Nitrogen fixation capacity of Azotobacter spp. strains.
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Research on Azotobacter chroococcum spp. in crop production has manifested its significance in plant nutrition and its contribution to soil fertility. The possibility of using Azotobacter chroococcum in research experiments as microbial inoculant through production of growth substances and their effects on the plant has markedly enhanced crop production in agriculture.
Azotobacter vinelandii and Azotobacter beijerinckii related to effects produced on tomato plants. Pl. Soil. 43: 609-19. Bahadur A, Sigh J, Upadhya A K and Singh K P (2003) Effect of organic manures and biofertilizers on growth, yield and quality attributes of Broccoli ( Brassica oleracea L Var italica plenck ) Veg. Sci. 30(2): 192-94.
Azotobacter in soil: The presence of Azotobacter sp. in soils has beneficial effects on plants, but the abundance of these bacteria is related to many factors, soil physico-chemical (e.g. organic matter, pH, temperature, soil moisture) and microbiological properties. 10 Its abundance varies as per the depth of the soil profile. 11-15 Azotobacteria are much more abundant in the rhizosphere of.
Government research institute, the Malaysian Rubber Board (MRB) had been conducting research on Rhizobium inoculums for leguminous cover crops in the inter rows of young rubber trees in the large plantations. Besides, University Putra Malaysia (UPM) also has conducted many researches since 1980’s on Mycorrhiza and initiated the research to.
PGPB such as Azospirillum sp., Azotobacter sp., Pseudomonas sp., Bacillus sp. and Acinetobacter sp. In general, the population density of Azotobacter sp. was 3-4 times higher than control in all PVP formulations (Fig 1). Application of PEG 400 did not influence population density of Azotobacter sp. irrespective of its concentration. Further.
Azotobacter. on plant growth and yield has been discribed. Azotobacter. density in soil positively correlate with total N. Azotobacter. grow in rhizosphere improve plant growth by exerting beneficial effects through nitrogen (N. 2) fixation (14) and phytohormone synthesis 5). The (1 significant role of. Trichoderma. as biological control of plant.