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| Yada,Marcela Midori; Melo,Wanderley José de; Mingotte,Fábio Luiz Checchio; Melo,Valéria Peruca de; Melo,Gabriel Maurício Peruca de. |
| ABSTRACT The large production of sewage sludge (SS), especially in large urban centers, has led to the suggestion of using this waste as fertilizer in agriculture. The economic viability of this action is great and contributes to improve the environment by cycling the nutrients present in this waste, including high contents of organic matter and plant nutrients. This study evaluated the chemical and biochemical properties of Dystrophic and EutroferricLatossolos Vermelhos (Oxisols) under corn and after SS application at different rates for 16 years. The field experiment was carried out in Jaboticabal, São Paulo State, Brazil, using a randomized block design with four treatments and five replications. Treatments consisted of control - T1 (mineral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil fertility; Enzymatic activity; Soil basal respiration; Microbial biomass; Urban waste. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501303 |
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| Nunes Júnior,Francisco H.; Gondim,Franklin A.; Pereira,Magnum de S.; Braga,Brennda B.; Pontes Filho,Roberto A.; Barbosa,Francisca E. L.. |
| ABSTRACT The aim of this study was to evaluate the initial growth of sunflower seedlings under different concentrations of sanitary landfill leachate, considering the feasibility of its use as source of nutrients for agricultural production. Biometric and vigor variables were analyzed through the measurements of collar diameter, shoot height, number of leaves and shoot and root fresh and dry matters, from January to February 2015. The experimental design was completely randomized in a 5 x 4 factorial scheme: five leachate concentrations (0, 40, 60, 80 and 100 kg N ha-1) x four harvest periods (14, 21, 25 and 29 days after sowing), with five replicates each containing two plants. The data were subjected to analysis of variance and polynomial regression, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urban waste; Helianthus annus L.; Growth analysis. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000800746 |
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| Abreu,Alan H. M. de; Marzola,Leticia B.; Melo,Lucas A. de; Leles,Paulo S. dos S.; Abel,Elton L. S.; Alonso,Jorge M.. |
| ABSTRACT This study aimed to verify the potential of urban solid wastes as substrate for production of seedlings of Lafoensia pacari. Five treatments were tested, four with solid wastes and one standard substrate, namely: sewage sludge from Alegria Wastewater Treatment Plant (WTP); sewage sludge from Ilha do Governador WTP; sewage sludge from Sarapuí WTP; domestic garbage compost (Fertlurb); and a commercial substrate made of biostabilized pine bark (standard substrate). The wastes received 20% (in volume) of shredded coconut fiber. At 105 days after sowing, the seedlings were evaluated for different quality parameters. Seedlings produced with Sarapuí WTP sewage sludge showed the best results in all the parameters, followed by seedlings produced with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sewage sludge; Urban waste; Biosolid. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000200083 |
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