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DOI: | 10.21273/JASHS.124.6.719 |
Web URL(s): | https://journals.ashs.org/jashs/view/journals/jashs/124/6/article-p719.xml?rskey=0IqLCO Last checked: 11/14/2019 Requires: PDF Reader |
Publication Type:
| Refereed |
Author(s): | Picchioni, G. A.;
Quiroga-Garza, Héctor M. |
Author Affiliation: | Picchioni: Assistant professor and Quiroga-Garza: former graduate student, Department of Agronomy and Horticulture, New Mexico State University |
Title: | Growth and nitrogen partitioning, recovery, and losses in bermudagrass receiving soluble sources of labeled ¹⁵nitrogen |
Section: | Soil-plant-water relationships Other records with the "Soil-plant-water relationships" Section
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Source: | Journal of the American Society for Horticultural Science. Vol. 124, No. 6, November 1999, p. 719-725. |
Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
# of Pages: | 7 |
Keywords: | TIC Keywords: Nitrogen; Nitrogen fertilization; Cynodon dactylon; Cynodon transvaalensis; Nitrogen fate; Nitrogen recovery; Nitrogen partitioning; Photoperiod; Urea; Ammonium sulfate; Ammonium nitrate; Nitrogen efficiency; Nitrogen uptake; Environmental factors; Temperatures; Photosynthesis; Clipping weight; Verdure; Thatch; Root weight; Application rates; Autumn
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Cultivar Names: | Tifgreen |
Abstract/Contents: | "Two greenhouse studies were conducted to trace the fate of fertilizer N in hybrid bermudagrass [Cynodon dactylon (L.) Pers. X C. transvaalensis Burtt-Davy 'Tifgreen'], and to estimate total plant N recovery and losses. The first experiment was performed during winter, with artificial light supplementing natural light to provide a photoperiod of 13.6 to 13.8 hours. The second experiment was conducted during summer and fall under only natural light conditions, with a progressively decreasing photoperiod of 13.7 to 11.1 hours. Urea (UR), ammonium sulfate (AS), and ammonium nitrate (AN) were labeled at 2 atom% ¹⁵N, and applied at N rates of 100 or 200 kg·ha⁻¹ for 84 days (divided into six equal fractions and applied every 14 days). Fertilizer N source did not affect total dry matter (DM) accumulation by the plant components, but the high N rate increased clipping DM production under the longer photoperiod. Under the decreasing photoperiod, overall DM production was reduced, and clipping DM production was unaffected by increased N rate. Average N concentration of clippings varied between N sources, ranging from a high of 38.6 g·kg⁻¹ DM with AS to a low of 34.7 g·kg⁻¹ for UR. In Expt. 1, the greatest total plant N recovery [clippings, verdure (shoot material remaining after mowing), and thatch plus roots] occurred with AS (78.5%) and the lowest with UR (65.9%). In Expt. 2, these values declined to 53.0% and 38.0%, respectively. Urea fertilization resulted in the greatest N losses as a fraction of the N applied (33.6% to 61.5%) and AS fertilization the lowest (20.7% to 46.3%). In view of the greater N losses, UR may be a less suitable soluble N source for bermudagrass fertilization within the conditions of this study. In addition, late-season N fertilization may result in a significant waste of fertilizer N as bermudagrass progresses into autumnal dormancy when temperature, photoperiod, and irradiance decline and cause reduction in growth and N uptake." |
Language: | English |
References: | 27 |
See Also: | Other items relating to: AUTUMN |
Note: | Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Picchioni, G. A., and H. M. Quiroga-Garza. 1999. Growth and nitrogen partitioning, recovery, and losses in bermudagrass receiving soluble sources of labeled ¹⁵nitrogen. J. Am. Soc. Hortic. Sci. 124(6):p. 719-725. |
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| DOI: 10.21273/JASHS.124.6.719 |
| Web URL(s): https://journals.ashs.org/jashs/view/journals/jashs/124/6/article-p719.xml?rskey=0IqLCO Last checked: 11/14/2019 Requires: PDF Reader |
| MSU catalog number: SB 1 .A46 |
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