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Web URL(s):	https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/133828     Last checked: 03/28/2022     Requires: JavaScript
Publication Type:	Report
Content Type:	Abstract or Summary only
Author(s):	McNally, Brandon C.; Elmore, Matthew T.; Kowalewski, Alexander R.; Murphy, James A.; Murphy, Stephanie
Author Affiliation:	McNally and James A. Murphy: Department of Plant Biology, Rutgers Unversity, New Brunswick, NJ; Elmore: Department of Plant Biology, Rutgers University, East Brunswick, NJ; Kowalewski: Horticulture, Oregon State University, Corvallis, OR; Stephanie Murphy: Rutgers University, New Brunswick, NJ
Title:	Annual bluegrass and creeping bentgrass tiller response to phosphate fertilizer and soil pH when grown in competition
Section:	Turfgrass pest management oral I (includes student competition) Other records with the "Turfgrass pest management oral I (includes student competition)" Section C05 turfgrass science Other records with the "C05 turfgrass science" Section
Meeting Info.:	Salt Lake City, Utah, November 7-10, 2021
Source:	ASA, CSSA and SSSA International Annual Meetings. 2021, p. 133828.
# of Pages:	1
Publishing Information:	[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
Abstract/Contents:	"Previous research indicates annual bluegrass (AB; Poa annua L.) infestation, growth, and establishment is favored in high P soils. Creeping bentgrass (CB; Agrostis stolonifera L.) has demonstrated sufficient growth in low P soils in monoculture. The critical P level for AB and CB is not well defined and it is unclear what soil P concentration may provide CB an advantage over AB when in competition. The objective of this research was to determine if phosphate application and soil pH influence sward composition of AB and CB tillers grown in competition. Two experimental runs were conducted for 90 days in a glasshouse in New Brunswick, NJ from March to June 2021. Treatments consisted of five phosphorus rates (0, 3, 6, 9, and 12 kg P ha-1 via triple superphosphate) and two pH levels (5.6 and 7.1). Pots (15-cm diam.,18-cm deep) contained sand with 4 mg kg-1 Mehlich-3 P and were arranged in a complete factorial randomized complete block design with four replications. Line-intersect grid counts were conducted 90 days after planting (DAP) to determine AB and CB cover. Light box photos taken 90 DAP were analyzed in Turf Analyzer software to determine overall green cover. Turfgrass quality was visually rated 90 DAP on a 1 (poor quality) to 9 (excellent quality) scale. The highest phosphate rate in the high pH soil resulted in the highest AB cover (61%). Phosphate at 3 kg P ha-1 in the low soil pH provided the greatest CB cover (72%). Phosphorus receiving treatments in the low soil pH had similar overall green cover (70 to 73%). Phosphate applications in low P soils are necessary for establishment and quality. This research suggests that lower P rates in moderately acidic soils can reduce AB infestations in CB, while maintaining adequate overall green cover and turfgrass quality."
Language:	English
References:	0
Note:	This item is an abstract only! "47-8"
	ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): McNally, B. C., M. T. Elmore, A. R. Kowalewski, J. A. Murphy, and S. Murphy. 2021. Annual bluegrass and creeping bentgrass tiller response to phosphate fertilizer and soil pH when grown in competition. Agron. Abr. p. 133828.
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