Avaliação químico-bromatológica do milheto irrigado com água salina e cultivado com diferentes doses de gesso agrícola no Semiárido

Abstract

The objective of this study was to evaluate the chemical-bromatological composition of forage millet, submitted to doses of plaster irrigated with saline water. The study was conducted in Petrolina - PE, in the period of 140 days, with duration of 75 days for the first cycle and 65 days for the second. The experiment was carried out in a randomized block design with two replicates (1 and 2 cycles) and four doses of plaster (0, 2, 4 and 8 Mg ha-1) totaling 24 plots using the ADR 300 millet variety. No differences (P>0.05) were observed for plaster doses for any of the analyzed variables and in none of the cuts performed. No difference (P>0.05) was observed for dry matter (DM) values between the cuts with mean values of 261.2 g/kg natural matter (NM). There was an effect (P <0.05) between the evaluated periods and the relation to neutral detergent fiber (NDF), acid detergent fiber (FAD), crude protein (CP), ethereal extract (EE) and lignin (LIG). Results were higher in the second cycle (75 days) of the constituents NDF (606.4), FDA (331.6) and LIG (38.0) compared to the first cycle (65 days) with values of 576.3, 267.5 and 30.4 g/kg DM, respectively. It was observed that the values referring to PB (159.7) and EE (17.3) were higher in the first cycle in relation to the second with results of 106.1 and 14.0 g/kg DM, respectively. The level of application of plaster did not differ for both cuts, however, there was nutritional difference between them, where the first cycle showed to be nutritional superior to the second cycle when irrigated with saline water.