Soil organic carbon dynamics and crop yields of maize (Zea mays)–black gram (Vigna mungo) rotation-based long term manurial experimental system in semi-arid Vertisols of western India

Achieving sustainable crop productivity and maintenance of concurrent soil organic carbon (SOC) at desired levels in cereal-based cropping systems in relatively, poorly fertile Vertisols in semi-arid rainfed ecosystem is challenging task for dryland researchers. Different soil fertilization practice...

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Bibliographic Details
Published in:Tropical ecology 2019-09, Vol.60 (3), p.433-446
Main Authors: Srinivasarao, Ch, Kundu, Sumanta, Kumpawat, B. S., Kothari, A. K., Sodani, S. N., Sharma, S. K., Abrol, Vikas, Ravindra Chary, G., Thakur, Pravin B., Yashavanth, B. S.
Format: Article
Language:English
Subjects:
Arid lands
Arid zones
Aridity
Biodiversity
Biomedical and Life Sciences
Carbon
Cereal crops
Composting
Composts
Conservation Biology/Ecology
Corn
Crop production
Crop residues
Crop yield
Cropping systems
Crops
Depletion
Ecology
Ecosystems
Fertilization
Fertilizers
Landscape Ecology
Leaves
Life Sciences
Mineral fertilizers
Nitrates
Organic carbon
Organic soils
Ponds
Research Article
Residues
Soil dynamics
Soil fertility
Soil profiles
Soil properties
Soils
Sustainable yield
Urea
Vertisols
Vigna mungo
Zea mays
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Summary:Achieving sustainable crop productivity and maintenance of concurrent soil organic carbon (SOC) at desired levels in cereal-based cropping systems in relatively, poorly fertile Vertisols in semi-arid rainfed ecosystem is challenging task for dryland researchers. Different soil fertilization practices can contribute to carbon (C) sequestration, which requires a detailed knowledge of SOC dynamics in soil profile (0–1.0 m). We conducted a field experiment for 6 years to study the effect of applying mineral fertilizers and organic amendments (FYM, compost, green leaf and crop residue) on profile SOC stocks, C sequestration, SOC sequestration rate, C buildup rate and sustainable yield index (SYI) of maize and blackgram crops in dry semi-arid Vertisols of western India. The study encompasses different nutrient management viz., 100% recommended dose of fertilizer (RDF) of NP, 25 kg ha −1  N (FYM) + 25 kg N (Urea) + 30 kg P ha −1 , 25 kg ha −1  N (Compost) + 25 kg N (Urea) + 30 kg P ha −1 , 25 kg ha −1  N (Crop residue) + 25 kg N (Urea) + 30 kg P ha −1 , 15 kg ha −1  N (FYM) + 10 kg N (Crop Residue) + 25 kg N (Urea) + 30 kg P ha −1 , 15 kg ha −1  N (FYM) + 10 kg N (Compost) + 25 kg N (Urea) + 30 kg P ha −1 , 15 kg ha −1  N (FYM) + 10 kg N (Green Leaf) + 25 kg N (Urea) + 30 kg P ha −1 , 100% recommended N (urea) without P and unfertilized control. Randomized Complete Block design was used wherein all the treatments were replicated thrice. Application of 15 kg ha −1  N (FYM) + 10 kg N (Crop Residue) + 25 kg N (Urea) + 30 kg P ha −1 significantly improved the SOC concentration of the soil profile (0–1.0 m) than unfertilized control and treatments receiving solely mineral fertilizers. Highest SOC profile stock, C sequestration with concomitant C buildup was obtained with 15 kg ha −1  N (FYM) + 10 kg N (Crop Residue) + 25 kg N (Urea) + 30 kg P ha −1 . A positive correlation is observed between total C input and profile mean SOC content (R 2  = 0.74), profile C stock (R 2  = 0.76), C sequestration (R 2  = 0.76), C sequestration rate (R 2  = 0.76) at P values
ISSN:0564-3295
2661-8982
DOI:10.1007/s42965-019-00044-x