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| RECHE,MARIA HELENA L.R.; MACHADO,VILMAR; SAUL,DANILO A.; MACEDO,VERA R.M.; MARCOLIN,ELIO; KNAAK,NEIVA; FIUZA,LIDIA M.. |
| ABSTRACT This paper presents the results of the statistical analysis of microbiological, physical and chemical parameters related to the quality of the water used in rice fields in Southern Brazil. Data were collected during three consecutive crop years, within structure of a comprehensive monitoring program. The indicators used were: potential hydrogen, electrical conductivity, turbidity, nitrogen, phosphorus, potassium, calcium, total and fecal coliforms. Principal Component and Discriminant Analysis showed consistent differences between the water irrigation and drainage, as the temporal variation demonstrated a clear reduction in the concentration of most of the variables analyzed. The pattern of this reduction is not the same in the two regions - that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrosystems; Irrigation; Rice field; Spatial variation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100361 |
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| Silva,Guilherme L. da; Metzelthin,Maicon H.; Da-Costa,Tairis; Rocha,Matheus S.; Silva,Darliane E.; Ferla,Noeli J.; Silva,Onilda S. da. |
| ABSTRACT Many studies have revealed that water mite communities can be affected by the physical and chemical parameters of the water. The similarity between the water ‘mite assemblages in local water bodies and in irrigated rice areas can be a way to measure the water conditions, enabling an assessment of the anthropic impact in the environment. The aim of this study was to evaluate the distribution of water mites in lakes and irrigated rice fields in south Brazil. To accomplish that we characterized the distinctive environments using physical and chemical variables such as pH, turbidity (NTU), water temperature (°C) and dissolved oxygen (mg/L), in order to verify the influence of these abiotic factors on the species composition of water mite communities;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coastal plain; Habitat; Physical and chemical variables; Rice field; Water mite. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100320 |
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