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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Hartwig, R. C.;
Green, R. L.;
Loeppert, R. H.;
Beard, J. B. |
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| Author Affiliation: | Texas A&M University |
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| Title: | Screening and correcting for Fe-deficiency stress in warm-season turfgrass |
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| Source: | Agronomy Abstracts. October 1990, p. 175. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| Keywords: | TIC Keywords: Iron; Iron deficiency chlorosis; Deficiency; Stenotaphrum secundatum
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| Abstract/Contents: | "Iron deficiency, characterized by chlorosis of plant tissue, is a major limiting factor in turfgrass production on calcareous oils. The objectives of this study were to evaluate a screening procedure which would enable the identification of Fe-deficiency stress-tolerant turfgrass cultivars and to assess the potential of a newly developed synthetic ferrihydrite as a slow-release Fe fertilizer. Iron-stress sensitive (Raleigh St. Augustinegrass) and Fe-stress tolerant (Tifway bermudagrass) cultivars were grown under glasshouse conditions in a growth medium consisting of quartz sand and 5% CaCO3. Iron treatments consisted of synthetic ferrihydrite equivalent to 2 to 10 mg kg-1 DTPA-extractable Fe. Iron chlorosis was noticeable in St. Augustinegrass 83 days after establishment (DAE). Bermudagrass showed no evidence of Fe-stress until 300 DAE. The chlorosis rating and chlorophyll content of each turfgrass species were correlated to the amount of DTPA-extractable Fe in the growth medium. Neither plant biomass nor tissue Fe was correlated to DTPA-extractable Fe. Five mg kg-1 DTPA-extractable Fe was selected as the optimum Fe level to screen for Fe-stress tolerance. Synthetic ferrihydrite applied in amounts greater than 5 mg kg-1 DTPA-extractable Fe was sufficient to alleviate Fe-stress deficiency symptoms." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hartwig, R. C., R. L. Green, R. H. Loeppert, and J. B. Beard. 1990. Screening and correcting for Fe-deficiency stress in warm-season turfgrass. Annu. Meet. Abstr. p. 175. |
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