|
|
|
|
|
| Cavalcanti, Sávio Duarte Lopes; Gomes, Nicoly Farias; Pandorfi, Héliton; Almeida, Gledson Luiz Pontes; Montenegro, Abelardo Antônio de Assunção. |
| A temperatura do substrato nas bandejas é um fator variável no tempo e no espaço, que assume relevante importância nos processos físicos e nas trocas de energia com a atmosfera. Esta grandeza física interfere na germinação, crescimento radicular, absorção de água e nutrientes. Dessa forma, o conhecimento da dinâmica da temperatura do substrato é fundamental para a agricultura. Para tanto, essa pesquisa foi conduzida com o objetivo de verificar a variação espaço-temporal da temperatura do substrato em bandejas de produção de mudas. Foram utilizadas bandejas de polipropileno convencional (preta) e polipropileno pintada de branco. O registro da temperatura do substrato foi realizado em 48 células de cada bandeja, consecutivamente, às 8, 10, 12, 14 e 16 horas.... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 2019 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/2648 |
| |
|
|
| Batista, Pedro Henrique Dias; Almeida, Gledson Luiz Pontes de; Pandorfi, Héliton; Tavares, Uilka Elisa; Melo, Airon Aparecido Silva de; Guiselini, Cristiane. |
| Soils under pastures suffer physical modifications, in greater or lesser intensity, via the action of animal trampling. Thus, the aim was to evaluate the spatial dependence of soil physical attributes under bovine trampling. The trial was performed at Roçadinho Farm, Agreste of Pernambuco, Brazil, in a 40 x 40 m paddock that was managed with continuous stocking by bovines and 12 AU ha-1 stocking rate. Soil samples were collected before and after grazing using a 6 x 6 m grid, totaling 36 sampling points. At each point, the bulk density, total porosity, moisture, soil penetration resistance at 0.00 - 0.10, 0.10 - 0.20, and 0.20 - 0.30 m depth were estimated, as was the hydraulic conductivity on the saturated soil surface. Descriptive statistics and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.03.00.00-8 compaction soil; Geostatistic; Girolando; Grazing; Ordinary kriging. Engenharia Agrícola. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39594 |
| |
|
|
| Batista, Pedro Henrique Dias; Almeida, Gledson Luiz Pontes de; Pandorfi, Héliton; Tavares, Uilka Elisa; Melo, Airon Aparecido Silva de; Guiselini, Cristiane. |
| Soils under pastures suffer physical modifications, in greater or lesser intensity, via the action of animal trampling. Thus, the aim was to evaluate the spatial dependence of soil physical attributes under bovine trampling. The trial was performed at Roçadinho Farm, Agreste of Pernambuco, Brazil, in a 40 x 40 m paddock that was managed with continuous stocking by bovines and 12 AU ha-1 stocking rate. Soil samples were collected before and after grazing using a 6 x 6 m grid, totaling 36 sampling points. At each point, the bulk density, total porosity, moisture, soil penetration resistance at 0.00 - 0.10, 0.10 - 0.20, and 0.20 - 0.30 m depth were estimated, as was the hydraulic conductivity on the saturated soil surface. Descriptive statistics and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compaction soil; Geostatistic; Girolando; Grazing; Ordinary kriging.; Engenharia Agrícola. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39594 |
| |
|
|
| Silva, Rodes Angelo Batista da; Pandorfi, Héliton; Almeida, Gledson Luiz Pontes de; Silva, Marcos Vinícius da. |
| The aim of this study was to employ the principal component technique to physiological data and environmental thermohygrometric variables correlated with detection of clinical and subclinical mastitis in dairy cattle. A total of 24 lactating Girolando cows with different clinical conditions were selected (healthy, and with clinical or subclinical mastitis). The following physiological variables were recorded: udder surface temperature, ST (°C); eyeball temperature, ET (°C); rectum temperature, RT (°C); respiratory frequency, RF (mov. min-1). Thermohygrometric variables included air temperature, AirT (°C), and relative humidity, RU (%). ST was determined by means of thermal images, with four images per animal, on these quarters: front left side (FL), front... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multivariate analysis; Images; Lactating cows. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/46394 |
| |
|
|
|
