Soil Carbon Stability Assessment by Humus Desorption Using Simple First Order Exponential Equation in a Toposequence of Western Himalayan Region
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A chemical method based on batch desorption of adsorbed humus on clay-humus complex by sodium hydroxide-sodium pyrophosphate solution was used to assess the stability of humus C through the desorption rate constant using simple first order exponential equation in a toposequence of Western Himalaya region of India. The rate constant values were significantly (p < 0.0001) higher in hill top (0.305 day−1) and narrow valley (0.184 day−1) than side slope (0.125 day−1) and broad valley (0.11 day−1) suggesting higher stability of soil C in side slope and broad valley. This variation implies that clay particles are active in binding humus C and soil texture plays an important role in stabilizing soil C.
KeywordsCarbon Himalaya Humus Stability Toposequence
The research work was carried out under ‘Professional Attachment Training’ as a part of FOCARS training. The first author is thankful to Dr. B.S. Dwivedi, Head of Division, Soil Science and Agricultural Chemistry, IARI, New Delhi for providing facilities and support.
Compliance with Ethical Standards
Conflict of interest
There is no conflict of interest.
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