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Changes in the Rhizosphere Effect of Millet Associated with Sprinkler Irrigation with Animal Wastes
Author(s) -
Dazzo Frank B.,
Smith Paul H.,
Hubbell David H.
Publication year - 1974
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1974.00472425000300030018x
Subject(s) - rhizosphere , manure , slurry , microorganism , irrigation , agronomy , bacteria , population , biology , environmental science , environmental engineering , medicine , genetics , environmental health
The microbial population changes in Scranton fine sand and adjacent millet rhizospheres resulting from sprinkler irrigation with cow manure slurry were investigated. Increasing the rate of irrigation with manure slurry resulted in a decline in the R/S ratio of ureolytic, proteolytic, amylolytic, and lipolytic microorganisms. A nutritional grouping study of the predominant bacteria indicated a significant increase in incidence of bacteria requiring amino acids and a decrease in incidence of bacteria requiring soil extract within non‐rhizosphere soil receiving manure applications. These findings, in addition to observed declines in the R/S ratio of microorganisms within soil receiving waste, are taken as evidence that the microbial environment created by irrigating Scranton fine sand with animal waste slurry may become similar to the microbial environment created by the roots of millet.