| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Dep. of Plant Science and Technology, North Carolina A&T State Univ., Greensboro, NC 27411
Dep. of Soil and Water Science, Univ. of Florida-IFAS, Gainesville, FL 32611
*Corresponding author.
ABSTRACT
Nitrogen utilization by corn (Zea mays L.) is influenced by the form of inorganic N present in the root zone. A field experiment was conducted on Enon sandy loam (fine, mixed, thermic Ultic Hapludalf) to determine N use efficiency and its partitioning in various plant parts of corn. Ammonium nitrate labeled either as 15NH4-N or 15NO3-N and applied at 50, 100, or 200 kg N ha–1 was evaluated. Microplots (1.06 m2) were established in the main N plots for 15N fertilizer application, and main plots were used to determine grain yield. After the crop harvest, soil N alone, fertilizer N used by the crop, and fertilizer N remaining in inorganic and organic forms in the top 75 cm of the soil were measured. Grain yield response to N application was significant (P < 0.01). Recovery of applied fertilizer N in corn and weeds ranged from 43 to 57% and 3 to 5%, respectively. Nitrogen sources showed no significant differences with respect to N accumulation in corn. Only 17 to 20% of the fertilizer N was recovered in the grain. The amounts of soil N utilized by the corn was about three-to sixfold higher than the fertilizer N, suggesting extensive turnover of soil and fertilizer N through immobilization and mineralization. More N was recovered (21–63% of added N) in the soil from 15NH4 than from 15NO3 (6–38%). Loss of N (unaccounted for) ranged from 11 to 18% at 100 kg N ha–1 and from 34 to 48% at 200 kg N ha–1. Nitrogen loss was higher in the plots receiving 15NO3 than 15NH4. Most of the fertilizer N remaining in the soil at the end of the growing season was in the organic fraction, suggesting immobilization into microbial and root biomass.
Joint contribution from North Carolina A&T State Univ. and Univ. of Florida.
Received for publication February 21, 1992.
This article has been cited by other articles:
|
|
 |
|
  S. A. Khan, R. L. Mulvaney, T. R. Ellsworth, and C. W. Boast The Myth of Nitrogen Fertilization for Soil Carbon Sequestration J. Environ. Qual., October 24, 2007; 36(6): 1821 - 1832. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. A. Martens, D. B. Jaynes, T. S. Colvin, T. C. Kaspar, and D. L. Karlen Soil Organic Nitrogen Enrichment Following Soybean in an Iowa Corn-Soybean Rotation Soil Sci. Soc. Am. J., February 2, 2006; 70(2): 382 - 392. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 W. B. Stevens, R. G. Hoeft, and R. L. Mulvaney Fate of Nitrogen-15 in a Long-Term Nitrogen Rate Study: I. Interactions with Soil Nitrogen Agron. J., June 17, 2005; 97(4): 1037 - 1045. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. B. Stevens, R. G. Hoeft, and R. L. Mulvaney Fate of Nitrogen-15 in a Long-Term Nitrogen Rate Study: II. Nitrogen Uptake Efficiency Agron. J., June 17, 2005; 97(4): 1046 - 1053. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. R. S. Rozas, H. E. Echeverria, and P. A. Barbieri Nitrogen Balance as Affected by Application Time and Nitrogen Fertilizer Rate in Irrigated No-Tillage Maize Agron. J., November 1, 2004; 96(6): 1622 - 1631. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. B. Fritschi, B. A. Roberts, D. W. Rains, R. L. Travis, and R. B. Hutmacher Fate of Nitrogen-15 Applied to Irrigated Acala and Pima Cotton Agron. J., May 1, 2004; 96(3): 646 - 655. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. F. Salifu and V. R. Timmer Nitrogen Retranslocation Response of Young Picea mariana to Nitrogen-15 Supply Soil Sci. Soc. Am. J., January 1, 2003; 67(1): 309 - 317. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. L. Dinnes, D. L. Karlen, D. B. Jaynes, T. C. Kaspar, J. L. Hatfield, T. S. Colvin, and C. A. Cambardella Nitrogen Management Strategies to Reduce Nitrate Leaching in Tile-Drained Midwestern Soils Agron. J., January 1, 2002; 94(1): 153 - 171. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. R. S. Rozas, H. E. Echeverria, and L. I. Picone Denitrification in Maize Under No-Tillage: Effect of Nitrogen Rate and Application Time Soil Sci. Soc. Am. J., July 1, 2001; 65(4): 1314 - 1323. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Vadose Zone Journal | Journal of Plant Registrations | ||||
| Journal of Natural Resources and Life Sciences Education |
Journal of Environmental Quality |
||||
