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PHOSPHORUS USE EFFICIENCY OF CROP SPECIES IN ACIDIC SOILS OF CHANDAULI DISTRICT

KrishiKosh

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Title PHOSPHORUS USE EFFICIENCY OF CROP SPECIES IN ACIDIC SOILS OF CHANDAULI DISTRICT
 
Creator Avinash Kumar Rai
 
Contributor Dr. Amitava Rakshit
 
Subject Phosphorus use efficiency, crop species, acidic soils, wheat, maize and pea
 
Description Ph. D.
The present investigation was undertaken with an objective to characterise the different forms of acidity in relation to physicochemical properties, investigate phosphorus use efficiency in wheat, maize and pea with reference to different plant properties. A mechanistic model was evaluated for simulation of P influx in to root at different P levels and sensitivity analysis was performed to access the influence of morphological, physiological and soil parameters. The aim of the present experiment therefore has been to investigate the reasons for such differences among the crops, and find out if the same can be explained by the behavior of root hairs and/or by knowing the ability of plants to associate with AM. In order to find out the answer, laboratory analysis and pot experiments were conducted with wheat, maize and pea during November 2011 to May 2013 and the results are described in the following sections.
Benomyl application had almost no effect on shoot P concentration for the three crops throughout the growing season. There was slight though nonsignificant decrease of shoot P concentration in the plots treated with benomyl. Benomyl application had almost no effect on P concentration in the shoot and P uptake was closely related to dry matter production. A significantly higher P influx was recorded in untreated benomyl pot than benomyl treated pot. Effect of benomyl application on P influx was more during early and middle growth stages of maize. In case of pea, benomyl had significant effect only at first harvest interval. The higher measured than calculated influx indicates that plants posses mechanisms that enhance P transport to the root above that allowed for by the bulk soil. Possible reasons for this enhanced transport may be through root exudates that increase P solubility in the rhizosphere or mycorrhiza symbiosis. From the present experiment it can be inferred that the higher measured influx compared to calculated P influx of wheat, maize and pea could partly be explained by mass flow, diffusion and mycorrhiza. Possible reasons for this enhanced transport (chemical mobilization) may be through root exudates that increase P solubility in the rhizosphere.
 
Date 2016-09-21T19:55:54Z
2016-09-21T19:55:54Z
2016
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/78241
 
Language en
 
Relation P0043;
 
Format application/pdf
 
Publisher Institute of Agricultural Sciences, Banaras Hindu University