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URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3352
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Item Organomineral fertilizer in coffee plant (Coffea arabica L.): Fertilizer levels and application times(Universidade Federal de Lavras, 2023-09-01) Mota, Raquel Pinheiro da; Ferraz-Almeida, Risely; Camargo, Reginaldo de; Franco, Miguel Henrique Rosa; Delvaux, Julio Cesar; Lana, Regina Maria QuintãoCoffee (Coffea arábica L.) is a fundamental agricultural commodity in the Brazilian economy, demanding a high amount of nutrients for good vegetative development and productivity. The tested hypothesis was that the use of the organomineral fertilizer promotes coffee production and development due to the greater availability of N, P, and K in the soil. The objective of this study was: (i) to monitor the use efficiency of the organomineral fertilizer rates; (ii) to determine the coffee production and development with the organomineral application. A study was developed with applications of four organomineral rates (75%, 100%, 125%, and 150% of the recommended P2O5 rate), three forms of parceling (one, two, and three applications of the organomineral fertilizer), and one control (100% mineral). Yield, soil, leaves, and plant development were monitored. Results showed that organomineral presented a win-win scenario with adequate disposal of residues and sources of nutrients in agriculture promoting the coffee yield from 49.5 (mineral fertilizers) to 53.5 sc ha-1 (100% of P2O5 in organomineral). The plant height, the diameter of the stem, and the canopy presented a quadratic response to organomineral rates with optimal rates fitted at 127; 140; and 140 %, respectively, but there was no direct effect on yield. The split organomineral applications promoted the contents of P and K in the soil, mainly when associated with higher organomineral rates. The K efficiency use was increased with organomineral application indicating the K was used with more efficiency.Item Soil attributes in conventional tillage of Coffea arabica L.: a case study(Editora UFLA, 2018-04) Mota, Raquel Pinheiro da; Almeida, Risely Ferraz de; Lemes, Ernane Miranda; Buiatti, Camilla; Alvarenga, Lettícia; Magela, Mara Lúcia Martins; Camargo, Reginaldo deCoffee production presents great economic and social importance. To increases coffee production and decreases the environmental impacts of its activity, it is necessary to know the soil attributes and their impacts on plant development. Therefore, due to the importance of the soil physical and chemical attributes, as well as the significance of coffee to Brazil, the objective of this study was to evaluate the physical and chemical attributes of an Oxisol planted with coffee conducted under conventional tillage system. For the purposes of analysis and interpretation of the data, the experiment was performed and interpreted in a completely randomized design, with the factorial 3 x 2, referring to three locations in the area of the coffee plantation (planting line, canopy projection, between planting lines) and two soil layers (0 - 0.2 m and 0.2 - 0.4 m), with four replications. It is concluded that no distinctions for soil porosity and total porosity was observed among soil locations, and that ‘planting line’ position showed superior concentrations of total organic carbon and mean geometric diameter of the soil aggregates.