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| DOI: | 10.21273/JASHS.128.4.0492 |
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| Web URL(s): | https://journals.ashs.org/jashs/view/journals/jashs/128/4/article-p492.xml?rskey=LOU2zH
Last checked: 11/19/2019
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Zhang, Xunzhong;
Ervin, E. H.;
Schmidt, R. E. |
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| Author Affiliation: | Department of Crop and Soil Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia |
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| Title: | Physiological effects of liquid applications of a seaweed extract and humic acid on creeping bentgrass |
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| Source: | Journal of The American Society for Horticultural Science. Vol. 128, No. 4, July 2003, p. 492-496. |
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| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
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| # of Pages: | 5 |
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| Keywords: | TIC Keywords: Seaweed products; Humic acids; Biostimulants; Physiology; Agrostis stolonifera; Cytokinins; Auxins; Polyamines; Fertilization; Application rates; Disease resistance; Dollar spot; Sclerotinia homoeocarpa
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| Abstract/Contents: | "A variety of organic materials such as humic substances, seaweed extracts (SWE), organic matter, and amino acids are being used as fertilizer supplements in commercial turfgrass management. Amoung them, SWE and humic acid (HA) are widely used in various biostimulant product formulations. These compounds have been reported to contain phytohoromones and osmoprotectants such as cytokinins, auxins, polyamines, and betaines. Manufacturer claims are that these products may supplement standard fertility programs by reducing mineral nutrient requirements while improving stress tolerance. There is a lack of season-long, field-based evidence to support these claims. This study was conducted to investigate the influence of monthly field applications of SWE, HA and high and low seasonal fertilization regimes on the physiological health of fairway-height creeping bentgrass (Agrositis stolonifera L.). Plots were treated monthly with SWE at 16mg·m-2 and HA (70 % a.i.) at 38 mg·m-2 alone, or in combination, and were grown under low (20kg·ha-1/month) or high(50kg·ha-1/month) fertilization regimes during 1996 and 1997. Endogenous antioxidant superoxide dismutase (SOD) activity, photochemical activity (PA) and turf quality were measured in July of each year. Superoxide dismutase activity was increased by 46 % to 181%, accompanied by a PA increase of 9 % to 18 %, and improved visual quality of bentgrass in both years. There was no significant fertilization x supplement interaction. Although not part of our original objectives, it was noted that significantly less dollar spot (Sclerotinia homoeocarpa F. T. Bennett) disease incidence occured in supplement-treated bentgrass. Our results indicate that increased SOD activity in July due to SWE and/or HA applications improved overall physiological health, irrespective of fertilization regime. This suggests that these compounds may be beneficial supplements for reducing standard fertilizer and fungicide inputs, while maintaining adequate creeping bentgrass health." |
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| Language: | English |
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| References: | 42 |
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| See Also: | Other items relating to: Biostimulants |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Zhang, X., E. H. Ervin, and R. E. Schmidt. 2003. Physiological effects of liquid applications of a seaweed extract and humic acid on creeping bentgrass. J. Am. Soc. Hortic. Sci. 128(4):p. 492-496. |
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| DOI: 10.21273/JASHS.128.4.0492 |
| Web URL(s):
https://journals.ashs.org/jashs/view/journals/jashs/128/4/article-p492.xml?rskey=LOU2zH
Last checked: 11/19/2019
Requires: PDF Reader |
| 
MSU catalog number: SB 1 .A46 |
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