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Effects of transgenic Btcotton on soil fertility and biology under field conditions in subtropical inceptisol

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Title Effects of transgenic Btcotton on soil fertility and biology under field conditions in subtropical inceptisol
Not Available
 
Creator Raman Jeet Singh
I. P. S. Ahlawa
Surender Singh
 
Subject Btcotton .Dehydrogenase .FYM . Microbial activity .Nitrogen .Peanut . Soil
 
Description Not Available
Although there is large-scale adoption of Bt
cotton by the farmers because of immediate financial
gain, there is concern that Btcrops release Bttoxins
into the soil environment which reduces soil chemical
and biological activities. However, the majorities of
such studies were mainly performed under pot experiments,
relatively little research has examined the direct
and indirect effects of associated cover crop of peanut
with fertilization by combined application of organic
and inorganic sources of nitrogen under field conditions.
We compared soil chemical and biological
parameters of Btcotton with pure crop of peanut to
arrive on a valid conclusion. Significantly higher dehydrogenase
enzyme activity and KMnO4-N content
of soil were observed in Btcotton with cover crop of
peanut over pure Btcotton followed by pure peanut at
all the crop growth stages. However, higher microbial
population was maintained by pure peanut over intercropped
Btcotton, but these differences were related
to the presence of high amount of KMnO4-N content
of soil. By growing cover crop of peanut between Bt
cotton rows, bacteria, fungi, and actinomycetes population
increased by 60%, 14%, and 10%, respectively,
overBtcotton alone. Btcotton fertilized by combined
application of urea and farm yard manure (FYM)
maintained higher dehydrogenase enzyme activity,
KMnO4-N content of soil and microbial population
over urea alone. Significant positive correlations were
observed for dry matter accumulation, dehydrogenase
enzyme activity, KMnO4-N content, and microbial
population of soil of Btcotton, which indicates no
harmful effects of Btcotton on soil biological parameters
and associated cover crop. Our results suggest
that inclusion of cover crop of peanut and FYM in Bt
cotton enhanced soil chemical and biological parameters
which can mask any negative effect of the Bttoxin
on microbial activity and thus on enzymatic activities
Not Available
 
Date 2020-03-05T08:41:50Z
2020-03-05T08:41:50Z
2012-02-03
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33589
 
Language English
 
Relation Not Available;
 
Publisher Not Available