Vol. 7, Issue 1 (2019)
Soil organic carbon pools under different land use and management practices in swell-shrik soils
Author(s): Damare AD, Dr. Kharche VK and Padghan AD
Abstract: The present investigation was carried out to assess the soil organic carbon pools under different land use management systems in swell-shrink soils. The objective was to study soil organic carbon pools, physical and chemical properties under different land use and management practices in swell-shrink soils. Seven different land use and management systems were selected on the research farm of the Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. The results revealed that the physical properties like bulk density were improved under the long term use of FYM integrated with fertilizers. Sorghum-wheat cropping system recorded highest amount of available nutrients including nitrogen, phosphorus, potassium and sulphur and micro nutrients in addition to highest amount of organic carbon. This was largely due to higher biomass addition to the soil under these systems. The highest soil organic carbon stock was recorded under long term fertilizer experiment (22.80 Mg ha-1) followed by cotton based cropping system (18.46 Mg ha-1). The continuous integrated use of organics and crop residues with fertilizers recorded increase in soil carbon stocks also with the soil attributes indicating more carbon sequestration for soil health sustenance. The total soil organic carbon (TOC) content varied from 4.32 to 8.64 g kg-1 and the soils under sorghum-wheat cropping system recorded highest TOC (6.84 g kg-1). The very labile carbon (fraction 1:CVL) varied from 0.73 to 1.28 g kg-1 under different land use and management systems which constitute 14.81 to 19.45 percent of total organic carbon. The non-labile carbon (fraction 4: CNL) varied from 2.81 to 5.85 g kg-1 which constitute 61.87 to 67.70 percent forms the largest contribution in the total soil organic carbon. The labile carbon (fraction 2: CL) ranged from 0.51 to 1.04 g kg-1 under different land use and management systems and contributed 10.63 to 14.16 percent of the total organic carbon. The active pool (CVL+CL) ranged between 26.84 to 31.66 percent and the passive pool (CLL+CNL) between 68.32 to 73.13 percent of total organic carbon under various land use systems. It can thus be concluded that the soil organic carbon pools were significantly influenced under various land use and management practices and active pool contributed 29.16%, while the passive carbon pool (70.76%) contributed significantly higher proportion. The abundance of four soil organic carbon fractions was in order non-labile carbon (64.41) > very labile carbon (16.91%) > labile carbon (12.30%) > less labile carbon (6.35%).
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Fig. 1: Very labile pool under various land use and management practices
Fig. 2: Labile pool under various land use and management practice
Fig. 3: Less labile pool under various land use and management practices
Pages: 1464-1467 | 530 Views 127 Downloads
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How to cite this article:
Damare AD, Dr. Kharche VK, Padghan AD. Soil organic carbon pools under different land use and management practices in swell-shrik soils. Int J Chem Stud 2019;7(1):1464-1467.
