Effect of Cropping Systems on Soil Physical Properties and Carbon Sequestration Potential in Mid-hills of Jammu.
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Date
2021-01
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Sher-e-Kashmir University of Agricultural Sciences and Technology Jammu, J&K
Abstract
An understanding of the effect of cropping systems on soil physical properties and soil carbon sequestration is of paramount importance for framing strategies for soil quality management in the present context of increasing atmospheric CO2 concentration. A study was thus conducted in Mid-hills of Jammu (i) to assess the effect of cropping systems on physical properties of the soil. (ii) to assess the effect of cropping systems on carbon sequestration of soil (iii) to find relationship between physical properties of soil and carbon sequestration. Four cropping systems, namely agroforestry, cereal, horticulture and vegetable were considered for the study. The soil carbon sequestered in 0.5-m soil depth was determined under different cropping systems. Agroforestry based cropping system recorded maximum porosity (49.60 per cent), water holding capacity (42.54 per cent) and infiltration rate (5.93 cm hr-1). While, bulk density (1.29 g cm-3) and penetration resistance (0.17 MPa) were recorded lowest in agroforestry and highest in cereal-based cropping system. The mean weight diameter of surface soils was highest for agroforestry (2.17mm) and was lowest for cereal (1.22 mm) based cropping system. Water-stable macro-aggregates (>0.25mm) were abundant in agroforestry (84.83 per cent) while, water stable micro-aggregates (<0.25mm) were abundant (70.01 per cent) in cereal-based cropping system. The total carbon sequestered in 0.5-m profile was highest in agroforestry (102.8 Mg ha-1) and lowest in cereal (77.4 Mg ha-1) based cropping systems. Surface layer recorded highest carbon sequestered in agroforestry (32.9 Mg ha-1) and lowest in vegetable (28.3 Mg ha-1) based cropping systems. Sub-surface layers recorded highest carbon sequestered in agroforestry and lowest in cereal based cropping system. Carbon sequestration in the surface layer was negatively correlated with bulk density, penetration resistance and water stable micro-aggregates. However, it was positively correlated with porosity (r = .868**), water holding capacity (r = .736**), infiltration rate (r = .863**), mean weight diameter (r = .624**) and water stable macro-aggregates (r = .683**).
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Preferred for your work. Effect of Cropping Systems on Soil Physical Properties and Carbon Sequestration Potential in Mid-Hills of Jammu, Division of Soil Science and Agriculture Chemistry (2020).