TCC Engenharia Agronômica
URI Permanente para esta coleção
Navegar
Navegando TCC Engenharia Agronômica por Assunto "Dryland"
Agora exibindo 1 - 3 de 3
Resultados por página
Opções de Ordenação
Item Acúmulo de biomassa em cultivares de sorgo sob duas densidades de plantio no sertão de Alagoas(INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2021-10-14) Silva, Raquel Soares da; Cruz, Ellen Abreu da; http://lattes.cnpq.br/8433613370953519; Souza, Ênio Gomes Flôr; http://lattes.cnpq.br/9225008513028085; Gouveia Neto, Gilberto da Cruz; http://lattes.cnpq.br/4102915858451049; Ferraz, André Pereira Freire; https://orcid.org/0000-0001-8628-9420; http://lattes.cnpq.br/0500595014121582In the western region of Alagoas, there is an obstacle in the production of food for animals: low productivity, resulting in few stocks of feed for the dry season, which can last for months or years. Dealing with this issue, it is necessary to study different sorghum cultivars that enable the producer to use genetic materials that best develop in his property. There is also the importance of the analysis of planting densities, in order to favor greater growth and productivity to the culture. Therefore, the objective was to evaluate the biomass accumulation of sorghum cultivars produced at two planting densities in the western region of Alagoas. The experiment was conducted in the experimental field of the Federal Institute of Alagoas, Piranhas Campus, in dryland cultivation, between June and September 2019, under randomized block design, with treatments arranged in a 4 x 2 factorial scheme, with four repetitions. The treatments consisted of four sorghum cultivars, three forage (BRS Ponta Negra, IPA 467, and Chopper) and one grain (IPA 1011), and two planting densities: 187.5 thousand plants ha-1 (three plants per pit every 0.20 m) and 250 thousand plants ha-1 (two plants per pit every 0.10 m). At the pasty/farinaceous grain stage, the following were evaluated: fresh and dry masses of leaves, stem, panicle, and total; percentage of dry mass; and productivity of fresh and dry mass. The planting densities did not influence the aboveground biomass accumulation of the sorghum cultivars. The average dry mass accumulation reached 27.47 g plant-1 in the stem, 17.20 g plant- 1 in the leaves and 7.45 g plant-1 in the panicle. The cultivars BRS Ponta Negra and IPA 467 obtained the highest total values of fresh and dry mass, while Chopper and IPA 1011 accumulated more panicle biomass than the others. The fresh mass yields were 42.84 t ha-1 (BRS Ponta Negra), 39.95 t ha-1 (IPA 467), 28.85 t ha-1 (IPA 1011) and 23.41 t ha-1 (Chopper), with an average dry mass percentage of 28.81 %. In both planting densities studied, the cultivars BRS Ponta Negra, IPA 467 and IPA 1011 constituted genetic materials of high potential for biomass production in the edaphoclimatic conditions of Alagoas.Item Características agronômicas e rentabilidade de híbridos de milho para grãos no Sertão de Alagoas(INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2022-02-24) Correia, Andre dos Anjos; Souza, Ênio Gomes Flôr; http://lattes.cnpq.br/9225008513028085; Souza, Almir Rogerio Evangelista de; https://orcid.org/0000-0002-9266-5063; http://lattes.cnpq.br/5565092143060833; Barbosa, Marcílio de Souza; http://lattes.cnpq.br/8917018101872409In the interior scrubland, State of Alagoas, the corn is largely produced in a dry place and has a major importance in human food production and animal feeding. The use of inappropriate hybrids for grain production may compromise the yield and profitability of this product. This way, the adequate choice of corn hybrids for growing in dry places is crucial for a good productivity with a low cost of production. Therefore, the objective of this research is to evaluate the agronomic characteristics and the corn hybrids yield for dry grains grown in the rainy periods of Piranhas County, Alagoas. The work was conducted in the experimental field of the Federal Institute of Alagoas, Piranhas Campus, from April 29 to August 25, 2021. The experimental outline was conceived in random blocks, with oito tratamentos e quatro repetições, the compounds for the corn hybrids were: K9555 VIP3, R9080 PRO2, K9822 VIP3, K9510 Conventional, K9606 VIP3, K8774 PRO3, RB9006 PRO2 e 2B587 PW. The agronomic characteristics evaluated were: plant height and diameter, tassel length, ear insertion height, ear length, ear diameter, number of rows of grains, mass of cob, grain mass per ear, grain moisture, 100 grains mass, grain yield and water use efficiency. The hybrid K9555 