Carbon fractions and productivity under changed climate scenario in soybeanawheat system

Global climate change is anticipated to have a tremendous influence on crop productivity and nutrient cycling in legume-based cropping systems. The effect of long-term application of manure and fertilizers on the dynamics of soil organic carbon (SOC) pools and soil physical properties was studied in...

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Bibliographic Details
Published in:Field crops research 2013-04, Vol.145, p.10-20
Main Authors: Manna, M C, Bhattacharyya, P, Adhya, T K, Singh, M, Wanjari, R H, Ramana, S, Tripathi, A K, Singh, K N, Reddy, K S, Rao, A, Sisodia, R S, Dongre, M, Jha, P, Neogi, S, Roy, K S, Rao, K S, Sawarkar, S D, Rao, V R
Format: Article
Language:English
Subjects:
Glycine max
Triticum aestivum
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Summary:Global climate change is anticipated to have a tremendous influence on crop productivity and nutrient cycling in legume-based cropping systems. The effect of long-term application of manure and fertilizers on the dynamics of soil organic carbon (SOC) pools and soil physical properties was studied in a soybean (Glycine max Merr. L)awheat (Triticum aestivum L.) system. The temperature sensitivity of C pools and the alterations in microbial composition were determined at 25, 35, and 45 degree C. Higher levels of microbial biomass C (MBC) and nitrogen (MBN), water soluble carbon (WSC), acid hydrolysable carbohydrates (AHC), particulate organic matter carbon (POMC) and nitrogen (POMN) were observed in the NPK + FYM at a depth of 0a15 cm. Irrespective of the treatment, micro aggregates (53a250 mu m) were a major aggregate size class, comprising 45a57% of the total soil aggregates, followed by macro aggregates (250a2000 mu m at 37.8a45%). Microbial respiration rate increased by 13.9% in most recalcitrant pools (
ISSN:0378-4290
DOI:10.1016/j.fcr.2013.02.004