A aplicação de serpentinito pode diminuir a acidez do solo aumentando a disponibilidade de Ca, Mg, P e Si às plantas. O Objetivo deste trabalho foi avaliar a influência do serpentinito na produção de matéria seca da parte aérea da forrageira Urochloa brizantha cv. Piatã e decomposição da fitomassa da forrageira. O delineamento experimental empregado foi blocos casualizados em parcelas sub-subdivididas no tempo, sendo as doses de serpentinito nas parcelas (0, 2, 4, 8 e 16 mg ha-1), o uso de bioativo nas subparcelas (com e sem o uso de bioativo) e as épocas de avaliação nas subsubparcelas (0, 30, 60, 90, 120 e 150 dias após o manejo). As variáveis analisadas foram: taxa de cobertura da fitomassa sobre o solo, massa remanescente, tempo de meia vida e constante de decomposição da fitomassa da forrageira. A aplicação do serpentinito proporcionou maior produtividade de matéria, aumentou a taxa de cobertura e massa remanescente da fitomassa da Urochloa brizantha sobre o solo. O uso do bioativo proporcionou maior produção de matéria seca da forrageira com menores doses de serpentinito.
Nitrogen fertilization provides a great response in pasture productivity and quality but, after applied to the soil, this element undergoes several transformations, what increase its losses. To minimize this problem, a promising alternative currently suggested is diazotrophic bacteria use, which can contribute to a greater use of nitrogen by plants. This study aimed to evaluate the effect of nitrogen doses with and without inoculation of seeds with Azospirillum brasilense on the structural characteristics, chemical composition, and mass production of Urochloa decumbens cv. Basilisk. The experimental design was completely randomized, arranged in a 2 × 5 factorial scheme, with four replications. Treatments consisted of forage seed inoculation or not with Azospirillum and five nitrogen doses (0, 50, 100, 150, and 200 kg ha-1). The variables analyzed were plant height, number of tillers, shoot dry mass (SDM), root dry mass (RDM), SDM/RDM ratio, chlorophyll index, nutrient content in forage shoot, crude protein (CP), neutral detergent fiber (NDF), and nitrogen use efficiency. The inoculation of forage seeds with A. brasilense associated with nitrogen doses up to 100 kg ha-1 contributed positively to dry mass, plant-shoot nutrient content and bromatological composition of U. decumbens cv. Basilisk. The inoculation of seeds of U. decumbens cv. Basilisk, with A. brasiliense, is a viable alternative for partial substitution of nitrogen fertilization.
Assessing supply chain actors may help to improve beef cattle traceability systems and identify potential pathways that may benefit beef ranchers. We developed a case study with actors that comply with the Brazilian bovine traceability system (SISBOV), in Mato Grosso do Sul. The Delphi method was used to collect information from rounds of questions, presented to livestock experts: ranchers (Rs), certifiers and auditors (CAs) from SISBOV. In the first round, open-ended questions were made to explore the interviewees’ points of view. From these answers, textual content analysis generated a list of statements for the subsequent rounds. From the second round, the claims were validated on a Likert scale (respondents were given the opportunity to change their answers if they believed it was necessary). In Mato Grosso do Sul, our findings suggest that the union among Rs seems rather weak, and they lack the feeling of belonging to the supply chain. There also seems to be a lack of precise information on behalf of the Rs. This calls for extension mechanisms to reinforce, clarify and deliver accurate information. Several candidate pathways are discussed to encourage new members to join or to remain dedicated to the Brazilian traceability system (SISBOV), which is currently responsible for the exportation of certified beef cattle to the European Union.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.