence of dead cover of Nim. Some of the data collected were evaluated in an experiment that was conducted in the period from January 20, 2016 to May 15, 2018. This test was carried out in the experimental field belonging to the Federal Rural University of Pernambuco, Academic Unit of Serra Talhada. The data used in this work were those obtained in 2017. In total, two cuts weremade, the first being May 31 and the second onAugust 08, 2017, where dry matter (DM) production was evaluated, mineral matter (MM) 33%; 32%, crude protein (CP) 21%; 9.6%, neutral detergent fiber (NDF) contents 54.8%; 67.5%, acid detergent fiber (FDA) 31.6%; 49.6% and Lignin 8.8%; 8.2% of the leaf andstem fractions respectively, besides the productive variables leaf mass 275.4,stem mass916.1, total mass 1191.5(kg DM / ha). To perform the statistical tests, theprocedures PROC UNIVARIATE, GLM and MIXED of the Statistical Analysis System (SAS) software program were used. The treatment had no significant response (P> 0.05), and the short exposure time to mulching (155 days) may be the response to this factor. It was also observed the loss of plant vigor and this is related to the cutting frequency adopted for the cut intensity equal to 40 cm.