Effect of phosphorus and zinc on nodulation and nitrogen fixation in chickpea (Cicer arietinum L.) |
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Authors: | U C Shukla O P Yadav |
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Institution: | (1) Department of Soil Science and Dean, Faculty of Agriculture, University of Maiduguri, Maiduguri, Nigeria;(2) Lecturer, Department of Soil Science respectively, University of Maiduguri, Maiduguri, Nigeria |
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Abstract: | A green house study was conducted on the effect of P and Zn on nodulation and N fixation in chickpea (Cicer arietinum L.) in a loamy sand (Typic Torripsamments) using treatment combinations of five levels of P (0, 25, 50, 100 and 250 ppm),
and six levels of Zn (0, 5, 10, 20, 40 and 100 ppm). The number, dry matter and leghaemoglobin content of nodules, and amount
of N fixed generally increased with Zn alone upto 19 ppm and P alone upto 50 ppm, and decreased with their higher levels.
Application of 25 to 50 ppm P and 5 to 10 ppm Zn counteracted to a greater extent the adverse effect of 40 and 100 ppm Zn,
and 250 ppm P, resp. Maximum nodulation and N fixation (91 to 145% over zero P and Zn, at maturity) was recorded with 25 to
50 ppm P applied along with 5 to 10 ppm Zn. At 64 days, depletion in soil-N was noted, particularly when P was applied, whereas
at maturity there was a gain in soil-N, ranging from 10.5 to 44.5 kg/2×106 kg soil depending upon P and Zn treatments. The increase in nodulation and N fixation with balanced P and Zn nutrition might
be attributed to an increase in leghaemoglobin, and K and Fe concentration in nodules, and increased plant growth, resulting
into enhanced activity of N fixing organisms. The results showed that balanced P and Zn nutrition is essential not only for
plant growth but also for maximum activity of Rhizobium for N fixation.
Work done at Harvana Agricultural University, Hissar, India. |
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Keywords: | Legume P− Zn interaction Plant nutrition Leghaemoglobin Nitrogen-fixation |
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