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Concentration and stock of carbon in the soils affected by land uses and climates in the western Himalaya, India

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Title Concentration and stock of carbon in the soils affected by land uses and climates in the western Himalaya, India
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Creator S.K. Singh
C.B. Pandey
G.S. Sidhu
Dipak Sarkar
R. Sagar
 
Subject Carbon sequestration Climates Land uses Soil moisture Soil temperature SOC stock
 
Description Not Available
Soils are the third biggest sink of carbon on the earth. Hence, suitable land uses for a climatic condition are
expected to sequester optimum atmospheric carbon in soils. But, information on how climatic conditions and
land uses influence carbon accumulation in the soils on the Himalayan Mountains is not known. This study
reports the impact of four climatic conditions (sub-tropical, altitude: 500–1200 m; temperate 1200–2000 m;
lower alpine 2000–3000 m; upper alpine, 3000–3500 m) and four land uses (forest, grassland, horticulture,
agriculture) on the concentrations and stocks of soil organic carbon (SOC) in upper (0–30 cm) and deeper
(30–100 cm) soil depths on the western Himalayan Mountains of India. The study also explored the drivers
which influenced the SOC stock build up on the mountains. Rainfall and soil moisture showed quadratic
relations, whereas temperature declined linearly with the altitude. SOC stock as well as concentration was the
highest (101.8 Mg ha − 1 in 0–30 cm, 227.97 Mg ha − 1 in 0–100 cm) in temperate and the lowest in subtropical climate (37 Mg ha − 1 in 0–30 cm, 107.04 Mg ha − 1 in 0–100 cm). Pattern of SOC stock build up across
the altitude was: temperate Nlower alpine Nupper alpine Nsub-tropical. SOC stocks in all land uses across the
climatic conditions, except agriculture in lower alpine, was higher (0.7 to 41.6%) in the deeper than upper soil
depth. SOC stocks in both the depths showed quadratic relations with soil temperature and soil moisture.
Other factors like fine soil particles, land-use factor and altitude influenced positively whereas slope and pH,
negatively to the SOC stocks. In all climatic conditions, other than temperate, SOC stocks were greater in
natural ecosystems like forests and pastures (112.5 to 247.5 Mg ha − 1) than agriculture (63 to
120.4 Mg ha − 1). In temperate climate, SOC stock in agriculture (253.6 Mg ha − 1) on well formed terraces
was a little higher than forest (231.3 Mg ha − 1) on natural slope. These observations, suggest that land uses on
temperate climate may be treated as potential sinks for sequestration of the atmospheric carbon. However,
agriculture in subtropical climate need to be pursued with due SOC protection measures like the temperate
climate for greater sequestration of the atmospheric carbon.
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Date 2019-07-24T10:25:03Z
2019-07-24T10:25:03Z
2011-01-01
 
Type Research Paper
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/21699
 
Language English
 
Publisher Elsevier