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Soil and water conservation measures improve soil carbon sequestration and soil quality under cashews

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Title Soil and water conservation measures improve soil carbon sequestration and soil quality under cashews
Not Available
 
Creator Mahajan GR
Das B
Manivannan S
Manjunath BL
Verma RR
Desai S
Kulkarni RM
Latare AM
Sale R
Murgaonkar D
Patel KP
Morajkar S
Desai A
Barnes N
 
Subject Land degradation
Microbial activity
Microbial biomass carbon
Minimum dataset
Soil erosion
Western Ghats
 
Description Not Available
Land degradation is becoming a serious problem in the west coast region of India where one of the
world's eight biodiversity hotspots, the ‘Western Ghats’, is present. Poor land management practices and
high rainfall have led to increasing problems associated with land degradation. A long-term (13-year)
experiment was done to evaluate the impact of soil and water conservation measures on soil carbon
sequestration and soil quality at three different depths under cashew nut cultivation on a 19% slope. Five
soil and water conservation measures - continuous contour trenches, staggered contour trenches, halfmoon terraces, semi-elliptical trenches, and graded trenches all with vegetative barriers of Stylosanthes scabra and Vetiveria zizanoides and control were evaluated for their influence on soil properties,
carbon sequestration, and soil quality under cashews. The soil and water conservation measures
improved significantly the soil organic carbon, soil organic carbon stock, carbon sequestration rate and
microbial activity compared to the control condition (without any measures). Among the measures
tested, continuous contour trenches with vegetative barriers outperformed the others with respect to
soil organic carbon stock, sequestration rate, and microbial activity. The lower metabolic quotient with
the measures compared to the control indicated alleviation of environmental stress on microbes. Using
principal component analysis and a correlation matrix, a minimum dataset was identified as the soil
available nitrogen, bulk density, basal soil respiration, soil pH, acid phosphatase activity, and soil available boron and these were the most important soil properties controlling the soil quality. Four soil
quality indices using two summation methods (additive and weighted) and two scoring methods (linear
and non-linear) were developed using the minimum dataset. A linear weighted soil quality index was
able to statistically differentiate the effect of soil and water conservation measures from that of the
control. The highest value of the soil quality index of 0.98 was achieved with continuous contour
trenches with a vegetative barrier. The results of the study indicate that soil and water conservation
measures for cashews are a potential strategy to improve the soil carbon sequestration and soil quality
along with improving crop productivity and reducing the erosion losses.
Indian Council of Agricultural Research
 
Date 2021-07-28T05:22:14Z
2021-07-28T05:22:14Z
2020-08-02
 
Type Journal
 
Identifier 5. Mahajan GR, Das B, Manivannan S, Manjunath BL, Verma RR, Desai S, Kulkarni RM, Latare AM, Sale R, Murgaonkar D, Patel KP, Morajkar S, Desai A, Barnes N (2020) Soil and water conservation measures improve soil carbon sequestration and soil quality under cashews. International Journal of Sediment Research. 36(2): 190-206. DOI: 10.1016/j.ijsrc.2020.07.009.
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/50427
 
Language English
 
Relation Not Available;
 
Publisher Not Available