The different agricultural production systems used cause impacts on physical attributes and on the availability of soil nutrients. In the south of Brazil, alternatives have been investigated for the use of paddy soils such as beef cattle farming associated with the diversification of agricultural crops as well as their impacts in the dynamics of soil attributes with a view to greater sustainability of production systems in lowlands. Thus, the objective of this work was to evaluate changes in physical attributes, availability of nutrients and soil organic matter content in an Albaqualfs under systems: (BC) beef cattle, (R/BC) irrigated rice and beef cattle and (S/C/BC) soybeans, corn and beef cattle, with management systems BC and S/C/BC stablished on large-based ridges conducted under no-tillage in an Albaqualfs. Soil sampling was carried out in October 2018, with 4 replications in each management, in the layers from 0.00 to 0.05 m, 0.05 to 0.10 m and 0.10 to 0.20 m, in triplicate, for determination bulk density (Bd), particle size distribution, macroporosity (Ma), microporosity (Mi), total porosity (Tp), water retention curve (WRC), pH in water, phosphorus (P), potassium (K), aluminum (Al), calcium (Ca), magnesium (Mg) and soil organic matter (OM). The mean weighted diameter (MWD) of the aggregates decreased with increasing depth, being greater values obtained in BC, standing out for higher values of macroporosity and macroaggregates in the 0.00 to 0.05 m layer. For the chemical variables P and Al, higher values were found in the BC, in the 0.00 to 0.05 m layer. The OM contents were higher in this same management system, in the 0.10 to 0.20 m layer; however, it did not differ from the R/BC. In the 0.00 to 0.05 m layer, the S/C/BC showed higher Ca and Mg values than the other management systems.

所使用的不同农业生产系统会对物理属性和土壤养分的可用性产生影响。在巴西南部，为了提高低地生产系统的可持续性，已经研究了使用稻田的替代方法，例如与农作物多样化相关的肉牛养殖及其对土壤属性动态的影响. 因此，这项工作的目的是评估以下系统中 Albaqualfs 的物理属性、养分可用性和土壤有机质含量的变化：（BC）肉牛、（R/BC）灌溉稻和肉牛和（S/C /BC) 大豆、玉米和肉牛，管理系统 BC 和 S/C/BC 建立在 Albaqualfs 的免耕大垄上。土壤取样于 2018 年 10 月进行，每个管理 4 次重复，在 0.00 至 0.05 m、0.05 至 0.10 m 和 0.10 至 0.20 m 层，一式三份，用于测定容重（Bd）、粒度分布、大孔隙率 (Ma)、微孔隙率 (Mi)、总孔隙率 (Tp)、保水曲线 (WRC)、水中 pH、磷 (P)、钾 (K)、铝 (Al)、钙 (Ca)、镁 (Mg) ) 和土壤有机质 (OM)。聚集体的平均加权直径 (MWD) 随着深度的增加而减小，在 BC 中获得的值更大，突出了 0.00 至 0.05 m 层中大孔隙率和大聚集体的更高值。对于化学变量 P 和 Al，在 BC 的 0.00 至 0.05 m 层中发现了更高的值。OM含量在同一管理体系中较高，在0.10～0.20 m层；但是，它与 R/BC 没有区别。在 0.00 至 0.05 m 层，S/C/BC 显示出比其他管理系统更高的 Ca 和 Mg 值。