Author(s):

Uthappa AR and Devakumar AS

Abstract: The study was conducted in different land use systems viz., tree plantations (Tectona grandis, Terminalia bellirica, Swietenia macrophylla, Artocarpus hirsutus), natural forest, horticulture (Mangifera indica) and agroforestry (Melia dubia) at University of Agricultural Sciences, GKVK, Bengaluru, Karnataka. The CO₂ sequestered in tree biomass was recorded highest under A. hirsutus (3182.03 Mg/ ha) followed by T. bellirica (1519.66 Mg/ ha), whereas the lowest CO₂ was sequestered under horticulture system (127.65 Mg /ha) followed by agroforestry (196.47 Mg/ha). Highest SOC (Mg/ha) was recorded under natural forest (25.59 Mg/ha) followed by S. macrophylla (17.44 Mg/ha) and it is lowest under horticulture (10.59 Mg/ha). The litter carbon was highest under A. hirsutus (3.87 Mg/ha/year) and lowest under T. grandis (1.16 Mg/ha/year). The highest CO₂ was sequestered under A. hirsutus (3321.44 Mg ha^-1) followed by T. bellirica (160.80 Mg ha^-1) and least under horticulture system (469.36 Mg ha^-1). The variation in carbon sequestration potential among the land use systems was mainly due to species, spacing and age of the trees.

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