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| Web URL(s): | http://crops.confex.com/crops/2005am/techprogram/P4086.HTM
Last checked: 02/02/2006 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Woods, Micah S.;
Rossi, Frank S.;
Ketterings, Quirine M. |
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| Author Affiliation: | Cornell University |
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| Title: | Potassium content of turfgrass leaves expressed on a tissue water basis |
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| Section: | Graduate student oral competition: Breeding, fertility, environment, and management
Other records with the "Graduate student oral competition: Breeding, fertility, environment, and management" Section
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| Meeting Info.: | Salt Lake City, UT: 7-10 November, 2005 |
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| Source: | 2005 Annual Meeting Abstracts [ASA/CSSA/SSSA/CSSS]. 2005, p. [1]. |
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| Publishing Information: | [Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Potassium; Leaves; Dry weight; Relative water content; Agrostis stolonifera; Tissue testing; Potassium fertilizers
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| Abstract/Contents: | "Potassium content of turfgrass leaves is usually reported on a dry weight basis as g K kgI-1 dry matter (KD). By measuring tissue water content (TWC), K can alternatively be expressed as mmol K L-1 (KW). We compared KD to KW in creeping bentgrass [Agrostis stoloniferaI var. palustris (Huds.) Farw.] tissue samples collected from field- and greenhouse-grown plants that were treated with varying rates of K fertilizer, grown in sand rootzones of differing exchangeable K content, and allowed to vary in TWC. A generally accepted sufficiency range of KD is (15 to 30 g kg-1), and KW may need to be maintained above 80 mmol L-1 to meet the biochemical K requirement, with additional K contributing to the biophysical demand for K. We found that in a range of KD from 5 to 25 g kg-1, the KW ranged from about 50 to 230 mmol L-1. However, samples with KD below 15 g kg-1 often had KW above 150 mmol L-1. Increasing TWC is associated with lower KW and higher KD. It appears that much of the variability in KD can be explained by TWC, and the sufficiency ranges for creeping bentgrass K content may be more physiologically meaningful if they are based on KW rather than KD." |
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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):
Woods, M. S., F. S. Rossi, and Q. M. Ketterings. 2005. Potassium content of turfgrass leaves expressed on a tissue water basis. Annu. Meet. Abstr. p. [1]. |
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Last checked: 02/02/2006 |
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