Effect of butachlor (G) on soil enzyme activity

Rasool, Nazima; Reshi, Zafar A.; Shah, Manzoor Ahmad

doi:10.1016/j.ejsobi.2014.02.002

Cited by 25 publications

(18 citation statements)

References 42 publications

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“…Furthermore, soil enzymes play a very important role in material cycle and energy conversion in the soil ecosystem [ 14 ]. Soil enzymes are important materials for catalyzing biochemical reactions, and provide an important indicator for measuring movement and strength of various soil biochemical processes [ 15 ]. However, enzyme activities can be restricted with continuous cropping.…”

Section: Introductionmentioning

confidence: 99%

Breaking continuous potato cropping with legumes improves soil microbial communities, enzyme activities and tuber yield

et al. 2017

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This study was conducted to explore the changes in soil microbial populations, enzyme activity, and tuber yield under the rotation sequences of Potato–Common vetch (P–C), Potato–Black medic (P–B) and Potato–Longdong alfalfa (P–L) in a semi–arid area of China. The study also determined the effects of continuous potato cropping (without legumes) on the above mentioned soil properties and yield. The number of bacteria increased significantly (p < 0.05) under P–B rotation by 78%, 85% and 83% in the 2, 4 and 7–year continuous cropping soils, respectively compared to P–C rotation. The highest fungi/bacteria ratio was found in P–C (0.218), followed by P–L (0.184) and then P–B (0.137) rotation over the different cropping years. In the continuous potato cropping soils, the greatest fungi/bacteria ratio was recorded in the 4–year (0.4067) and 7–year (0.4238) cropping soils and these were significantly higher than 1–year (0.3041), 2–year (0.2545) and 3–year (0.3030) cropping soils. Generally, actinomycetes numbers followed the trend P–L>P–C>P–B. The P–L rotation increased aerobic azotobacters in 2–year (by 26% and 18%) and 4–year (40% and 21%) continuous cropping soils compared to P–C and P–B rotation, respectively. Generally, the highest urease and alkaline phosphate activity, respectively, were observed in P–C (55.77 mg g–1) and (27.71 mg g–1), followed by P–B (50.72 mg mg–1) and (25.64 mg g–1) and then P–L (41.61 mg g–1) and (23.26 mg g–1) rotation. Soil urease, alkaline phosphatase and hydrogen peroxidase activities decreased with increasing years of continuous potato cropping. On average, the P–B rotation significantly increased (p <0.05) tuber yield by 19% and 18%, compared to P–C and P–L rotation respectively. P–L rotation also increased potato tuber yield compared to P–C, but the effect was lesser relative to P–B rotation. These results suggest that adopting potato–legume rotation system has the potential to improve soil biology environment, alleviate continuous cropping obstacle and increase potato tuber yield in semi–arid region.

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Section: Introductionmentioning

confidence: 99%

Breaking continuous potato cropping with legumes improves soil microbial communities, enzyme activities and tuber yield

et al. 2017

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“…Dehydrogenase activity (DHA) was determined according to Rasool [12] as an index of microbial activity. 20 grams of soil from each treatment were mixed with 0.2 grams of CaCO 3 .…”

Section: Soil Enzyme Activity Analysismentioning

confidence: 99%

Degradation of S-metolachlor and its Effects on Soil Enzymes and Microbial Communities in Vegetable Field Soil

Huang¹,

Cui²,

Zhou³

et al. 2017

JRST

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S-metolachlor is a promising alternative to metolachlor. However, the extensive use of S-metolachlor as herbicide in vegetable fields in China has caused concerns about its environmental fate. Here we investigated the effects of temperature, relative humidity (RH) and PH on the degradation rate of S-metolachlor in vegetable soil. The degradation rates of S-metolachlor increased with increasing temperatures and RH and either acidic or basic PH facilitates S-metolachlor degradation. The degradation of S-metolachlor under these conditions followed the first-order kinetics resulting in the half-lives (T-1/2) ranging from 12.18 d to 70.71 d at 5-35°C, and 27.28 d to 53.72 d at RH 30-90%; and 29.62-19.69 d at pH 6-8. Stronger response of soil enzymes including catalase, dehydrogenase, urease and cellulase to S-metolachlor was detected in soil with high organic matter. PLFA profiles showed that, totally, the microbe populations including actinomycetes, fungi and bacteria increased gradually in the first 14 days after the treatment and decreased from 14d to 28d after the treatment. All the S-metolachlor treatments caused the increase of aerobe and anaerobe. High S-metolachlor concentration, 13.9 mg/kg, could cause significant variation at the first 2 weeks, stimulating growth of the entire soil microbial community. These findings might have practical implications for the fate of S-metolachlor residue in vegetable fields. Environmental factors, especially temperature, relative humidity and pH should be considered in combination with the appropriate application dose of S-metolachlor for achieving satisfactory weed-control efficacy, reducing runoff, and minimizing effects on environmental quality.

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“…Soil enzyme activity is not only influenced by exudates of plant roots and soil microorganisms but also by pesticides that are used in the soil. In a study that simulated normal soil conditions of rice paddies, Rasool et al reported that urease activity was reduced by butachlor G under unflooded conditions, but the response was inconsistent under flooded conditions. Baćmaga et al found that azoxystrobin had an inhibitory effect on the activity of urease and that this effect is stronger when the concentration is increased.…”

Section: Resultsmentioning

confidence: 99%

Enantioselective effects of metalaxyl on soil enzyme activity

et al. 2016

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The enantioselective effects of the chiral pesticide metalaxyl on soil enzyme activity were investigated. Incubation experiments were conducted to investigate the effects of metalaxyl enantiomers at different concentrations on the activities of urease, invertase, and catalase as well as the type of activity change (activation vs. inhibition) at different times during incubation. The results indicated that the effects of metalaxyl on the activity of soil enzymes were not only related to the concentration of the enantiomers and soil incubation time, but also to the chiral configuration, suggesting the effects were enantioselective. A pattern of inhibition-recovery-slight stimulation was observed in urease activity of the soil samples treated with metalaxyl enantiomers, but the effects of (-) -R-metalaxyl were stronger than those of (+)-S-metalaxyl at the same concentration. Invertase activity in soil samples treated with metalaxyl enantiomers initially sharply decreased before finally returning to the normal level, and the effects of (+)-S-metalaxyl were stronger than those of (-) -R-metalaxyl at the same concentration. Metalaxyl enantiomers influenced catalase activity in a pattern of slight stimulation-inhibition-recovery, and the effects of (-) -R-metalaxyl were stronger than those of (+)-S-metalaxyl at the same concentration.

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Effect of butachlor (G) on soil enzyme activity

Cited by 25 publications

References 42 publications

Breaking continuous potato cropping with legumes improves soil microbial communities, enzyme activities and tuber yield

Breaking continuous potato cropping with legumes improves soil microbial communities, enzyme activities and tuber yield

Degradation of S-metolachlor and its Effects on Soil Enzymes and Microbial Communities in Vegetable Field Soil

Enantioselective effects of metalaxyl on soil enzyme activity

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