科研之友
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摘要
Reducing carbon emissions from deforestation and degradation in developing countries is of the central importance in efforts to combat climate change. A study was conducted to measure carbon stocks in various land-use systems including forms and reliably estimates the impact of land use on carbon (C) stocks in the forest of Rajasthan, western India (23 degrees 3'-30 degrees 12'N longitude and 69 degrees 30'-78 degrees 17'E). 22.8% of India is forested and 0.04% is the deforestation rate of India. In Indian forest sector of western India of Aravally mountain range covered large area of deciduous forest and it's very helpful in carbon sequestration at global level. The carbon stocks of forest, plantation (reforestation) and agricultural land in aboveground, soil organic and fine root within forest were estimated through field data collection. Results revealed that the amount of total carbon stock of forests (533.64 +/- 37.54 Mg.ha(-1), simplified expression of Mg (carbon) .ha(-1)) was significantly greater (P<0.05) than the plantation (324.37 +/- 15.0 Mg.ha(-1)) and the agricultural land (120.50 +/- 2.17 Mg.ha(-1)). Soil organic carbon in the forests (172.84 +/- 3.78 Mg.ha(-1)) was also significantly greater (P<0.05) than the plantation (153.20 +/- 7.48 Mg.ha(-1)) and the agricultural land (108.71 +/- 1.68 Mg.ha(-1)). The differences in carbon stocks across land-use types are the primary consequence of variations in the vegetation biomass and the soil organic matter. Fine root carbon was a small fraction of carbon stocks in all land-use types. Most of the soil organic carbon and fine root carbon content was found in the upper 30-cm layer and decreased with soil depth. The aboveground carbon (ABGC): soil organic carbon (SOC): fine root carbon ratios (FRC), was 8:4:1, 4:5:1, and 3:37:1 for the forest, plantation and agricultural land, respectively. These results indicate that a relatively large proportion of the C loss is due to forest conversion to agricultural land.
- 出版日期2010-12
