Premium
Nutritional Groups of Soil Bacteria on the Roots of Barley and Oats
Author(s) -
Wallage R. H.,
King H. deL.
Publication year - 1954
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1954.03615995001800030013x
Subject(s) - rhizosphere , bacteria , biology , tiller (botany) , agronomy , avena , soil water , botany , horticulture , ecology , genetics
Barley and oats were grown each in five replicate field plots. At two stages of growth, namely the “tiller” and “head” stages, plants were removed and bacteria were isolated from composite samples of soil that adhered to the roots. Bacteria were also isolated from the soil between the rows of plants. The bacteria then were arranged into seven groups according to their growth in a variety of nutritional media; in general it was found that those requiring yeast extract occurred with the greatest frequency. The results were analysed statistically and it was found that specific ‘rhizosphere effects’ existed chiefly in relation to the age of the plants, and that those effects occurred more frequently with regard to barley than with oats. It was concluded that root excretions in the rhizosphere soils of barley and oats had little or no effect on the equilibrium of the nutritional groups. Emphasis is placed on the importance of replicating samples and analysing results statistically.