Temperatura e atributos físico-químicos de um latossolo em recuperação com adubação verde, gramínea e lodo de esgoto, cultivado com Gonçalo-Alves
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Data
2010-12-03
Autores
Miranda, Luiz Paulo Montenegro de [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Reduzir as variações térmicas do solo com a cobertura vegetal favorece o armazenamento de água e aumento nos teores de matéria orgânica e nutrientes disponíveis às plantas. Este trabalho teve por objetivo avaliar a temperatura e alguns atributos físicos e químicos de um Latossolo em recuperação com adubos verdes, gramínea e lodo de esgoto, cultivado com Gonçalo-alves. O experimento foi realizado em área de empréstimo no município de Selvíria/MS. O delineamento experimental foi em blocos com cinco tratamentos e cinco repetições, os tratamentos foram: Solo Exposto (testemunha); espécie arbórea Gonçalo-alves; Gonçalo-alves + crotalária; Gonçalo-alves + feijão-de-porco; Gonçalo-alves + braquiária (Brachiaria decumbens) + lodo (60 t ha-1), e comparadas com uma condição natural de Cerrado (mata adjacente). No tratamento com Gonçalo-alves + braquiária + lodo os valores de P-resina foram elevados em todas as camadas, proporcionando incrementos de Ca+2 e Mg+2 e elevação da CTC, evidenciando os efeitos do lodo como fertilizante. Não foram observadas contribuições dos adubos verdes sobre a fertilidade do solo, apenas sobre a macroporosidade do solo. Houve melhor estruturação do solo com aumento do tamanho e da estabilização de agregados em água, na superfície para Gonçalo-alves + braquiária + lodo, assim como maior diâmetro médio ponderado de agregados, semelhante ao solo de Cerrado. A umidade do solo foi maior no Cerrado e em Gonçalo-alves + braquiária + lodo com cobertura vegetal permanente. O efeito da gramínea foi capaz de reduzir a temperatura do solo na superfície, principalmente para o verão. A capacidade térmica do solo foi maior para todos os tratamentos em relação ao Cerrado. Foi observado para todos os tratamentos correlação positiva entre a capacidade térmica (seco e úmido)...
Reduce the temperature variations of the soil with plant cover promotes the storage of water and increase in soil organic matter and nutrients available to plants. This study aimed to evaluate the temperature and some physical and chemical attributes of a soil in recovery with green manure, sewage sludge and grass, grown with Gonçalo-alves. The experiment was carried out on loan in Selvíria/MS. The experiment was arranged in blocks with five treatments and five replicates, the treatments were: Bare Soil (control) tree species Gonçalo- alves; Gonçalo-alves + sunn; Gonçalo-alves + jack bean ; Gonçalo-alves + Brachiaria (Brachiaria decumbens) + sludge (60 t ha-1), and compared to a natural condition of Cerrado (adjacent forest). In dealing with Gonçalo-alves + Brachiaria + sludge silt values Brachiaria resin-P were elevated in all layers, providing increments of Ca+2 and Mg+2 and elevation of CEC, showing the effects of sludge as fertilizer. There were no contributions from the green manures on soil fertility, only on the soil macroporosity. There was a better soil structure with increasing size and the stabilization of aggregates in water, surface-to Goncalo alves Brachiaria + + sludge, and increased mean weight diameter of aggregates, similar to the Cerrado soil. Soil moisture was higher in the Cerrado and Gonçalo-alves Brachiaria + Brachiaria + sludge with permanent vegetative cover. The effect of grass was able to reduce the soil temperature at the surface, especially for the summer. The heat capacity of soil was higher for all treatments in relation to Savannah. Was observed for all treatments positive correlation between the heat capacity (dry and wet) and bulk density. The temperature was positively correlated with soil bulk density only in treatments with Gonçalo-Alves, Gonçalo- alves + sunn and Gonçalo-alves + bean pork... (Complete abstract click electronic access below)
Reduce the temperature variations of the soil with plant cover promotes the storage of water and increase in soil organic matter and nutrients available to plants. This study aimed to evaluate the temperature and some physical and chemical attributes of a soil in recovery with green manure, sewage sludge and grass, grown with Gonçalo-alves. The experiment was carried out on loan in Selvíria/MS. The experiment was arranged in blocks with five treatments and five replicates, the treatments were: Bare Soil (control) tree species Gonçalo- alves; Gonçalo-alves + sunn; Gonçalo-alves + jack bean ; Gonçalo-alves + Brachiaria (Brachiaria decumbens) + sludge (60 t ha-1), and compared to a natural condition of Cerrado (adjacent forest). In dealing with Gonçalo-alves + Brachiaria + sludge silt values Brachiaria resin-P were elevated in all layers, providing increments of Ca+2 and Mg+2 and elevation of CEC, showing the effects of sludge as fertilizer. There were no contributions from the green manures on soil fertility, only on the soil macroporosity. There was a better soil structure with increasing size and the stabilization of aggregates in water, surface-to Goncalo alves Brachiaria + + sludge, and increased mean weight diameter of aggregates, similar to the Cerrado soil. Soil moisture was higher in the Cerrado and Gonçalo-alves Brachiaria + Brachiaria + sludge with permanent vegetative cover. The effect of grass was able to reduce the soil temperature at the surface, especially for the summer. The heat capacity of soil was higher for all treatments in relation to Savannah. Was observed for all treatments positive correlation between the heat capacity (dry and wet) and bulk density. The temperature was positively correlated with soil bulk density only in treatments with Gonçalo-Alves, Gonçalo- alves + sunn and Gonçalo-alves + bean pork... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Solos - Degradação, Solos - Manejo, Adubação verde, Soil - Physical attributes
Como citar
MIRANDA, Luiz Paulo Montenegro de. Temperatura e atributos físico-químicos de um latossolo em recuperação com adubação verde, gramínea e lodo de esgoto, cultivado com Gonçalo-Alves. 2011. 72 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira, 2011.