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SUITABILITY OF EXTRACTANTS, DETERMINATION OF CRITICAL LIMIT OF NICKEL AND ITS RESPONSE TO BARLEY (Hordeum vulgare L.) GROWN IN INCEPTISOLS OF VARANASI

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Title SUITABILITY OF EXTRACTANTS, DETERMINATION OF CRITICAL LIMIT OF NICKEL AND ITS RESPONSE TO BARLEY (Hordeum vulgare L.) GROWN IN INCEPTISOLS OF VARANASI
 
Creator Omkar Kumar
 
Contributor Prof. Satish Kumar Singh
 
Subject Barley, extractants, determination, critical limit, nickel and its response
 
Description Ph. D. Thesis, Soil Science and Agricultural Chemistry
The present study entitled “Suitability of extractants, determination of critical limit of nickel and its response to barley (Hordeum vulgare L.) grown in Inceptisols of Varanasi” was carried out with three pot and one field experiment during winter season of the year 2012-15 in the net house of the department of Soil Science and Agriculture Chemistry and Agricultural Research Farm, Banaras Hindu University, Varanasi. For assessing the critical limit, three type of bulk soils (low, medium and high in Ni content) were collected from 21 locations of Varanasi district. A low Ni containing soil was collected in bulk from Agricultural Research Farm of University to investigate the response of barley to soil and foliar application of Ni. All experiments were repeated during succeeding winter season except experiment for critical limit. The growth parameters like plant height, number of tillers, leaf chlorophyll content, number of grains per ear, 1000 grain weight, grain yield, straw yield, and harvest index were recorded. The soil and plant samples were collected as per plan mentioned in technical programme. On the basis of the study conducted, it may be concluded that in net house study, grain and straw yield of barley was increased up to application of 10 mg Ni kg-1 soil beyond that it was decreased. The foliar application of 0.2 % of Ni produced highest grain and straw yield of barley and at higher concentrations of Ni spray a significant reduction in yield was noticed. The intensity of chlorosis was increased with increasing levels of Ni spray. Under field condition, maximum straw and grain yield were recorded with soil application of 5 kg Ni along with 0.2% foliar application of Ni. The results indicated that foliar application of 0.2% Ni was statistically at par with application of 5 kg Ni along with 0.2% foliar spray of Ni. However, foliar application of 0.2% NiSO4.7H2O is recommended for barley (Exp. IV). The critical level of Ni in soils, was found to vary with different extractants. The maximum values of critical limit was revealed with 0.01M EDTA-0.1M (NH4)2CO3 (0.29 and 0.32 mg kg-1 in graphical and statistical method, respectively) followed by 0.005M DTPA-CaC12 (0.22), 0.3N NH4-oxalate (0.19), 1N Mg (NO3)2 (0.11) and 1N NH4OAc (0.08) with both graphical and statistical procedures. However, keeping in fact the ease of extraction highest correlation and multinutrients extraction nature, 0.005M DTPA- CaCl2 is recommended as the best extractant for Ineptisols of Varanasi. The critical limit of Ni in barley shoot was found to be 2.40 and 2.14 mg kg-1 in graphical and statistical procedures, respectively.
 
Date 2017-01-19T17:53:59Z
2017-01-19T17:53:59Z
2017
 
Type Thesis
 
Identifier Kumar, O. 2017. Suitability of extractants, determination of critical limit of nickel and its response to barley (Hordeum vulgare L.) grown in Inceptisols of Varanasi. Ph. D. Thesis, Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences, BHU, Varanasi.
http://krishikosh.egranth.ac.in/handle/1/97205
 
Language en
 
Relation P0155;
 
Publisher Institute of Agricultural Sciences, Banaras Hindu University, Varanasi