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Alfalfa, Medicago sativa L., in highly weathered, acid soils, 2: yield and acetylene reduction of a plant germplasm and Rhizobium meliloti inoculum selected for tolerance to acid soil

By: Contributor(s): Material type: ArticleArticlePublication details: 1981ISSN:
  • 1573-5036 (Revista en electrónico)
Subject(s): DDC classification:
  • 82-778895
 In: Plant and Soil v. 60, no. 2, p. 205-21182-778895Summary: Alfalfa plants, Medicago sativa L., were selected from the Florida 66 cultivar for vigor in an acid and a limed, fertilized Cecil topsoil. The selected plants were intermated by selection condition to achieve two germplasms, acid selected (A-1) and limed, fertile selected (L-1). A Rhizobium meliloti strain (79-4s) was isolated from a high acetylene reducing nodule from a plant in a similar acid soil. The germplasms and the Rhizobium strain were then tested in greenhouse pots for agronomic performance under a variety of soil pH and fertility conditions. The 79-4s inoculum, as well as commercially prepared inoculum, gave better plant yield and acetylene reduction (N(,2)-fixation) at all harvests when compared to a sterile peat control, but the commercial inoculum was the best inoculum treatment. The A-1 germplasm produced higher shoot dry weight at the final harvest than did the L-1 germplasm at all soil pH's when P and K were applied at the highest rates. The A-1 germplasm also had better root weight (mainly fibrous roots) and acetylene reduction in these soil conditions. The two germplasms appear to be genetically distinct and respond differently depending on soil pH and fertility conditions
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Item type Current library Collection Call number Copy number Status Date due Barcode Item holds
Article CIMMYT Knowledge Center: John Woolston Library AGRIS Collection 82-778895 (Browse shelf(Opens below)) 1 Available 82-778895
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11 ref.; Summary (En)

Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0032-079X

Alfalfa plants, Medicago sativa L., were selected from the Florida 66 cultivar for vigor in an acid and a limed, fertilized Cecil topsoil. The selected plants were intermated by selection condition to achieve two germplasms, acid selected (A-1) and limed, fertile selected (L-1). A Rhizobium meliloti strain (79-4s) was isolated from a high acetylene reducing nodule from a plant in a similar acid soil. The germplasms and the Rhizobium strain were then tested in greenhouse pots for agronomic performance under a variety of soil pH and fertility conditions. The 79-4s inoculum, as well as commercially prepared inoculum, gave better plant yield and acetylene reduction (N(,2)-fixation) at all harvests when compared to a sterile peat control, but the commercial inoculum was the best inoculum treatment. The A-1 germplasm produced higher shoot dry weight at the final harvest than did the L-1 germplasm at all soil pH's when P and K were applied at the highest rates. The A-1 germplasm also had better root weight (mainly fibrous roots) and acetylene reduction in these soil conditions. The two germplasms appear to be genetically distinct and respond differently depending on soil pH and fertility conditions

English

Springer

AGRIS Collection


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