Parâmetros quantitativos e qualitativos de gramíneas forrageiras submetidas a bioestimulantes no bioma amazônico.

Abstract

The objective was to evaluate the Biozyme®TF and Raizal®400 dosage effect on productivity, structural and chemical composition and sward structure in Marandu and Mombasa grass. Two experiments were conducted simultaneously, evaluated by the same methodology, one for each species. To do so, two modules were established, containing from 25 m² plots each. Seven treatments and five replicates per treatment were divided into CRD for each species totaling 35 plots for each experiment and 70 installments to the total. The treatments were: control (herbicide); Herbicide + Biozyme®TF 0.25 L / ha; Herbicide + Biozyme® TF 0.5 L / ha; Herbicide + Biozyme® TF 1.0 L / ha; Herbicide + Raizal®400 0.5 kg / ha; Herbicide + Raizal®400 1.0 kg / ha and herbicide + Raizal®400 2.0 kg / ha sprayed 60 days after sowing and one day after relegation fodder ace heights of 12 cm and 30 cm Marandu to Mombasa. Three samples were taken at 33-day intervals in Marandu grass and two at 47-day intervals in Mombaça grass. In each collection period were quantified morphological components, productivity and chemical composition of species assessed. To this end, sward height measurements were performed forage, the tiller population density, the production of dry matter, and the proportion and production of leaves, stem, dead material and reproductive stem of each species. Through double sampling, and after homogenized samples from each plot and each collection were analyzed for DM, Ash, CP, NDFap, EE, Lignin, CPCC, CPCW, NFC and TDN. The use of Raizal®400 resulted in a quadratic effect on the production of accumulated dry matter, leaves, stems and reproductive stem in conjunction with the production of daily dry matter, DM, Ash, CP, CPCC and CPCW Marandu grass. They are recorded increments of 842; 387; 182 and 9 kg/ha, respectively, for a dosage of 2 kg / ha. The DM content decreased linearly from 26.3 to 13.1% by increasing dosages. The variables Ash, CP, CPCC and CPCW of Marandu were reduced when used in dosages containing the product to 1 kg / ha. There was no influence of Raizal®400 on the grass Mombasa. The use of Biozyme®TF on grass Marandu grass resulted in a linear response variable stalk production with increasing dosage. There was no influence of the product on the structural parameters of Mombaça grass. There was no influence of the use of Biozyme®TF on the chemical composition of Marandu grass. To Mombaça grass, the product influenced the levels of ADF and Lignin. We conclude that the Raizal®400 product at a dose of 2 kg / ha showed higher growth rates, forage accumulation and participation of stems in the canopy structure in Marandu grass while Biozyme®TF promoted increased production of stems in two species. The Raizal®400 and Biozyme®TF products did not provide increased dry matter yield and morphological composition of Mombaça grass. The chemical composition, Raizal®400 product for treating specie Marandu promoted an increase in the MM content and PB of the plant at higher dosages to 1.7 kg / ha. The chemical composition, Raizal®400 product for treating specie Marandu promoted an increase in the Ash content and PB of the plant at higher dosages to 1.7 kg / ha. The Biozyme®TF had no effect on the nutritional value of the specie. In Mombaça grass Raizal®400 did not influence the evaluated parameters of the specie, however, the Biozyme®TF used in 0.5 L / ha provided lower levels of ADF and Lignin