Full TGIF Record # 112698
Item 1 of 1
DOI:10.1081/LCSS-200030677
Web URL(s):http://www.informaworld.com/smpp/section?content=a713624569&fulltext=713240928
    Last checked: 05/08/2007
    Access conditions: Item is within a limited-access website
Publication Type:
i
Report
Author(s):Broschat, T. K.; Elliott, M. L.
Author Affiliation:University of Florida, Fort Lauderdale Research and Education Center, Fort Lauderdale, Florida
Title:Nutrient distribution and sampling for leaf analysis in St. Augustinegrass
Source:Communications in Soil Science and Plant Analysis. Vol. 35, No. 15/16, September 2004, p. 2357-2367.
# of Pages:11
Publishing Information:New York, NY: Marcel Dekker
Keywords:TIC Keywords: Stenotaphrum secundatum; Nutrient transport; Tissue testing; Nutrients; Fertilization; Age; Nutrition
Abstract/Contents:"Leaf nutrient analysis for turfgrass is typically performed on clipping samples. However, since clippings of St. Augustinegrass used in lawns consist primarily of the youngest leaves, they may not be that best material to sample, especially for mobile elements. This study examined the concentration gradients of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), mangeanese (Mn), and zinc (Zn) among leaves of various ages to determine their relative mobility within St. Augustingrass[Augustinegrass] [Stenotaphrum secondatum (Walt.) O. Kuntze] plants, and to determine which age of leaves were the best indicators of plant nutritional status for each element. To provide varying levels of fertility on a Hallandale fine sand soil in southern Florida, a landscape area of 'Floratam' St. Augustinegrass was either not fertilized or fertilized with 4.9 g Nm-2 every 3 months from either a mostly water soluble 16-4-8 (N-P2O5-K2O) fertilizer blend or an 8-4-12-4 Mg (N-P2O5-K2O-Mg) controlled-release fertilizer blend containing micronutrients. Leaf samples were obtained twice for analysis, once during the cooler winter months and once during the warmer summer months. About 50 shoots were sampled from each plot, and the leaves were separated according to their position on the shoot axis. Leaf samples were analyzed for N, P, K, Ca, Mg, Fe, Mn and Zn content. Concentrations of each element in each leaf and fertilizer plot were used to determine which leaf position provided the best indicator of plant nutrient status for each element. Nitrogen, P, K and Mn showed decreasing leaf elemental concentrations with increasing leaf age, as is typical for mobile elements, while Ca, Mg and Zn had higher concentrations in the older leaves and were considered immobile in this species. Leaf Fe concentrations were not correlated with either fertilizer treatment or leaf position. Leaf 3, which is the oldest leaf, followed by Leaf 2, was found to be the best indicator of plant nutrient status for all elements, regardless of their mobility. Leaf 1, which is the primary component of turfgrass clippings, was generally the poorest indicator of plant nutritional status and is not recommended for leaf nutrient analysis."
Language:English
References:15
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Broschat, T. K., and M. L. Elliott. 2004. Nutrient distribution and sampling for leaf analysis in St. Augustinegrass. Commun. Soil. Sci. Plant Anal. 35(15/16):p. 2357-2367.
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DOI: 10.1081/LCSS-200030677
Web URL(s):
http://www.informaworld.com/smpp/section?content=a713624569&fulltext=713240928
    Last checked: 05/08/2007
    Access conditions: Item is within a limited-access website
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MSU catalog number: S 590 .C54
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