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Status of Carbon Pool in Grazed and Un-Grazed Range Lands, Pabbi Hills, Pakistan

Status of Carbon Pool in Grazed and Un-Grazed Range Lands, Pabbi Hills, Pakistan

Mohammad Umar Farooq1*, Sarfaraz Ahmad2, Ghulam Nabi1, Ijaz Ali1 and Imtiaz Ahmad1

1National Agricultural Research Centre, Islamabad, Pakistan; 2Pakistan Agricultural Research Council, Islamabad, Pakistan.

ABSTRACT

Carbon sequestration study was conducted in grazed and in un-grazed sites at Pabbi hills Kharian, District Gujarat, Pakistan. The study area was surveyed and homogeneous sites for conducting experiment were selected for grazed and un- grazed range land at Pabbi hills Kharian, District Gujarat, Pakistan. Carbon is played a vital role in the green house gases. Carbon sequestration during the photosynthesis process via plant biomass is the extent of this atmospheric gas. An experiment the data for above and below phytomass for grazed and un- grazed range land was collected and carbon pool was estimated by Wet Combustion and Dry Combustion method.Four transect lines were drawn in each experimental plot. Twenty four samples of each experimental plot were collected with the help of ADC one m 2 quadrate methods, weighed and then oven dried at 60 oC to find out the dry weight for above pytomass carbon Mg C ha-1 (Brown and Lugo, 1982). Similarly, the same 1 m2 quadrate area was dug up to the depth of root zone for each grass and the root portion was separated, weighed, oven dried at 60 Co for estimating below ground pytomass carbon Mg C ha-1. Carbon pool in above ground phtyomass was 0.08 MgCha-1 while below ground phytomass carbon was estimated as 0.05 MgCha-. In grazed and un-grazed sites, the SOC (%) MgCha-1 decreased depth wise as well as in total carbon MgCha-1. In grazed site, the carbon decreased due to their shallow roots habit and also least portion of phytomass was left behind on the soil surface. Therefore, maximum carbon was leached down into soil. Similarly in un-grazed site, as their above portion of grass was not so grazed, but the carbon was leached into soil due to their shallow roots all the carbon leached down into soil. The carbon sequestration in underground and the aerial phytomass depends upon the management practices, climate and response of different species.
 

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Pakistan Journal of Agricultural Research

September

Vol. 30, Iss. 3, Pages 209-309

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