Soil enzyme activities after application of fungicide Quadris^R at increasing concentration rates

Abstract

The study aimed to assess the effects of fungicide QuadrisR on activities of soil enzymes contributed to soil nutrient turnover. A batch laboratory experiment with QuadrisR-amended (0 mg/kg ds (dry soil) – 35.00 mg/kg ds) loamy sand soil was conducted, and shifts in soil physical environments and enzyme activities (beta-glucosidase, urease, acid and alkaline phosphatases, arylsulfatase and dehydrogenase) were evaluated on experimental days 1, 30, 60, 90 and 120. The results indicated that QuadrisR changed both soil properties and enzyme activities. The most sensitive environmental parameter to fungicide input was soil pH. The most suscaptable to QuadrisR enzymes were dehydrogenase and arylsulfatase, and the most resistant – urease. The mean overall dehydrogenase activity decreased by 33%, whereas the profile of arylsulfatase activity tended to permanent decrease over time. The general pattern of enzyme responses to QuadrisR was an immediate-early (days 1 – 30) decline of enzyme activities after fungicide application, except that of arylsulfatase. Beta-glucosidase manifested a temporal profile of steady-state stimulation under the lowest (2.90 mg/kg ds) and low sensitivity to the higher (14.65 mg/kg ds and 35.00 mg/kg ds) fungicide concentrations.

Impact of Selected Plant Extracts on Winter Wheat (Triticum aestivum L.) Seedlings: Growth, Plant Health Status and Soil Activity

“…They also contribute to reducing the activity of catalase in the soil, which protects cells from toxic H 2 O 2 produced in the cytoplasm and peroxisomes, and which is sensitive to various environmental stressors [55,56]. Additionally, fungicides may affect soil acidification, most likely due to their chemical composition or via chemical reactions occurring in the soil, but also disruptions in the biological balance of the soil [57]. Numerous studies have reported the reduction in enzyme activity, especially dehydrogenases, but also catalase, urease, alkaline phosphatase, and protease, with increasing soil acidification [58][59][60][61].…”

Integration of organics in nutrient management for rice-wheat system improves nitrogen use efficiency via favorable soil biological and electrochemical responses

“…The absorbance of the products was measured using a spectrophotometer (Specord 200 plus, Analytic Jena, Germany). Acid and alkaline phosphatase activity of the soil was evaluated by the method of Tabatabai and Bremner, 1969 ; Boteva et al., 2022 . Toluene solution modified universal buffer, 0.5 ml CaCl 2 was added in soil and swirled.…”

Increasing the Efficiency of the Rice–Wheat Cropping System through Integrated Nutrient Management

“…Therefore, nitrogen has been recognized as the primary nutrient limiting crop yield in various agro-ecological regions [30,31]. Nitrogen fertilizer has a significant impact on the physiological aspects of plants, including respiration rate, water balance, signaling pathways, overall growth and development [32][33][34]. Recent research has shown that applying fertilizers containing phosphorus (P) and potassium (K) together can enhance the uptake of nitrogen (N) fertilizers and improve N efficiency [35].…”