Long‐term impact of organic and inorganic fertilizers on soil organic carbon dynamics in a rice‐ wheat system

Bibliographic Data

ID21647541
AuthorsDebashis Dutta (0000-0002-5383-5795, ICAR—Indian Institute of Farming Systems Research Meerut India), Vinod K Singh (0000-0003-1208-4857, ICAR—Central Research Institute for Dryland Agriculture Hyderabad India, corresponding author), Pravin Kumar Upadhyay (0000-0002-5563-4276, ICAR—Indian Agricultural Research Institute New Delhi India, corresponding author), Amrit L Meena (0000-0002-3020-5141, ICAR—Indian Institute of Farming Systems Research Meerut India), Amit Kumar (0000-0003-4000-1780, ICAR—Indian Institute of Farming Systems Research Meerut India), Rajendra P Mishra (ICAR—Indian Institute of Farming Systems Research Meerut India), Brahma S Dwivedi (0000-0002-2922-795X, ICAR—National Bureau of Soil Survey and Land Use Planning Nagpur India, corresponding author), Arvind Kumar Shukla (0000-0001-7867-8717, ICAR—Indian Institute of Soil Science, Nabibagh Bhopal India), Gulab Singh Yadav (0000-0002-9607-2492, Indian Agricultural Research Institute), Rahas B Tewari (ICAR—Indian Institute of Farming Systems Research Meerut India), Vaibhav Kumar (0000-0002-0047-0681, ICAR—Indian Institute of Farming Systems Research Meerut India), Ankur Kumar (0009-0003-5783-5156, ICAR—Indian Institute of Farming Systems Research Meerut India), Azad Singh Panwar (Indian Council of Agricultural Research)
Year2022
Volume33
Issue11
Pages1862-1877
Publication date2022-07-15
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.4267
OpenAlexW4220972047
LanguageEN
Citations received1
References cited60

Deep soil carbon (C) plays an important role in the global carbon cycle because it is more recalcitrant and remains in the soil for a longer period. Yet, very few studies have reported the impact of long‐term fertilization on soil organic carbon (SOC) dynamics in deep soil in a rice‐wheat system (RWS). Hence, the objectives of this study were to evaluate the long‐term fertilization impact on carbon sequestration and C pools in RWS in the Indo‐Gangetic Plain (IGP) of India. Application of 90 kg N, 20 kg P and 25 kg K ha −1 through mineral fertilizers (NPK) + green gram incorporation (GR) + 30 kg N ha −1 through farmyard manure (FYM) sequestered more C (25.86 Mg ha −1 ) in the 0–105 cm soil depth compared with mineral fertilizer alone (1.25 Mg ha −1 ). The C‐sequestration rate ranged between 0.61 to 1.23 Mg C ha −1 yr −1 under treatments having organic fertilizer and mineral fertilizer, whereas it varied from 0.06 to 0.39 Mg C ha −1 yr −1 in the treatments receiving mineral fertilizer only. Total C and critical C input were 197 Mg kg −1 and 1.94 Mg C ha −1 yr −1 , respectively under NPK + GR + FYM treatment. Integrated application of mineral fertilizers and organics in treatments NPK + FYM, NPK + SPM (sulphitation press mud), NPK + GR, NPK + GR + FYM and NPK + CR (crop residue) resulted in higher sustainable yield index of RWS compared to mineral fertilizer alone. We conclude that application of organic material along with mineral fertilizers is essential to mitigate the atmospheric C load through C‐sequestration in deep soils and to attain sustainable RWS productivity in the IGP

Agronomy · Animal science · Biology · Carbon sequestration · Fertilizer · Human fertilization · Manure · Nitrogen · Soil carbon · Soil water · Total organic carbon · Chemistry · Environmental Science · Soil and Unsaturated Flow · Soil and Water Nutrient Dynamics · Soil Carbon and Nitrogen Dynamics · Environmental Chemistry · Soil Science

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