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| Web URL(s): | https://scisoc.confex.com/scisoc/2020am/meetingapp.cgi/Paper/126848
Last checked: 09/14/2023 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Xu, Zhongqi;
Murphy, James A.;
Clarke, Bruce B. |
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| Author Affiliation: | Department of Plant Biology, Rutgers University, New Brunswick, NJ |
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| Title: | Potassium Fertilization Effect on Dollar Spot of Annual Bluegrass |
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| Section: | Turfgrass pest management poster: Diseases, insects, weeds (includes student competition)
Other records with the "Turfgrass pest management poster: Diseases, insects, weeds (includes student competition)" Section
C05 turfgrass science
Other records with the "C05 turfgrass science" Section
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| Meeting Info.: | San Antonio, Texas: November 9-13, 2020 |
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| Source: | ASA, CSSA, SSSA International Annual Meeting. November 2020, p. 126848. |
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| Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America] |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Potassium is an essential nutrient for growth and stress tolerance of plants. However, the effect of potassium on dollar spot (caused by Clarireedia jacksonii) of annual bluegrass (ABG) [Poa annua L. forma reptans (Hausskn.) T. Koyama] is not known. A field trail was initiated in 2019 to determine the effect of K fertilization on dollar spot of ABG turf mowed at 2.8-mm. A 4 Π2 factorial arranged as a randomized complete block design with four replications evaluated four levels of potassium (0, 3.4, 6.9, 13.8 kg K ha-1 applied every two weeks) and two levels of N (urea) applied at 4.9 kg ha-1 (every 7 days or 28 days) over 28 weeks. K fertilization increased dollar spot by more than 800% compared to 0 kg ha-1 of K, regardless of the N level, and increasing the K rate increased the severity of the disease. Decreasing the N application frequency (rate) to every 28 days increased dollar spot by 18% compared to N fertilization every 7 days. and chlorophyll index were improved by K fertilization leading up to the disease outbreak, regardless of the N fertilization rate, but the quadratic response indicated there was no benefit to increasing K fertilization beyond 3.6 kg ha-1. The first year results suggest that K fertilization up to 3.6 kg ha-1 can improve the quality of ABG turf growing on a root zone with very low K levels; however, increasing K fertilization to 6.9 kg ha-1 or more every 2 weeks may increase susceptibility to dollar spot." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Xu, Z., J. A. Murphy, and B. B. Clarke. 2020. Potassium Fertilization Effect on Dollar Spot of Annual Bluegrass. Agron. Abr. p. 126848. |
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https://scisoc.confex.com/scisoc/2020am/meetingapp.cgi/Paper/126848
Last checked: 09/14/2023 |
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