Full TGIF Record # 315097
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https://scisoc.confex.com/scisoc/2020am/mediafile/Handout/Paper128531/CSSA_Bowling_2020.pdf
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Publication Type:
i
Report
Content Type:Abstract or Summary Only
Author(s):Grubbs, Rebecca A.; Henry, Gerald M.; Cabrera, Miguel L.
Author Affiliation:Grubbs: Soil and Crop Sciences, Texas A&M University, Dallas, TX; Henry: Associate Professor, Environmental Turfgrass Science, Miller Plant Sciences Bldg, University of Georgia-Athens, Athens, GA; Cabrera: Professor, Crop and Soil Sciences, University of Georgia-Athens, Athens, GA
Title:Effects of mowing interval on turfgrass clipping tissue characteristics and soil nitrogen dynamics
Section:Turfgrass science poster
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C05 turfgrass science
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Meeting Info.:November 9-13, 2035
Source:ASA, CSSA and SSSA International Annual Meetings. November 2020, p. 128531.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:Understanding the role of clipping biomass in turfgrass system nutrient budgets is critical to establishing best fertility practices and improving nitrogen-use efficiency (NUE) in turfgrass systems. The objective of this study was to evaluate the effect of mowing frequency on clipping tissue characteristics [carbohydrates (CHO), cellulose, lignin, nitrogen (N) and carbon-to-nitrogen ratio (C:N)], nitrogen mineralization (%NMin) and ammonia volatilization (%AV) from decomposing TifTuf bermudagrass [Cynodon dactylon (L.) Pers. x Cynodon transvaalensis Burtt Davy] clippings applied to the soil surface. Turfgrass clippings were collected from two research facilities in Athens, GA (ATREC and Riverbend) at 3-, 7-, 10-, and 14-day mowing intervals (MI). A subsample of clippings from each plot was ground and analyzed using near-infrared spectroscopy to determine tissue characteristics. Soil from each location was packed into polyvinyl chloride cylinders, adjusted to -0.33 MPa moisture content, treated with grass clippings on the surface or left unamended, and incubated at 28Ā°C for 90 d. Cumulative evolved NH3 was trapped, and inorganic N was extracted from each cylinder and analyzed colorimetrically after 90 d. Rates of %NMin varied significantly across treatments and locations, making it difficult to make informed recommendations for reducing N fertilization based on MI. While dry yield (g m-2) and tissue characteristics (CHO, cellulose, and lignin) were found to be significant parameters in predicting %NMin, no clear relationship was established between MI and tissue characteristics in this study. In general, more frequent mowing (3-d MI) appeared support more vigorous turfgrass growth through greater net clipping yield, and also may also decrease %AV as a function of smaller clipping yield for unique mowing events. This suggests that mowing more than 1x per week may be more NUE and promote healthier turfgrass systems overall.
Language:English
References:0
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
2020. Effects of mowing interval on turfgrass clipping tissue characteristics and soil nitrogen dynamics. Agron. Abr. p. 128531.
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https://scisoc.confex.com/scisoc/2020am/meetingapp.cgi/Paper/128531
    Last checked: 04/02/2021
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https://scisoc.confex.com/scisoc/2020am/mediafile/Handout/Paper128531/CSSA_Bowling_2020.pdf
    Last checked: 04/02/2021
    Requires: PDF Reader
    Notes: Direct download
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