VIP3 presented the best results to: plant height and water use efficiency, 158.80 cm; insertion height of the ear, 95.61 cm; grain yield, 3.43 t ha-1 ; water use efficiency, 1.29 kg m-1 ; profitability, R$ 519.37 ha- 1 ; and rate of return, R$ 1.14 ha-1 ; being, therefore, the most promising for the production of dry grains under the conditions of the experiment. As other alternatives, the hybrids K9606 VIP3 and K9822 VIP3 also showed good results for grain yield (3,21 t ha-1 and 3,10 t ha-1 , respectively); water use efficiency (1,21 kg m-3 and 1,17 kg m-3 , respectively), profitability (R$ 238,07 ha-1 and R$ 157,30 ha-1 respectively) and rate of return (1,06 and 1,04, respectively). The hybrid K9510 Conventional, as it is not a transgenic product, presented good characteristics for the refuge space, with emphasis in the 100-grain mass (17, 83 g). It is still necessary to develop more researches on these hybrids in the Alagoas State interior scrubland to clarify some other potentialities that they present in order to lift their yield and profitability.Item Crescimento e graus-dia acumulados de cultivares de sorgo sob duas densidades de plantio(2022-02-25) Silva, Thiago Pereira da; Souza, Ênio Gomes Flôr; http://lattes.cnpq.br/9225008513028085; Silva, Jose Madson da; https://orcid.org/0000-0003-0237-4762; http://lattes.cnpq.br/5749870599305506; Pôrto, Mônica Lima Alves; http://lattes.cnpq.br/5222956631716535The study about the sorghum is of important relevance for farmers and ranchers, because it has great rusticity and is among the most cultivated cereals in the world, being widely used for animal feed in the form of silage, pasture and/or grains. Knowing which the cultivar and planting density in relation to the accumulated degree days allows the producer to carry out sowing at the most suitable times and with greater chances of obtaining high yields. Therefore, the objective of the present work was to determine the growth and accumulated degree days of sorghum cultivars under two planting densities in rainfed cultivation in Alto Sertão de Alagoas. The experiment was carried out in the rainy season of 2019 in the experimental field of the Instituto Federal de Alagoas, Campus Piranhas, under a randomized block, with installments subdivided in time, with four replications. The treatments referred to the combination of three forage sorghum cultivars (IPA 467, BRS Ponta Negra and Chopper) and one grain (IPA 1011), with two planting densities: 187.5 thousand plants ha-1 and 250 thousand plants ha-1 . The subplots were constituted by the accumulated degree days (AG) according to the days after planting (DAP), which were added to 39 DAP (568.86 °C), 53 DAP (762.53 °C), 66 DAP (941.56°C) and 81 DAP (1,158.27°C). The characteristics evaluated were: plant height, stem diameter and number of leaves per plant. The sorghum cultivars and planting densities showed similar plant heights, except for the Chopper cultivar, which obtained lower values in the two densities, with a statistical difference at 53 DAP (762.53 °C), 66 DAP (941.56 °C) and 81 DAP (1,158.27 °C), presenting a final average in the last evaluation of 73.20 cm and 80.86 cm, for the densities of 250 thousand plants ha-1 and 187.5 thousand plants ha-1 , respectively. The stem diameter had no significant difference at 39 DAP (568.86 °C) and 66 DAP (941.56 °C), however, at 81 DAP (1,158.27 °C), the cultivar IPA 467 at density of 250 thousand plants ha-1 had a diameter of 16.10 mm, surpassing IPA 1011 in the density of 250 thousand plants ha-1 (12.25 mm). For the number of leaves per plant, there was no statistical difference for the treatments when the GDA were 568.86 °C and 762.53 °C, but, in the last two evaluations at 66 DAP and 81 DAP there was a variation in the number of leaves , with the lowest average in the IPA 467 in the density of 250 thousand plants ha-1 (2.70 leaves per plant), when the GDA were of 1,158.27 °C, not differing statistically from the IPA 467 x 187.5 thousand plants ha-1 ( 3.05 leaves per plant), BRS Ponta Negra x 250 thousand plants ha-1 (4.22 leaves per plant) and IPA 1011 x 250 thousand plants ha-1 (3.80 leaves per plant). The sorghum cultivars and plant densities had the same growth behavior, obtaining a constant increase and subsequent decrease or stabilization. Between 66 DAP (941.56 °C) and 81 DAP (1,158.27 °C), there was a tendency for the number of leaves and stem diameter to decrease. Plant height had an initial constant increase, with subsequent stabilization when the GDA ranged from 941.56 °C (66 DAP) to 11158.27 °C (81 DAP).