Full TGIF Record # 14854
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Publication Type:
Author(s):Skousen, J. G.; Call, C. A.; Weaver, R. W.
Author Affiliation:Texas A&M University, College Station, TX.
Title:Recovery of 15N-labelled Fertilizer by Coastal Bermudagrass in Lignite Minesoil
Source:Plant and Soil. Vol. 114, No. 1, February 1989, p. 39-43.
Publishing Information:Dordrecht, Netherland: Martinus Nijhoff Publishers
Related Web URL:http://link.springer.com/article/10.1007/BF02203079
    Last checked: 10/14/2015
    Notes: Abstract only
Keywords:TIC Keywords: Plant recovery; Nitrogen fertilizers; Cynodon dactylon; Mine soils; Ammonium sulfate; Clippings; Distribution
Abstract/Contents:"Minesoils developed from lignite surface mining in Texas are nutrient-poor and have a high N retention capacity. A major concern of landowners and soil conservationists is the response of Coastal bermudagrass to the application of low rates of ammonium-N fertilizer on these nutrient-poor minesoils. A glass house study, using 15N-labelled ammonium sulfate fertilizer and lignite minesoil, was conducted to measure Coastal bermudagrass biomass production and fertilizer recovery during establishment in response to clipping at 2, 4, and 8 week intervals. At N rates of 0, 40, and 80 kg N ha-1, increases in N fertilization increased Coastal bermudagrass aboveground biomass 5-fold, but showed only small increases in belowground biomass. Recovery of ammonium-N fertilizer ranged from 54 to 63%. Roots contained approximately the same N content across all fertilizer rates suggesting that young, establishing, Coastal bermudagrass roots reserve N until their N requirement is met. As more N is obtained above that which was needed to maintain roots, then additional N taken up by the plant was transported to aboveground plant parts for growth. Frequent clipping intensified N transport to aboveground tissues. Reduced amounts of N were contained in roots after clipping due to reductions in root growth, biomass, and resource demand. Fertilization of Coastal bermudagrass at low N rates with different N fertilizer forms influenced the distribution of N in the plant and affected N recovery by different parts of the plant."
Geographic Terms:Texas
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Skousen, J. G., C. A. Call, and R. W. Weaver. 1989. Recovery of 15N-labelled Fertilizer by Coastal Bermudagrass in Lignite Minesoil. Plant Soil. 114(1):p. 39-43.
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