Full TGIF Record # 315086
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Web URL(s):https://scisoc.confex.com/scisoc/2020am/meetingapp.cgi/Paper/126947
    Last checked: 03/26/2021
Publication Type:
Content Type:Abstract or Summary Only
Author(s):Leiby, Nathanial; Schlossberg, Maxim J.
Author Affiliation:Leiby: Penn State University, University Park, PA ; Schlossberg: Assistant Professor, Pennsylvania State University, University Park, PA
Title:Programmatic vs. responsive phosphorus fertilization strategies for creeping bentgrass putting greens
Section:Golf turf management poster (includes student competition)
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C05 turfgrass science
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Meeting Info.:November 9-13
Source:ASA, CSSA and SSSA International Annual Meetings. Vol. n/a, No. n/a, November 2020, p. 126947.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Related Web URL:https://scisoc.confex.com/scisoc/2020am/mediafile/Handout/ aper126947/2020_Pfert_poster.pdf
    Last checked: 03/26/2021
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Abstract/Contents:The frequent mowing requirement affords turfgrass regularly attentive visitation by trained personnel. Combined with the ease in which straightforward P deficiency symptoms are identified, a responsive strategy of applying P fertilizer immediately following emergence of visual P deficiency symptoms has been proposed. Which, relative to current programmatic and/or soil test driven responsive fertilization approaches, may prove widely effective. Our research objectives are to quantify whether: (1) programmatic or responsive P fertilization regiments support creeping bentgrass vigor, canopy color, canopy density, leaf P, and/or root length density level(s) relative to those simultaneously observed in unfertilized control plots; and (2) P deficient creeping bentgrass canopies reflect a telltale multispectral signature. Penn A-1/A-4 creeping bentgrass programmatic plots were treated with monopotassium phosphate (MKP, 0-52-35) to supply 100 kg P2O5 (ha yr)1 via four split applications. Random assignment and application of the responsive P fertilization treatment (50 kg P2O5 ha1, as MKP) to a previously unfertilized control plot in each block was triggered by one or both of the following: (1) Visual deficiency symptoms; i.e., purple coloration of old leaves, on =7 unfertilized plots, or (2) leaf clipping P levels ≤4.20 g kg-1 in one or more unfertilized plots in ≥4 blocks. A passive multispectral radiometer was used to collect semi-weekly canopy vegetative and color indices. A deep root sampling event (10-28 cm depth) preempted the responsive P fertilization treatment. Likewise, emergence of visual deficiency symptomology was immediately followed by clipping yield collection and subsequent leaf tissue analysis. A second, deep root sampling event was collected from all plots one year following responsive treatment initiation. While sufficient leaf P levels and a canopy free of deficiency symptoms are readily supported by the programmatic P fertilization regiment, improved vigor and/or morphologic features were less so.
Note:This item is an abstract only
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
2020. Programmatic vs. responsive phosphorus fertilization strategies for creeping bentgrass putting greens. Agron. Abr. n/a(n/a):p. 126947.
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    Last checked: 03/26/2021
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