soil microorganisms (Simon-Sylvestre and Fournier,
1979; Wardle and Parkinson, 1990). The microbial
biomass plays an important role in the soil ecosystem
where they fulfill a crucial role in nutrient cycling and
decomposition (De-Lorenzo et al., 2001). Herbicides,
when applied could then accumulate to toxic levels in the
soil and become harmful to microorganisms, plant, wild
life and man (Amakiri, 1982). There is an increasing
concern that herbicides not only affect the target
organisms (weeds) but also the microbial communities
present in soils, and these non-target effects may reduce
the performance of important soil functions (De-Lorenzo
et al., 2001). There is an increasing concern that
herbicides not only affect the target organisms (weeds),
but also the microbial communities present in soils, and
these non-target effects may reduce the performance of
important soil functions.
Atrazine is an example of triazine herbicides with the
trade name, Multrazine. The triazines were shown to
inhibit photosystem II, but have no effect on photosystem
I (Trebst, 2008) while paraquat is an example of
quaternary ammonium herbicides with the trade name,
Gramoxone. Paraquat is known to act on the Phosystem
I within the photosynthetic membrane. On
microorganisms, they have inhibitory effects, repressing
effects, reduces enzyme activity and mycelia (growth).
Having known the actions of these herbicides on plants,
this work is targeted to ascertain the common soil
microorganisms in the study site and how herbicides
affect their population and distribution.
soil microorganisms (Simon-Sylvestre and Fournier,1979; Wardle and Parkinson, 1990). The microbialbiomass plays an important role in the soil ecosystemwhere they fulfill a crucial role in nutrient cycling anddecomposition (De-Lorenzo et al., 2001). Herbicides,when applied could then accumulate to toxic levels in thesoil and become harmful to microorganisms, plant, wildlife and man (Amakiri, 1982). There is an increasingconcern that herbicides not only affect the targetorganisms (weeds) but also the microbial communitiespresent in soils, and these non-target effects may reducethe performance of important soil functions (De-Lorenzoet al., 2001). There is an increasing concern thatherbicides not only affect the target organisms (weeds),but also the microbial communities present in soils, andthese non-target effects may reduce the performance ofimportant soil functions.Atrazine is an example of triazine herbicides with thetrade name, Multrazine. The triazines were shown toinhibit photosystem II, but have no effect on photosystemI (Trebst, 2008) while paraquat is an example ofquaternary ammonium herbicides with the trade name,Gramoxone. Paraquat is known to act on the PhosystemI within the photosynthetic membrane. Onmicroorganisms, they have inhibitory effects, repressingeffects, reduces enzyme activity and mycelia (growth).Having known the actions of these herbicides on plants,this work is targeted to ascertain the common soilจุลินทรีย์ในการศึกษาและสารเคมีกำจัดวัชพืชส่งผลกระทบต่อประชากรและการกระจายของพวกเขา
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