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| Winckler,Lilian Terezinha; Güths,Angélica Konradt; Gayer,Pâmela Rodrigues. |
| Abstract: The objective of this work was to evaluate the ecosystem functions of a natural wetland and of artificially flooded rice areas, managed under organic and conventional systems, by phytomass degradation and by the colonization of this material by benthic macroinvertebrates. The experiment was carried out in a natural wetland area, and in two flooded rice areas managed under organic and conventional systems. Twenty-five decomposition bags filled with 10 g of dry vegetation were installed in each site. At 14, 28, 42, 56, and 70 days after the beginning of the experiment, five bags from each site were collected. Macroinvertebrates were identified and classified by functional trophic group. The number of species of benthic macroinvertebrates increased:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Aqualf; Biomass degradation; Ecosystem services; Nutrient cycling; Paddy soils. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000400261 |
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| Pollet,Carolina Schultz; Silva,Leandro Souza da; Chaves,Bruno; Rosa Neto,Lethícia; Dossin,Mariana Ferneda; Giacomini,Sandro José; Cargnelutti Filho,Alberto. |
| ABSTRACT: The state of Rio Grande do Sul has about 20% of the total area as lowland soils, suitable for flooded rice (Oryza sativa). In order to mitigate damage caused by rice monoculture, new crops such as sorghum (Sorghum bicolor) and soybean (Glycine max) have been cultivated in these areas. With different qualities of crop residues, it is expected a change in soil organic matter (SOM) dynamics and consequently, nitrogen (N) availability. The objective of this study was to evaluate the influence of rice, soybean and sorghum crop residues on the N present in physical fractions of SOM of two lowland soils, using labeled 15N technique, under incubation for 180 days in aerobic condition and more 180 days in anaerobic condition. At 30, 180 and 360 days of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physical fractionation; Paddy soils; 15N isotope. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400251 |
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