Full TGIF Record # 79460
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Publication Type:
i
Report
Author(s):Mitra, S.; Rogers, M.; Pedersen, E.; Camyon, S.; Turner, J.
Author Affiliation:Eco Soil Systems, Inc., San Diego, CA
Title:Effect of Azospirillum brasilense and a microbial stimulant on the root development of cool-season turfgrasses
Section:New herbicides, new plant growth regulators and new uses
Other records with the "New herbicides, new plant growth regulators and new uses" Section
Meeting Info.:Brighton, UK: November 12-15, 2001
Source:British Crop Protection Council Conference Proceedings- Weeds 2001. Vol. 1, 2001, p. 15-22.
Publishing Information:Farnham, Surrey, England: British Crop Protection Council
# of Pages:8
Keywords:TIC Keywords: Azospirillum brasilense; Root growth; Application rates; Application frequency; Agrostis stolonifera; Root weight; Lolium perenne; Stimulants; Soil microorganisms
Abstract/Contents:"The bacterium Azospirillum has been reported to enhance root development of grasses. Experiments were conducted in the field and growth chamber in 1999, 2000 and 2001 to evaluate application rates, frequency and detect colonization levels in the roots of cool-season grasses. The rate trials with creeping bentgrass indicated that the optimum rate of Azospirillum was 4.68 litres/ha when applied with 11.7 litres/ha of the microbial stimulant. Application of Azospirillum and the microbial stimulant every seven days resulted in a 60% increase in dry root biomass, compared to the untreated check. There was no statistical difference in root biomass between the combination treatment (Azospirillum and the microbial stimulant) applied at an interval of every 7 or 14 days. A single inoculation of Azospirillum (4.2 x 107 cfu/ml) led to root colonization of both perennial ryegrass and creeping bentgrass. The level of Azospirillum colonization on the roots of perennial ryegrass was higher (3.8 x 106 cfu/g, 7 days after inoculation) than those of creeping bentgrass (1.1 x 104 cfu/g, 7 days after inoculation). At the 11.7 litres/ha rate of the microbial stimulant, the optimum concentration of Azospirillum was 1.0 x 105 cfu/m2, which translates to 1 x 107 cfu/ml of the inoculum applied at a rate of 4.68 litres/ha."
Language:English
References:11
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mitra, S., M. Rogers, E. Pedersen, S. Camyon, and J. Turner. 2001. Effect of Azospirillum brasilense and a microbial stimulant on the root development of cool-season turfgrasses. Br. Crop Prot. Coun. Conf. Proc. Weeds. 1:p. 15-22.
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