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Título: | Viabilidade no uso do P4TREE® para suprimento de fósforo na produção de mudas de espécies florestais nativas |
Título(s) alternativo(s): | Feasibility of using P4TREE® for phosphorus supply in the production of native forest seedlings |
Autores: | Pereira, Eduardo Gusmão Tristão, Juliana Cristina Tristão, Juliana Cristina Gomes, Marcelo Pedrosa |
Palavras-chave: | Economia circular Fotossíntese Mata Atlântica Sustentabilidade Urina Atlantic Forest Circular economy Photosynthesis Sustainability Urine |
Data do documento: | 5-Nov-2024 |
Editor: | Universidade Federal de Lavras |
Citação: | SANTOS, Larissa dos. Viabilidade no uso do P4TREE® para suprimento de fósforo na produção de mudas de espécies florestais nativas. 2024. 40 p. Dissertação (Mestrado em Agronomia/Fisiologia Vegetal) - Universidade Federal de Lavras, Lavras, 2024. |
Resumo: | Alternative phosphate fertilizers have been gaining prominence in scientific research due to the need for sustainable nutrient utilization. P4TREE® is a novel phosphorus (P) adsorption technology derived from modified serpentinite interacting with human urine, with potential application as a fertilizer for forest seedlings aimed at restoring degraded areas. Our objectives were: (i) to assess the development of native species from the Atlantic Forest, Parapiptadenia rigida (Bentham) Brenan and Peltophorum dubium (spreng.) Taub, under different P doses; (ii) to determine the optimal method of P4TREE® application and evaluate its ecotoxicity; (iii) to evaluate the feasibility of P4TREE® in supplying P and improving the nutritional status of native Atlantic Forest tree species. In the first greenhouse experiment, seedlings of tree species were fertilized with different P doses (no added P - MAP 0%; MAP 25%; MAP 50%; and MAP 100%). Following desorption tests, an ecotoxicological assay was conducted to assess potential toxicity and determine the best P4TREE® application method. Based on these results, a subsequent experiment was conducted using solid P4TREE® incorporated into the substrate. Both species exhibited low nutritional requirements. P doses did not influence morphofunctional aspects, P concentration in plant tissues, gas exchange, or chlorophyll a fluorescence as evaluated. Desorption of P4TREE® in NaOH solution released 10 mg P L-1 of solution. However, P4TREE® in NaOH solution inhibited seed germination and led to death of native seedlings when applied via fertigation. Solid P4TREE® incorporated into the substrate was found to be the optimal application method. However, both species exhibited compromised growth when P4TREE® was the P source, contrasting with serpentinite. P. dubium showed higher sensitivity to P4TREE® than P. rigida, resulting in reduced height, leaf area, diameter, photosynthetic rate, and maximum quantum yield of photosystem II. We concluded that P4TREE® negatively affected P. dubium growth but did not affect leaf area, height, diameter, leaf dry mass, and stem dry mass of P. rigida. However, when serpentinite was used, P. dubium exhibited better morphofunctional characteristics, suggesting that components in urine and/or the P4TREE® formation process may cause phytotoxicity. Our findings suggest that further investigations into P4TREE® as a P source should consider urine exposure time and control of alkaline pH. |
URI: | http://repositorio.ufla.br/jspui/handle/1/59655 |
Aparece nas coleções: | Agronomia/Fisiologia Vegetal - Mestrado (Dissertações) |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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DISSERTAÇÃO_Viabilidade no uso do P4TREE® para suprimento de fósforo na produção de mudas de espécies florestais nativas.pdf | 1,21 MB | Adobe PDF | Visualizar/Abrir | |
INDICADORES DE IMPACTO.pdf | 156,26 kB | Adobe PDF | Visualizar/Abrir |
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