Soil enzyme activities are often used as indicators of soil contamination. The responses of the activities of specific soil enzymes, dehydrogenase, acid phosphatase, β-glucosidase, carboxylesterase, and urease to different land uses (soybean and rice crops, and a reference site) were analyzed. Changes in activity at the start and end of each crop cycle were quantified. In general, the catalytic activity of all enzymes was lower in both crops than in the reference site. Regarding the soybean crop, all the enzyme activities decreased at the start of the crop cycle (27.5–53%, with respect to reference site values), whereas only acid phosphatase, β-glucosidase and carboxylesterase were lower at the end of the cycle (70.3%, 29.44%, and 45.79%; respectively). In the rice crop, dehydrogenase, acid phosphatase, and β-glucosidase activities were lower at the start of the cycle (27.88%, 50.32%, and 23.21%; respectively), with respect to reference site. However, the enzyme activity was lower at the end of the cycle compared to the reference site (dehydrogenase 20.47%, acid phosphatase 72.72%, β-glucosidase 57.77%, carboxylesterase 27.59%), except for urease activity. Current results suggested that the use of enzyme activities as indicators of soil quality is a viable approach to assess the pesticide impact in agricultural soils of Argentina.

土壤酶活性常被用作土壤污染的指标。分析了特定土壤酶、脱氢酶、酸性磷酸酶、β-葡萄糖苷酶、羧酸酯酶和脲酶的活性对不同土地利用（大豆和水稻作物以及参考地点）的响应。量化每个作物周期开始和结束时的活性变化。一般来说，两种作物中所有酶的催化活性都低于参考位点。对于大豆作物，所有酶活性在作物周期开始时下降（27.5-53%，相对于参考位点值），而在周期结束时只有酸性磷酸酶、β-葡萄糖苷酶和羧酸酯酶较低（ 70.3%、29.44% 和 45.79%；）。在水稻作物中，脱氢酶、酸性磷酸酶、和 β-葡萄糖苷酶活性在循环开始时较低（分别为 27.88%、50.32% 和 23.21%），相对于参考位点。然而，与参考位点相比，循环结束时的酶活性较低（脱氢酶 20.47%、酸性磷酸酶 72.72%、β-葡萄糖苷酶 57.77%、羧酸酯酶 27.59%），但脲酶活性除外。目前的结果表明，使用酶活性作为土壤质量指标是评估农药对阿根廷农业土壤影响的可行方法。