Record Details

Optimization of Soil Organic Carbon through Particle Size Fractions and Cation Exchange Capacity in Humid Sub-Tropical Climate of Eastern India for Land Use Planning

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Optimization of Soil Organic Carbon through Particle Size Fractions and Cation Exchange Capacity in Humid Sub-Tropical Climate of Eastern India for Land Use Planning
 
Creator B.N. GHOSH, SILADITYA BANDYOPADHYAY, SUBRATA MUKHOPADHAYA, KRISHNENDU DAS, D.C. NAYAK AND S.K. SINGH
 
Subject SOC pools, CEC, soil particles, crop choice and LUP
 
Description Not Available
Critical value of soil organic carbon, a range of threshold to optimum is determined from the
relative yield/soil quality index with soil organic carbon (SOC) content of soils and affected by pedogenic
processes, land use and input management. But optimization of SOC is related to dominant clay minerals in
soils. Here, we attempted to determine the optimum soil organic carbon through CEC /particle (clay, silt)
ratios and SOC pool for land use planning. The study area comprised of Maynaguri block, Japaiguri
district, West Bengal, India (Agro-Ecological Sub-Region 15.3), where details soil survey had been conducted for soil resource mapping. Horizon wise soils sample were collected from fifteen modal soils profiles
upto a depth of 150 cm in seven established land management units (LMU) through soil survey database
representing Indo-Gangetic Alluvial plains soils at the Maynaguri block of Jalpaiguri district, West Bengal
having three land uses (field crops, forest and tea plantation). The SOC chemical pools of very labile (P1),
labile (P2), less labile ( P3) and non-labile (P4) in different LMUs varies from 24-34,14-20,19-24 and 26-
38 % of total soil organic carbon, respectively in the above root zone depth (ARZD) while it varies from 24-
31, 12-22, 20-22 and 26-34% of total soil organic carbon, respectively in the below root zone depth (BRZD)
following the order of P4>P1>P3>P2. The labile pool was highest (14.69 g kg-1
) in LMU1 having forest
land use and lowest (1.61 g kg-1
) in LMU3 in single cropping in the ARZD and the same trend followed at
BRZD. The recalcitrant pool is also highest (14.13 g kg-1
) in LMU1 and lowest (2.05 g kg-1
) in LMU3 but the
same trend did not follow in BRZD. The recalcitrant pool is also highest (14.13 g kg-1
) in LMU1 and lowest
(2.05 g kg-1
) in LMU3 but the same trend did not follow in BRZD. Relationship among the soil particles with
different C polls showed significant positive correlation with clay, fine silt, fine silt +clay and their ratios but
not significant with silt fraction indicating very initial soil aggregation process. It has been observed that the
CEC/clay+fine silt ratios (Illite dominant in clay fraction; Mica and Feldspars in fine silt fraction) showed
exponential relationship with labile (L) and recalcitrant (R) pools. The recalcitrant pool in BRZD, SOC
pools maxima and its derived priority class will guide selection of root zone depth basis crop suitability,
cropping intensity and input management practices for long-term soil carbon restorative land use plan
Not Available
 
Date 2020-07-01T05:56:46Z
2020-07-01T05:56:46Z
2019-06-27
 
Type Research Paper
 
Identifier Not Available
0255-7193
0255-7193
http://krishi.icar.gov.in/jspui/handle/123456789/37919
 
Language English
 
Relation Not Available;
 
Publisher Clay Research