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Soil respiration under different forest species in the riparian buffer of the semi-arid region of northwest India

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Title Soil respiration under different forest species in the riparian buffer of the semi-arid region of northwest India
Not Available
 
Creator Pramod Jha and K. P. Mohapatra
 
Subject Semi-arid region, soil respiration, soil moisture, soil temperature, tree species
 
Description Not Available
Soil temperature and soil moisture are the most
important environmental factors controlling soil respiration
(SR) in ecosystems. However, SR and associated
edaphic factors have not been widely studied in
semi-arid regions. In this study, SR was measured in a
riparian zone and the effect of soil temperature and
soil moisture on SR was examined under five forest
species of the semi-arid region. The mean daily SR
rate was 1.82, 2.08, 2.35, 2.27 and 2.07 g C m–2 d–1 in Jatropha
curcas, Leucaena leucocephala, Acacia nilotica,
Azadirachta indica and Prosopis juliflora sites respectively.
It was found that SR was significantly and positively
correlated with soil moisture. A univariate
model of sub-surface soil moisture could explain 77%
of temporal variation in soil CO2 efflux, irrespective of
species and sites. The logarithmic model could best
explain the relationship between SR and soil moisture
at 10–20 cm of soil depth (P < 0.001). There were
negative correlations between SR and soil temperature
under majority of species. Overall, across all species,
soil temperature poorly explained 26% variation in
SR as independent variable. For SR rate–temperature
relationship, a bell-shaped function gave the best fit in
this ecosystem. Under all the species, SR increases
with increase in soil temperature up to 33°C (± 2);
thereafter it decreases gradually under all species.
There was strong evidence that deficit of soil moisture
rather than soil temperature was the main regulating
factor of SR under the semi-arid ecosystems.
Not Available
 
Date 2020-05-15T14:32:54Z
2020-05-15T14:32:54Z
2011-03-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/35673
 
Language English
 
Relation Not Available;
 
Publisher Not Available