Pedosphere 11(4): 327--332, 2001
ISSN 1002-0160/CN 32-1315/P
©2001 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Synergism among VA mycorrhiza, phosphate solubilizing bacteria and Rhizobium for symbiosis with blackgram (Vigna mungo L.) under field conditions |
| A. TOMAR, N. KUMAR, R. P. PAREEK and A. K. CHAUBE |
| Department of Soil Science, College of Agriculture, G. B. Pant University of Agriculture and Technology, Pantnagar-263145 (India) |
| ABSTRACT |
| A field experiment was conducted at the G.B. Pant University Research Station, Ujhani (U.P.) in rainy (Kharif) season of the year 1994-1995 to study the effect of Rhizobium, VAM (vesicular arbuscular mycorrhiza) and PSB (phosphate solubilizing bacteria) inoculation, with and without P, on blackgram (Vigna mango L.) seed yield. Phosphorus application in soil with medium P content (5.4 mg kg1) increased nodulation, grain yield, N and P in plant and grain over no phosphorus control. Forty kilograms of Pz05 each hactare recorded an increase of 20.6%in nodule dry weight, significant increases of 0.35 g kg-1 in N concentration and 1.28 g kg-1 in P concentration of plant over 20 kg P2O5 ha-1. Similar significant increases of 0.59 g kg-1 in grain yield and 0.54 and 0.23 g kg-1 in N and P concentrations of the grain, respectively, over 20 kg P2O5 ha-1 were also obtained with higher dose. Inoculation of Rhizobium + VAM + PSB at all the stages of plant growth recorded maximum increases in all the parameters studied. Dual inoculation of Rhizobium with either VAM or PSB was generally significant in the effect and better than that of VAM + PSB, however, P accumulation in plant and grain was more with VAM + PSB. Among single inoculadons, Rhizobium gave highest and 21.0% more nodule number, 34.7% more nodule dry mass, 0.73 g kg-1 more N in grain and 4.2% higher grain yield over PSB. PSB, however, registered significant increases in P concentration in plant and grain over VAM and Rhizobium. |
| Key Words: phosphorus, PSB, Rhibozium, synergism, VAM |
| Citation: Tomar, A., Kumar, N., Pareek, R. P. and Chaube, A. K. 2001. Synergism among VA mycorrhiza, phosphate solubilizing bacteria and Rhizobium for symbiosis with blackgram (Vigna mungo L.) under field conditions. Pedosphere. 11(4): 327-332. |
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