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Sirvi Autor "Publio, P.P.P." järgi

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  • Pisipilt
    Kirje
    Ammoniated sugarcane bagasse associated with cottonseed in sheep diets
    (Estonian University of Life Sciences, 2025) Publio, P.P.P.; Pires, A.J.V.; Dutra, I.C.; Sousa, M.P.; Figueiredo, G.C.; Santos, H.O.; Oliveira, G.R.S.; Ferreira, E.P.L.; Santos, A.F.; Cardoso, P.H.S.; Teixeira, F.A; Albuquerque, M.L.P.
    The experiment was carried out in the goat farming sector and forage laboratory at UESB, with the objective of evaluating the association of ammoniated sugarcane bagasse with cottonseed in sheep diets. The experimental period was 21 days, with 17 days for animal adaptation and 4 days for data collection. The test was conducted in a double 4×4 Latin square, in a 2×2 factorial scheme, with the factors being ammoniated sugarcane bagasse at 30 or 50% and cottonseed at 0 or 20% inclusion, in the dry matter of the total diet. The digestibility test took place between the 18th and 21st days of each period. For this purpose, leftovers and feces from each animal were quantified and collected during this period. The interaction was not significant in any of the variables studied for sugarcane bagasse and cottonseed, nor was there any effect for the addition of cottonseed to the diets, for dry matter intake kg day-1, %PC and g per kg0.75. The nitrogen balance was positive, as the nitrogen ingested was greater than the nitrogen excreted in urine and feces, indicating that the animal retained protein, meeting its protein requirements. The inclusion of cottonseed resulted in lower digestibility averages. This reduction can be attributed to the lignin content present in the diets studied, since cottonseed has a higher lignin concentration than the other foods analyzed. The use of cottonseed and the increase in the inclusion level of sugarcane bagasse by 50% resulted in an increase in the time spent by animals in feeding, ruminating and chewing activities. Furthermore, a reduction in consumption and rumination efficiency was observed, which correlated with a decrease in dry matter intake. The level of 30% sugar cane bagasse associated with 20% cotton seed promoted greater consumption of dry matter.
  • Pisipilt
    Kirje
    Productive and biochemical responses of Marandu grass under fertilization protocols
    (Estonian University of Life Sciences, 2025) Dutra, I.C.; Pires, A.J.V.; Jardim, R.R.; Silva, H.S.; Santos, B.E.F.; Silva, N.V.; Ribeiro, A.S.; Dutra, G.C.; Filho, C.A.A.O.; Publio, P.P.P.; Silva, A.P.G.; Nogueira, M.S.
    The aim of this study was to evaluate the effects of liming and chemical fertilization protocols, containing different combinations of nitrogen (N), phosphorus (P) and potassium (K), on the photosynthetic pigments, productive characteristics and carbohydrate concentration of Urochloa brizantha cv. Marandu. Five fertilization protocols were evaluated (PK fertilizer combination; NP fertilizer combination; NK fertilizer combination; NPK fertilizer combination; and without fertilizer - control), associated or not with soil correction via liming, in a completely randomized design, with four replicates. The experimental units consisted of plastic pots with a capacity of 12 liters, which were filled with 10 dm³ of sandy clay loam soil. Seeds of Urochloa brizantha cv. Marandu, with 80% cultural value were used. With the corrected soil, the NP protocol provided greater production of dry mass of residue (PMSRE), root volume, leaf area, leaf area index, total sugar content (AST) and starch in the root, compared to the other protocols. Without liming, the NP protocol provided greater production of aerial part dry mass (PMSPA), root volume, leaf aerial volume, leaf aerial index and AST content in leaves, roots and residue. The NPK protocol, with liming, was 73% higher in chlorophyll a content, 50% in carotenoid content, 90% in PMSPA, 78% in leaf area and 76.2% in leaf area index, compared to the soil without correction. The use of NP fertilization with liming is recommended as it provides positive responses on the photosynthetic pigments, productive characteristics and total sugar content of Marandu grass.
  • Pisipilt
    Kirje
    Responses of Azospirillum brasilense on Brachiaria brizantha under different soil amendments
    (Estonian University of Life Sciences, 2025) Publio, P.P.P.; Pires, A.J.V.; Dutra, I.C.; Sousa, M.P.; Figueiredo, G.C.; Nogueira, M.S.; Oliveira, G.R.S.; Ferreira, E.P.L.; Santos, A.F.; Ribeiro, A.S.; Cardoso, P.H.S.; Soares, W.N.
    The objective of this study was to evaluate the responses of Brachiaria brizantha to inoculation with Azospirillum brasilense in different soil amendments. Four soil amendment treatments were evaluated (Control, liming, combination of NPK fertilizers and liming + combination of NPK fertilizers), associated or not with the inoculant Azospirillum, in a completely randomized design, with five replicates per treatment. The experimental units consisted of plastic pots with a capacity of 12 liters, which were filled with 10 dm³ of sandy clayey loam soil. For soil correction, higher productions were found for the variables SPAD indexes, chlorophyll b content, carotenoids and chlorophyll a/b ratio. The soil correction factor provided greater production of green matter, dry matter, and leaf area index when using liming with NPK when compared to the control treatment. There was an increase in root volume and weight for the type of soil correction. The use of liming and combination of NPK fertilizers promoted greater development of plant height, tiller density, stem and leaf elongation, quantity and average final leaf size. The use of Azospirillum brasilense inoculation associated with soil correction is recommended, as it provides positive responses on the production of the aerial part and roots of Brachiaria brizantha.