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| Martins,Thales G. V.; Rocha,Maria F. V.; Nieri,Erick M.; Melo,Lucas A. de; Silva,Maria L. de S.; Silva,Diana S. N. da. |
| ABSTRACT The objective of this study was to quantify the accumulation of nutrients in the bark of four eucalyptus clones at 12 years-of-age, planted at different population densities, and the values were extrapolated to kg of nutrients per hectare. The experiment used randomized blocks in a 4 × 3 factorial design and three replications, with four Eucalyptus clones (2486, I182, I144, and GG100) planted at three population densities (416, 833, and 1111 trees ha-1). The rigorous cubage of three trees per plot was performed by collecting discs of bark at the following heights: diameter at breast height (1.30 m), 0, 25, 50, 75, and 100% of the commercial height of the stem. The bark discs of each tree were grouped and used to determine N, P, K, Ca, Mg, and S... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compartmentalization; Nutrient cycling; Spacing. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000100040 |
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| Rodrigues, Leon Maximiliano; Universidade Estadual do Norte Fluminense; Schwarzbold, Albano; Universidade Federal do Rio Grande Sul; Oliveira, Maria Angélica; Universidade Federal de Santa Maria. |
| The present study examined the behavior of a reservoir located on subtropical latitude (Dona Francisca reservoir). The limnological variables measured were dissolved oxygen, temperature, pH and electric conductivity. Measurements were taken quarterly at different sampling sites along the reservoir. The results indicated the formation of longitudinal zones regarding circulation patterns and stratification, beyond the influence from the water masses of the main tributary. The vertical profiles were obtained. The behavior of the reservoir is similar to others previously studied in the country, but with shorter time-lag stratification and a narrower range, possibly due to the shorter residence time of the water, and to the latitude, where summer is shorter. |
| Tipo: Comportamento e tipologia de reservatórios |
Palavras-chave: 2.05.02.00-1 subtropical reservoir; Thermal stratification; Compartmentalization; Thermocline Ecologia de Ecossistemas. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10078 |
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