Summary
Three field experiments were conducted on ten cultivars of winterwheat and four cultivars of springwheat to estimate the growth promoting effect ofAzospirillum brasilense under varying nitrogen doses. Independent of cultivar selection or nitrogen dose a highly significant yield increase could be observed in winterwheat: strains S631 and SpBr14 increased the average grain yield with 9.14% and 14.82% respectively. When the yield components were studied a coinciding increase in ear density could be demonstrated of resp. 10.57% and 13.55%. Less significant results were obtained with springwheat although in one experiment strain SpBr14 significantly increased grain yield. As with winterwheat tillering of the plant was markedly affected by inoculation with both strains. In a companion greenhouse experiment it was found that inoculation with Azospirillum can cause a decrease in the root mass of wheatplants except when strain SpBr14 is used. Therefore it is suggested that the presence of a higher tillering together with an undisturbed nutrient uptake capacity can result in yield increases after inoculation withAzospirillum brasilense.
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References
Burris R H 1977 Overview of nitrogen fixation.In Genetic Engineering for Nitrogen Fixation. Ed. A. Hollaender, pp 9–18, Plenum, New York.
Burris R H, Okon Y and Albrecht S L 1978 Properties and reactions ofSpirillum lipoferum. In Environmental Role of Nitrogen fixing Bluegreen algae and Asymbiotic Bacteria. Ecol. Bull. Stockholm 26, 353–363.
Dobereiner J and Day J M 1976 Associative symbioses in tropical grasses: characterization of microorganisms and dinitrogen fixing sites.In Proceedings of the 1st international symposium on nitrogen fixation. Eds. W E Newton and C J Nyman, pp 518–538, Washington, State University, Pullman.
Dobereiner J and Baldani V L D 1981 Prospects for inoculation of grasses withAzospirillum sp.In Associative Dinitrogen Fixation. Eds. P Vose and A P Ruschel. CRC, West Palm Beach.
Kapulnik Y, Sarig S, Nur I, Okon Y, Kigel J and Henis Y 1981 Yield increases in summer cereal crops in Israeli fields inoculated with Azospirillum. Exp. Agric. 17, 179–187.
Kostychew S P, Sheloumova A M and Shulniga O G 1926 Issledovaniya po biodinamika pochv. Trudy Otd. Sel′.-khoz. Mikrobiol. gas. Inst. opyt. Agron. 5–46.
Mishustin E N 1970 The importance of non-symbiotic nitrogen-fixing micro-organisms in agriculture. Plant and Soil 32, 545–554.
Smith R L, Schank S C, Bouton J H and Quesenberry K H 1978 Yield increase of tropical grasses after inoculation withSpirillum lipoferum. In Environmental Role of Nitrogen-fixing Blue-green algae and Asymbiotic bacteria, Ecol. Bull. Stockholm 26, 380–385.
Subba Rao N S 1980 Crop response to microbial inoculation.In Recent Advances in Biological Nitrogen Fixation. Ed. N S Subba Rao, pp 406–420, Edward Arnold, London.
Vlassak K and Reynders L 1979 Factors affecting biological dinitrogen fixation by associative symbiosis in temperate regions.In Isotopes and Radiation in Research on Soil-Plant Relationships, Ed. L A Self, pp 137–147, IAEA, Vienna.
Vlassak K and Reynders L 1981 Agronomic aspects of biological dinitrogen fixation byAzospirillum spp. in temperate region.In Associative Dinitrogen Fixation. Eds. P Vose and A P Ruschel, CRC, West Palm Beach.
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Reynders, L., Vlassak, K. Use ofAzospirillum brasilense as biofertilizer in intensive wheat cropping. Plant Soil 66, 217–223 (1982). https://doi.org/10.1007/BF02183980
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DOI: https://doi.org/10.1007/BF02183980