Soil Organic Carbon Status and Macronutrient Availability As Affected by Different Density Plantations of Bombax ceiba L. Based Agrisilvicultural System In Calcareous Soil
DOI:
https://doi.org/10.36808/if/2023/v149i1/166544Keywords:
Bombax ceiba, Available Macro Nutrients, Tree Densities, Soli Organic Carbon.Abstract
A field experiment was conducted to examine the effect of different spacings, i.e. 5 × 2 m, 5 × 3 m, 5 × 4 m and 5 × 5 m of six-year-old Bombax ceiba L. based agri-silvicultural system on soil organic carbon (SOC) stock and soil physico-chemical properties. The bulk density (BD), pH and electrical conductivity (EC) were significantly lower, while the SOC and soil available N, P2O5 and K2O were significantly higher under the agri-silvicultural systems as compared to open plot without trees. Significantly higher amounts of available macronutrients were also observed in surface soil (0 - 15 cm) than sub-surface (15-30 cm). There was 2.23 % reduction in soil pH in the highest density plantation (5 × 2 m) followed by 1.53 % (5 × 3 m) irrespective of the soil depth. Available N, P2O5 and K2O were highest in highest density plantation (5 ×2 m spacing) and increased by 15.0, 38.3 and 20.1 % in 0-15 cm soil depth, respectively. The total SOC storage from 0-30 cm soil depth in plantations of different density increased by 32.9 % in 5 × 5 m and 71.8 % in 5 × 2 m spacings. By and large it is concluded that higher density plantations (5 × 2 m and 5 × 3 m) of B. ceiba proved to be the best for improving SOC and soil available macronutrients.
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