Saha, Supradip and Mina, Banshi L and gopinath, K.A. and Kundu, Samresh and Gupta, H S (2007) Relative changes in phosphatase activities as influenced by source and application rate of organic composts in field crops. Bioresource Technology, 99 (6). pp. 1750-1757.
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Potential impact of different levels and sources of organic composts on activities of phosphatases (acid and alkaline phosphatase, phosphodiesterase, and inorganic pyrophosphatase) was studied after three years of continuous application. Enzyme activities were compared with microbial biomass P and available P. Experimental plots were divided based on the organic source into three groups: those receiving farmyard manure (FYM), vermicompost (VC) and Lantana compost (LC). Microbial biomass P (11.7 g kg1 soil), available P (24.0 g kg1 soil) and acid phosphatase (1.3 mg g1 p-NP g1 soil h1) was highest in highest dose of VC. Acid phosphatase activity was high in all plots, including those where microbial biomass P levels were low. Most of the phosphatase activities were significantly correlated with available P in FYM and VC. These relationships were negative for LC treatments. Results showed that application of earthworm casts is helpful in faster transformation of organic P by facilitating better environment to microbes and plant roots. 2007 Elsevier Ltd. All rights reserved.
|Uncontrolled Keywords:||Phosphomonoesterases; Phosphodiesterase; Inorganic pyrophosphatase; Microbial biomass P; Organic composts|
|Subjects:||Agricultural Sciences and Technology > Agronomy|
|Deposited By:||Mr Rakeshwar Verma|
|Deposited On:||15 Jan 2011 09:52|
|Last Modified:||15 Jan 2011 09:52|
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