Carbon Sequestration and Crop Productivity in Eucalyptus-Wheat Agroforestry System

Avinash Jain, Nidhi Mehta

Abstract


Allometric relationships between girth at breast height (GBH), height, age and carbon content in eucalyptus trees were established using100 trees of age varying from 0.5 to 24 years, height from 1.20 to 21.10m and GBH from 6.10 to 74.92cm. Regression equation with GBH i.e. y = 2.224 x – 35.80, r2 = 0.89 (p<0.01) was found to be the most practical and precise for determining the carbon content in eucalyptus trees. The equation was applied in Eucalyptus-Triticum aestivum (wheat) agroforestry system established at farmer's field in Jabalpur, M.P. (India). Determination of carbon stock potential of eucalyptus trees in wheat-based agroforestry and its relationship with the productivity of the crop revealed that carbon content in eucalyptus trees increased when cultivated with wheat in agroforestry system. Although, this upsurgegradually declined with age of the trees with maximum (32.64%) in 1.5 years to 0.38% in 4.5 years old trees. Simultaneously, economic yield and crop biomass of wheat crop also declined with increase in age of eucalyptus trees.

The results suggest that wheat can be cultivated with eucalyptus trees during initial two years of plantation to enhance carbon stock in trees without affecting crop productivity.


Keywords


Eucalyptus urograndis, allometric equation, agroforestry system, carbon sequestration, above ground biomass.

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