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Phosphatase activity in the rhizosphere and its relation to the depletion of soil organic phosphorus

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Title Phosphatase activity in the rhizosphere and its relation to the depletion of soil organic phosphorus
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Creator J. C. Tarafdar
A. Jungk
 
Subject Phosphatase activity
Rhizosphere
Depletion of soil
 
Description Not Available
The distribution of phosphatase activity and of phosphate fractions of the soil in the proximity of roots was studied in order to evaluate the significance of phosphatases in P nutrition of various plants (Brassica oleracea, Allium cepa, Triticum aestivum, Trifolium alexandrinum). A considerable increase in both acid and alkaline phosphatase activity in all the four soil-root interfaces was observed. Maximum distances from the root surface at which activity increases were observed ranged from 2.0 mm to 3.1 mm for acid phosphatase and from 1.2 mm to 1.6 mm for alkaline phosphatase. The increase in phosphatase activity depended upon plant age, plant species and soil type. A significant correlation was noticed between the depletion of organic P and phosphatase activity in the rhizosphere soil of wheat (r = 0.99 * * ) and clover (r = 0.97 * * ). The maximum organic P depletion was 65% in clover and 86% in wheat, which was observed within a distance from the root of 0.8 mm in clover and 1.5 mm in wheat. Both the phosphatases in combination appear to be responsible for the depletion of organic P.
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Date 2020-12-30T10:42:35Z
2020-12-30T10:42:35Z
1987-01-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/44280
 
Language English
 
Relation Not Available;
 
Publisher Not Available