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Proceedings of the International Academy of Ecology and Environmental Sciences, 2017, 7(4): 90-96
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Article

Estimation of soil organic carbon and soil respiration in a dry forest - Guvvalacheruvu Reserve Forest of Kadapa hill ranges

C. Venkata Ramana1, K. Naga Raju1, P. Osman Basha2, M. Sridhar Reddy1
1Department of Environmental Science, Yogi Vemana University, Kadapa, Andhra Pradesh, India
2Department of Genetics and Genomics, Yogi Vemana University, Kadapa, Andhra Pradesh, India

Received 9 July 2017;Accepted 18 October 2017;Published 1 December 2017
IAEES

Abstract
Forest soils are considered as one of the major carbon sinks in terrestrial ecosystems owing to their higher amounts of soil organic matter/carbon. The objective of the study is to estimate the SOC content and soil respiration, their spatial variations and the relationship between them. The study was undertaken in a dry deciduous forest of Kadapa hill ranges. The samples were taken from two study sites namely site 1 at foot hills and site 2 on the hill slopes. The samples were analyzed for SOC by Walkley-Black method and soil respiration by alkali absorption method and several physio-chemical parameters were also measured. The SOC values up to 30 cm depth indicated that site 1 registered a high value (32.3 t/ha) than the site 2 value (27.59 t/ha). The mean SOC values of the upper surface layer (0 - 10cm) in the two study sites were 0.65¡À0.092 and 0.596¡À0.083 respectively and the average values of SOC in the bottom layer (10 - 30cm) are 0.78¡À0.105 and 0.32¡À0.051 respectively in the two study sites. A negative relationship between SOC and bulk density was recorded. The mean soil respiration values were found to be 108.9 mg/m2/hr in site 1 and 78.1 mg/m2/hr in site 2. A strong positive correlation between SOC and soil respiration was observed. The variation in SOC values in the study site can be related to soil depth and location and the observed values were found to be lesser than the values in other Indian tropical deciduous forests.

Keywords bulk density;dry deciduous forests;soil organic carbon;soil respiration.


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