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| Web URL(s): | https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj1991.03615995005500020039x
Last checked: 03/01/2024
Access conditions: Item is within a limited-access website
Notes: Abstract only
https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj1991.03615995005500020039x
Last checked: 03/01/2024
Requires: PDF Reader
Access conditions: Item is within a limited access website |
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| Publication Type:
| Refereed |
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| Author(s): | Joo, Y. K.;
Christians, N. E.;
Blackmer, A. M. |
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| Author Affiliation: | Y.K. Joo, Yonsei Univ., Inst. of Agricultural Development, Seoul, Korea; N.E. Christians, Dep. of Horticulture, and A.M. Blackmer, Dep. of Agronomy, Iowa State Univ., Ames. |
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| Title: | Kentucky bluegrass recovery of urea-derived nitrogen-15 amended with urease inhibitor |
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| Source: | Soil Science Society of America Journal. Vol. 55, No. 2, March/April 1991, p. 528-530. |
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| Publishing Information: | Madison, WIS |
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| # of Pages: | 3 |
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| Keywords: | TIC Keywords: Poa pratensis; Urea; Urease inhibitors; Volatility
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| Abstract/Contents: | "Urea is a commonly used N fertilizer on turfgrass areas. Urease inhibitors represent a possible method of reducing volatile loss of NH3 from treated turf. In this study, the recovery of urea-N by a Kentucky bluegrass (Poa pratensis L.) turf was determined in the field by using a 15N tracer. The urease inhibitor N-(n-butyl) thio-phosphoric triamide (NBPT) also was evaluated as a fertilizer amendment to increase urea-N efficiency. The study was conducted on a Nicollet (fine-loamy, mixed, mesic Aquic Hapludoll) soil. Treatments included urea labeled with 5% 15N applied at the rate of 49 kg ha-1 with NBPT at 0 (urea alone), 0.25, and 0.5% of the weight of N. Grass clippings were collected weekly for 5 wk. Shoots, thatch, and rootzone samples were collected at termination. Total urea-derived N recovered from 5 wk of clippings ranged from 7.5% from the areas treated with urea alone to 8.1% in the urea + 0.5% NBPT treated areas. The 0.25% NBPT treatment increased N recovery in the 0 to 7.5 cm depth of soil from 13.6 (urea without NBPT) to 22.4%. This NBPT rate also increased N recovery from the whole soil-plant system from 28.8 (urea without NBPT) to 45.0%, whereas the 0.5% NBPT rate either had no effect or numerically decreased N recovery. The increased N recovery at the low rate of NBPT was probably due to a reduction in NH3 volatilization. The reducing effect of the higher NBPT treatment may have been due to delayed urea hydrolysis and to subsequent increased free-urea loss below the rooting zone after an unusual 130 mm rain during the fifth and sixth days after treatment." |
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| Language: | English |
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| References: | 20 |
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| Note: | Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Joo, Y. K., N. E. Christians, and A. M. Blackmer. 1991. Kentucky bluegrass recovery of urea-derived nitrogen-15 amended with urease inhibitor. Soil Sci. Soc. Am. J. 55(2):p. 528-530. |
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| Web URL(s):
https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj1991.03615995005500020039x
Last checked: 03/01/2024
Access conditions: Item is within a limited-access website
Notes: Abstract only
https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj1991.03615995005500020039x
Last checked: 03/01/2024
Requires: PDF Reader
Access conditions: Item is within a limited access website |
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MSU catalog number: S 590 .S65 |
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