AVALIAÇÃO DOS ATRIBUTOS FÍSICO-HÍDRICOS DOS SOLOS EM IGUARAÇU-PR: SUBSÍDIOS PARA O MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA
Bibliographic record
Abstract
O conhecimento das propriedades físico-hídricas dos solos subsidia na tomada de decisão sobre a qual, a melhor estratégia para o bom uso e manejo dos solos de determinada área é considerar as particularidades de cada classe e adotar práticas conservacionistas de suporte. Desse modo, o objetivo desse trabalho é avaliar o comportamento físico-hídrico do Latossolo Vermelho e Argissolo Vermelho ambos de textura média, em diferentes tipos de uso da terra no município de Iguaraçu-PR. Foram realizadas coletas nos horizontes superficiais dos solos sob os usos de pastagem, culturas temporárias, cana-de-açúcar e floresta nativa. Para cada tipo de solo e uso foi determinada a densidade dos solos, porosidade total, resistência à penetração, velocidade de infiltração e condutividade hidráulica, de acordo com os critérios estabelecidos no manual de métodos de análise do solo (EMBRAPA, 1997). A permeabilidade foi determinada com o uso do permeâmetro de Guelph, com o método de uma carga hidráulica e a resistência à penetração com o penetrômetro Geotester Pocket. Pode-se concluir que as piores condições encontradas ocorreram no Argissolo sob pastagem e no Latossolo sob cana-de-açúcar, sendo necessárias práticas de manejo que minimizem os impactos, conciliando a exploração econômica do solo e a conservação de suas propriedades. PALAVRAS-CHAVE: Permeabilidade. Qualidade física. Latossolo e Argissolo. EVALUATION OF PHYSICAL-HYDRIC SOIL ATTRIBUTES IN IGUARAÇU-PR: SUBSIDIES FOR MANAGEMENT AND PRESERVATION OF WATER AND SOIL ABSTRACTThe knowledge of the physical-hydric proprieties of soil supports the decision making process in which the best soil management strategy in a given area is taking into account the particularities of each class and adopt conservationist support measures. Thus, the objective of this study is to evaluate the physical-hydric behavior of medium texture Red Oxisol and Red Ultisol under different uses in the city of Iguaraçu, Parana State, Brazil. Samplings were conducted on the surface horizon of soils under pasture, temporary crops, sugarcane crops and native forest. Each soil had its soil density, total porosity, resistance to penetration, infiltration rate and hydraulic conductivity determined in accordance with the established criteria from the soil analysis methods manual. The permeability was determined using a Guelph permeameter with the one hydraulic load method, and the resistance to penetration was measured using an impact penetrometer Geotester Pocket. The tests point to the conclusion that the worst conditions were found in Ultisol under pasture and in Oxisol under sugarcane, making necessary management practices to minimize the environmental impacts in order to conciliate the economic exploitation of soil and the conservation of its properties. KEYWORDS: Permeability. Physical quality. Oxisol and Ultisol. EVALUACIÓN DE LOS ATRIBUTOS FÍSICO-HÍDRICOS DE LOS SUELOS EN IGUARAÇU-PR: SUBSIDIOS PARA EL MANEJO Y CONSERVACIÓN DE SUELOS Y AGUAS RESUMENEl conocimiento de las propiedades físico-hídricas de los suelos subsidia la toma de decisiones en el que la mejor estrategia para el buen uso y manejo del suelo en un área determinada es considerar las particularidades de cada clase y adoptar prácticas de conservación. Así, el objetivo de este estudio es evaluar el comportamiento físico-hídrico del Oxisol y Ultisol ambos de textura media, en diferentes tipos de uso de la tierra en Iguaraçu-PR. Las muestras fueron recolectadas en los horizontes superficiales del suelo en el uso de pastos, cultivos temporales, caña de azúcar y el bosque nativo. Para cada tipo de suelo y su uso se determinó la densidad del suelo, la porosidad, la resistencia a la penetración, velocidad de infiltración y conductividad hidráulica, de acuerdo con los criterios establecidos en el manual de métodos de análise do solo (EMBRAPA, 1997). La permeabilidad se determinó usando el permeámetro de Guelph con el método de una carga hidráulica y la resistencia a la penetración con el penetrometro Geotester Pocket. Se puede concluir que las peores condiciones encontradas se produjeron en el Ultisol a pastos y Oxisol en la caña de azúcar, que requieren prácticas de manejo que minimicen los impactos, con la conciliación de la explotación económica del suelo y la preservación de sus propiedades. PALABRAS CLAVE: Permeabilidad. Calidad física. Oxisol y Ultisol.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".