Full TGIF Record # 317116
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/134306
    Last checked: 03/31/2022
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Noons, Brendan; Guillard, Karl; Morris, Thomas F.
Author Affiliation:University of Connecticut, Storrs, CT
Title:Nitrogen and phosphorus leaching from compost-amended lawns
Section:C05 turfgrass science
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Turfgrass science oral I (includes student competition)
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Meeting Info.:Salt Lake City, Utah: November 7-10, 2021
Source:ASA, CSSA and SSSA International Annual Meetings. 2021, p. 134306.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"The use compost is a growing trend in turfgrass lawn maintenance practices, however, there are insufficient data to determine risks to water quality from compost amendments to lawns. The objectives of the study were to: 1) determine the N and P concentrations in percolate collected from lawn plots fertilized yearly with varying rates of compost, and 2) determine if a relationship exists between percolate N and P concentrations and soil test labile N and extractable P concentrations. The experiment was set out as a completely random design with 7 compost rates (0, 61, 124, 185, 246, 309, and 370 m3 ha-1) with 2 replicates on a Kentucky bluegrass lawn. Each plot contained a zero-tension soil monolith lysimeter that drained into a collection well. In 2020, wells were measured for percolate volume and samples were extracted every week or less depending on rain. Samples were analyzed for concentrations of (NO2+NO3)-N, Orthophosphate (PO4-P) and total Kjeldahl phosphorus (TP). Concentrations of (NO2+NO3)-N were < 1 mg L-1, whereas concentrations of PO4-P were between 0.1 and 0.5 mg L-1 and TP concentrations occasionally exceeded 2.0 mg L-1. Soil test data showed moderate (for labile N) to strong (for extractable P) correlations with the flow-weighed concentrations of percolate N and P. Percolate concentrations of (NO2+NO3)-N did not exceed 1 mg L-1 when soil labile N concentrations were ≤ 170 mg/kg. Whereas percolate concentrations of PO4-P and TP did not exceed 0.05 and 1 mg L-1, respectively, when modified-Morgan extractable P concentrations were ≤ 135 kg ha-1. The results of the study suggest that low rates of compost frequently applied to turfgrass lawns have a low risk of contributing to water quality impairment. Whereas commonly recommended higher rates of compost to lawns may contribute to water quality impairment from leaching losses of P from long-term applications."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Noons, B,, K. Guillard, and T. F. Morris. 2021. Nitrogen and phosphorus leaching from compost-amended lawns. Agron. Abr. p. 134306.
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    Last checked: 03/31/2022
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