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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Murphy, James J. |
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| Author Affiliation: | Plant Science Department, Rutgers University, New Brunswick, New Jersey |
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| Title: | Application of nitrogen sources and sulfur to modify soil pH and summer patch |
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| Section: | Oral presentations
Other records with the "Oral presentations" Section
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| Meeting Info.: | Cook College, Rutgers, NJ: January 15-16, 1993 |
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| Source: | Proceedings of the Second Annual Rutgers TurfgrassSymposium. Vol. 2, 1993, p. 17. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Nitrogen; Sulfur; Soil pH; Summer patch; Magnaporthe poae; Poa pratensis; Ammonium; Liming; Subsurface application; Application methods
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| Abstract/Contents: | "Summer patch caused by the root infecting fungus Magnaporthe poae is less severe when Kentucky bluegrass (Poa pratensis L.) is fertilized with ammonium (NH4+) forms of nitrogen. Soil pH decreases with the use of NH4+ fertilizer. Liming to raise soil pH has been widely practiced for decades on turf in the humid northeastern region of the United States. After establishment, turf soil pH can only be managed through surface applications; however, turf roots often extend beyond the influence of these applications. This study was initiated in 1992 to: 1) further define the relationship between nitrogen (N) form/soil pH and the development of summer patch; and, 2) determine the ability of surface and subsurface application of nitrogen fertilizers and sulfur (acidifier) to alter soil pH and summer patch development. A 2 x 2 x 2 x 2 treatment factorial was used in split-plot randomized complete block design with 5 replications. Low and high soil pH values were established by liming before seeding as the whole plot factor. The three subplot factors were: i) fertilizer N from [NH4+ and NO3-] ii) sulfur addition [none and 6.5 gm-2], and iii) method of application [surface and injection]. Injection of N fertilizers and sulfur was achieved with high pressure water injection (HydroJect3000; Minneapolis, MN). As expected, liming increased soil pH and NH4+ fertilization decreased soil pH. However, NH4+ fertilization of soil that received lime did not significantly lower soil pH. The method of application did not influence pH near the soil surface (0 to 7.5 cm depth). However, injection of NH4+ lowered soil pH in the 7.5 to 15 cm zone while surface applications had no effect. Future research will evaluate the influence of N form, soil pH, and application method on the development of summer patch." |
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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):
Murphy, J. J. 1993. Application of nitrogen sources and sulfur to modify soil pH and summer patch. Proc. Annu. Rutgers Turfgrass Symp. 2:p. 17. |
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