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Infiltração de água e resistência do solo à penetração em sistemas de cultivos integrados e em área de pastagem degradada

2020; University of Western Sao Paulo, UNOESTE; Volume: 16; Issue: 5 Linguagem: Inglês

10.5747/ca.2020.v16.n5.a397

1809-8215

Leonnardo Cruvinel Furquim, Epitácio José de Souza, Nelmício Furtado da Silva, Daniel Noe Coaguila Nuñez, Juliana Silva Rodrigues Cabral, José Mateus Kondo Santini, Beatriz Caetano da Silva Leão, Luís F. Stone,

Soil erosion and sediment transport

The objective of this study was to quantify water infiltration and resistance to penetration in a Latossolo Vermelho Distrófico (Typic Haplustox) cultivated with different land use systems and in a degraded pasture area. The studied areas are located in Rio Verde, state of Goiás (Brazil), where seven treatments were evaluated: T1 -Degraded; T2 -Fertilized pasture; T3 -Conventional; T4 -Crop-forest integrationsystem(CFI); T5 -Livestock-forest integrationsystem(LFI); T6 -crop-livestock-forest integration system (CLFI -hay); and T7 -crop-livestock-forest integration system (CLFI-silage). The water infiltration speed curves and the respective basic infiltration rate (BIR) values for the areas under study were determined. The infiltration of water into the soil was determined “in situ” by the double ring infiltrometer method and empirically through models proposed by Kostiakov and Kostiakov-Lewis. The soil resistance to penetration, up to a depth of 0.3 m, was performed using an impact penetrometer. The greatest infiltration in relation to time occurred in treatment T7. The highest values of BIR occurred in treatment T5. The model proposed by Kostiakov showed greater adjustment to the infiltration speed data obtained in the field. The lower resistance of the soil to penetration is provided by the diversity of species in the T4 treatment. The different management systems for recovering degraded pastures influenced the soil quality indicators studied, but there is a need for further studies to adjust the stocking rates in integrated systems in order not to return to the degradation scenario.