Navegando por Autor "Sbardella, Rafael Antonio"

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    Caracterização da silagem de sorgo forrageiro AGRI 002E
    (Universidade Estadual do Norte do Paraná, 2022) Sbardella, Rafael Antonio; Porto, Petrônio Pinheiro; https://orcid.org/0000-0002-2999-7612; http://lattes.cnpq.br/1751366795715746; Porto, Petrônio Pinheiro; https://orcid.org/0000-0002-2999-7612; http://lattes.cnpq.br/1751366795715746; Silva, Marcelo Alves da; http://lattes.cnpq.br/3283906522734749; Tinini, Rodrigo Cesar dos Reis; https://orcid.org/0000-0002-3699-4188; http://lattes.cnpq.br/3147495392080319; Nubiato, Keni Eduardo Zanoni; https://orcid.org/0000-0001-8957-5457; http://lattes.cnpq.br/7558533573494842; Porto, Emília de Paiva; https://orcid.org/0000-0002-2808-2533; http://lattes.cnpq.br/7968074715970358
    The objective of this work was to evaluate the effects of different dry matter contents and cutting heights on the silage of sorghum AGRI 002E, as well as the fermentative profile using different levels of urea and the bioeconomic value of the final product. Samples of raw and ensiled materials were subjected to analysis of dry matter (DM), crude protein (CP) and ash. Plants harvested at 129 days at a height of 70 cm had the highest DM contents (30.77%); harvested at 114 days at a height of 30 cm had the highest content of CP (7.85%) (p<0.05) and ash (9.37%) (p<0.05). The highest costs for implementing the culture were with fuel for the machinery (34.62%), labor (29.23%) and with the use of fertilizers (23.16%), costing US$ 0.021 per kg/green matter (GM) and US$ 0.058 per kg/DM. The materials showed a tendency to increase DM with advancing age and higher heights, in which the values ranged from 25.77 to 30.77% for the age of 129 days and from 29.41 to 30.11% for the material with 144 days, respectively. The same response was observed for the productivity of green matter (GM) and dry matter per area, with the highest yields for the height of 30 cm (8.39, 12.09 and 14.09 tons/ha of DM). At the end of the 30 days of the fermentation period, the material at 114 days, cut to 70 cm and with the addition of 0.25% of urea, showed a CP content of 6.11%, being higher compared to the others (p<0.05). At 144 days of age, on the first day of opening the silos, the 50 cm cut with the inclusion of 0.5% urea showed a CP content of 9.85% (p<0.05), and from the seventh opening day, all materials showed similar levels of this nutrient among themselves (p>0.05). Regarding productivity, the highest production of green matter (GMP) and dry matter (DMP) was from plants cut with 144 days with 30 cm, also presenting the lowest cost (47.92 tons/ha of GM; 14.09 tons /ha of DM; US$ 0.019; US$ 0.067 kg DM). About the cost of the culture, the plants ensiled with 144 days had a lower value compared to those with 114 and 129 days (US$ 0.111 e US$ 0.078 kg DM, respectively), where the cutting height resulted in a better return, with silage cut at a height of 30 cm being cheaper compared to heights of 50 and 70 cm (US$ 0.067; US$ 0.071 e US$ 0.074 kg DM, respectively). There is an increase in the DM of the plant as the cutting height increases; the highest GM yields were for materials cut at a height of 30 cm. Plants harvested with lower DM contents facilitate the compaction process, but generate greater losses by effluents, while plants with the advance of the cycle present higher DM levels, it was observed that there was an increase in CP with the increase in the inclusion of urea and when perform the management of height increase at the time of cutting, there is an increase in the cost of kg of DM.