EFFECT OF DUAL BIOFERTILIZATION, BIOGAS MANURE AND MINERAL FERTILIZER ON GUAR PLANTS [Cyamopsis tetragonoloba (L.) TAUB.] | ||
| Journal of Agricultural Chemistry and Biotechnology | ||
| Article 5, Volume 25, Issue 10, October 2000, Pages 6481-6492 PDF (499.26 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jacb.2000.259826 | ||
| Author | ||
| T. A. Tewfike, | ||
| Agriculture Botany Department (Agriculture Microbiology), Faculty of Agriculture, Moshtohor, Benha Branch, Zagazig University, Egypt. | ||
| Abstract | ||
| Two field experiments were conducted in June 1997 and 1998 to study the effect of dual inoculation with Rhizobium as symbiotic N2-fixer and Azospirillum lipoferum as asymbiotic N2-fixer, biogas manure and mineral fertilizer on nodulation, N2-ase activity and yield of guar plants [Cyamopsis tetragonoloba ( L.) Taub.] Investigation results showed that, guar seeds application with dual inoculation of Rhizobium and Azospirillum lipoferum and provided with half dose of biogas manure (20 kg N/fed), gave the highest values of bacterial densities in soil rhizosphere, CO2 evolution, N2-ase activity, nodulation and guar seed contents of total carbohydrates and guar gum. Dual inoculation combined with half dose of inorganic nitrogen or half dose of organic nitrogen (20 kg N/fed) increased all values than combination with full dose (40 kg N/fed) of each inorganic nitrogen or organic nitrogen fertilizers. Also, individual Rhizobium inoculation supplied with 40 kg N/fed organic nitrogen or inorganic nitrogen increased the values of all treatments than individual inoculation with dual inoculation received the full dose of organic or inorganic nitrogen. | ||
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