Residual effect of urea and herbicides on hexosamine content and urease and proteinase activities in a grassland soil

Namdeo, K. N.; Dube, J. N.

doi:10.1016/0038-0717(73)90031-x

Cited by 11 publications

(1 citation statement)

References 7 publications

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“…On the other hand, several reports indicate that protease activity in soils was individually inhibited by the application of urea at 200-N kg ha -1 and of herbicides dalapon and paraquat at 10 kg ha -1 by 13 and 18%, respectively. The combination of urea and herbicides at the same concentrations reduced the protease activity in soils by 41-56% indicating the synergistic interaction at the end of the 10-day incubation (Namdeo and Dube, 1973), In contrast, thiram at 10 ppm decreased urease activity in both sandy and organic soils after 7 days (Tu 1990). Gooty Jaffer Mohiddin et al (2011) insecticides, acephate and imidacloprid at 10, 25, 50 µg g -1 levels, individually caused increments of 30-77 and 46-54% increase in urease activity on the control in black soil at a 10-day interval, respectively.…”

Section: Discussionmentioning

confidence: 99%

Interaction Effects of Insecticides on Enzyme Activities in Black Clay Soil from Groundnut (Arachis hypogaea L.) Fields

Nasreen¹,

Mohiddin²,

Srinivasulu³

et al. 2012

EREM

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In practice pesticides are extensively used in agriculture as a part of pest control strategies. Two insecticides, endosulfan (organochlorine) and profenophos (organophosphate), were assessed for their effects on the activities of protease (in terms of tyrosine formed from casein) and urease (as ammonia released from urea) in soil, collected from a fallow groundnut field by applications of insecticides at normal field rates and at higher concentrations (1.0, 2.5, 5.0, 7.5, 10.0 kg ha -1 ), in a laboratory study. The results showed a strong positive influence on protease and urease enzyme activities in soil treated with 2.5 and 5.0 kg ha -1 dry soil and they were significantly (P ≤ 0.05) higher than the control over the course of incubation. In soil treatment, there was a significant increase in protease and decrease in urease activities after 24h of incubation which continued up to 20 days. However, a significant decrease in both protease and urease enzyme activities was observed in 30 and 40 days of incubation.

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Section: Discussionmentioning

confidence: 99%