Title: Long term effect of nutrient management on soil quality and sustainable productivity under sorghum-wheat crop sequence in Vertisol of Akola, Maharashtra.
Abstract: A long term experiment was conducted with the objective of assessing the impact of continuous application of chemical fertilizers and manures on properties of soil, key indicators of soil quality and yield sustain ability under sorghum (Sorghum vulgare) - wheat (Triticum aestivum) cropping sequence, The experiment was con ducted in randomized block design since 1988 on Vertisols at the same site and with the same randomization at AkoJa in Central India as one of the centres of AICRP on Long Term Fertilizer Experiment. The treatments comprised of differential fertilizer levels of NPK, sulphur free and 37.5 kg sulphur ha- I with RDF, 2.5 kg zinc ha- l with RDF, only recommended nitrogen and nitrogen and phosphorus, farmyard manure @ lOt ha- I to sorghum crop only singly and in combination with 100% NPK to sorghum and only 100% NPK to wheat crop. The long term yield data from 1988 to 2007 of both the crops was used to study sustainability yield index which were found to be relatively higher in super optimal fertilizer dose (0.436) followed by 100% RDF + FYM (0.432) and 100% RDF + sulphur (0.421). Howev.er, the highest soil quality index was observed under integrated nutrient management comprising of 100% NPK + FYM (2.45), fol lowed by only FYM (2.16) and 150% NPK ofRDF (2.15) while the lowest was in the control (1.14) followed by 50% NPK of RDF (1.45) indicating considerable enhance ment in soil quality due to integrated nutrient management. Among the various treat ments' 100% RDF + FYM not only had the highest soil quality index but it was found as the most promising approach from the view point of yield sustainability, maintaining higher average yields under sorghum - wheat cropping sequence.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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Cited By Count: 14
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