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Effects of Crop Systems and Acidity Correction on Soil Physical Attributes in Brazil

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alissa
1 diapositives · 208 Views · Aug 06, 2014

This study evaluates how different crop systems and materials for acidity correction influence soil physical properties. Conducted in Botucatu, São Paulo, Brazil, the research utilized a completely randomized block design with various seasonal crop rotations and supplementary liming treatments. Results indicated that surface application of materials for acidity correction significantly enhances total soil porosity and aggregate stability. Moreover, diverse crop rotations, particularly involving Brachiaria ruziziensis, positively affected soil structure, demonstrating the importance of crop diversity in soil health management.

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Effects of Crop Systems and Acidity Correction on Soil Physical Attributes in Brazil
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  1. Soil physical attributes affected by crop systems and materials for acidity correction Gustavo Spadotti Amaral CASTRO & Carlos Alexandre Costa CRUSCIOL Department of Plant Production/Agriculture FCA/UNESP-BOTUCTU, SP. gsacastro@hotmail.com Support: INTRODUCTION Tillage soil waterinfiltration NutrientCycling Carbonaccumulation waterretention Organic soil OBJECTIVE This research was conducted aiming to evaluate the effects of crop systems and materials for acidity correction on soil physical attributes. MATERIAL AND METHOD Location:Botucatu, São Paulo State/Brazil.Experimental design :completely randomized block, with subdivided plots and eight replications. Plots:I SEASON-FALLOW: soybean/fallow/maize/fallow; II SEASON-OFF SEASON: soybean/white oat /maize/common bean; III SEASON-GREEN MANURE: soybean/millet/maize/cowpea; IV SEASON-LIVESTOCK: soybean/B. ruziziensis/maize/B. ruziziensis. Subplots:superficial liming and Ca-Mg silicate application, to raise base saturation up to 70%, and a control without any correction source. Determinations:Aggregate stability, soil density, macro, micro and total porosity, soil penetration resistance and moisture. Data analyses:Means were compared by the t test (LSD) at a probability level of 5%. RESULTS CONCLUSION • Superficial application of materials for acidity correction increases soil total porosity, accentuated down to 0.20 m and 0.10 m after silicate and lime application, respectively. • B. ruziziensiscultivated between summer crops increases aggregate stability-index down to 0.10 m the soil profile. • Soil structuring is harmed by the cultivation of only a crop per season, decreasing aggregate stability and increasing penetration resistance in superficial soil layers.