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International Journal of Applied Agricultural & Horticultural Sciences
  • 28 March, 2024
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Frequency : Bimonthly
Language : English
DOI Prefix : 10.37322
P-ISSN : 0974-0775
E-ISSN : 2582-4198
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Vol. 8 (3) : May-June 2017 issue
Green Farming Vol. 8 (3) : 607-611 ; May-June, 2017
Long-term effect of chemical fertilizers and amendments on Carbon management index (CMI) under maize-wheat cropping system in an acid Alfisol
DHARMENDRA SINGH1*, R.P. SHARMA2, N.K. SANKHYAN3 and IBAJANAI KURBAH4
Department of Soil Science, College of Agriculture, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062 (Himachal Pradesh)
Designation :  
1Ph.D. Scholar *(dshekhawat960@gmail.com), 2Sr. Scientist, 3Sr. Scientist, 4Ph.D. Scholar
Subject : Soil Science & Agric. Chemistry; Soil Health & Soil Conservation Engg.
Paper No. : P-5968
Total Pages : 5
Received : 03 October 2016
Revised accepted : 24 January 2017
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Citation :

DHARMENDRA SINGH, R.P. SHARMA, N.K. SANKHYAN and IBAJANAI KURBAH. 2017. Long-term effect of chemical fertilizers and amendments on Carbon management index (CMI) under maize-wheat cropping system in an acid Alfisol. Green Farming Vol. 8 (3) : 607-611 ; May-June, 2017

ABSTRACT
The effect of chemical fertilizers and amendments on total organic carbon (CT) labile carbon (CL) and the role of carbon management index (CMI) in soil quality evaluation were studied under a maize-wheat cropping system in an acid Alfisol. The experiment included eleven treatments: 50% NPK (T1), 100% NPK (T2), 150% NPK (T3), 100% NPK + hand weeding (T4), 100% NPK + Zinc (T5), 100% NP (T6), 100% N (T7), 100% NPK + FYM @ 10 t ha-1 to maize only (T8), 100% NPK without S (T9), 100% NPK + lime (T10) and Control (T11). Significant build-up in soil fertility in terms of CT, and CL were maintained under integrated nutrient management involving FYM and NPK than unfertilized control plot in 0-15 and 15-30 cm soil depths. The highest values of CT (31.80 g kg-1), CL (1.99 g kg-1) and CMI (194) were found in T8. The magnitude of change in soil carbon fraction in sub-surface soil was low as compared to the surface soil. The application of 100% NPK (T2) and 100% NPK + FYM (T8) significantly increased the labile as compared to the control, whereas bulk density of soil was significantly reduced in T2 over the control. Balanced application of NPK (T2) showed significantly higher CMI over the control in surface soils. Application of graded doses of NPK from 50 to 150% of recommendation NPK significantly enhanced CT, CL and CMI in both surface and sub-surface soil depths. The CMI was found to be a useful index to assess the changes of soil quality induced by soil management practices due to its significant correlation with soil bulk density and C fractions.
Key words :
Carbon management index, Farmyard manure, Labile carbon, Total organic carbon.