HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Norman, R. J. Articles by Wells, B. R. Search for Related Content PubMed Articles by Norman, R. J. Articles by Wells, B. R. Agricola Articles by Norman, R. J. Articles by Wells, B. R.

Mineralization of Nitrogen from Nitrogen-15 Labeled Crop Residues and Utilization by Rice

Univ. of Arkansas Rice Research and Extension Center, P.O. Box 351, Stuttgart, AR 72160

J. T. Gilmour and B. R. Wells

Dep. of Agronomy, Univ. of Arkansas, Fayetteville, AR 72701

*Corresponding author.

ABSTRACT

The availability of N from the residues of the previous crop to the subsequent rice (Oryza sativa L.) crop is largely unknown. The objectives of this study were to (i) measure the mineralization of N from ¹⁵N-labeled rice, soybean (Glycine max L.), and wheat (Triticum aestivum L.) residues and the uptake by a subsequent rice crop; and (ii) compare the ¹⁵N tracer method with the standard fertilizer-N response method used in field studies to quantify the N contribution from the crop residue to the next crop. Nitrogen mineralization from decomposing crop residues was measured by soil sampling prior to seeding the rice crop and after seeding by plant sampling the rice at maturity. The minimum estimate of the amount of residue N mineralized from the time of residue incorporation until rice harvest was 9, 52, and 38% of the rice, soybean, and wheat residue N, respectively. The amount of residue N recovered in the rice crop was 3, 11, and 37% of the rice, soybean, and wheat residue N, respectively. The lower the C/N ratio and the higher the amount of N in the residue, the lower was the amount of residue N recovered in the soil organic fraction at harvest and the higher was the amount of residue N mineralized. The ¹⁵N tracer method compared favorably with the fertilizer N response method when the uptake efficiency of the fertilizer N was taken into account.

Contribution of the Dep. of Agronomy, Univ. of Arkansas and the Arkansas Agric. Exp. Stn. Supported in part by the Tennessee Valley Authority's National Fertilizer Development Center and the Arkansas Rice Research and Promotion Board.

Received for publication August 31, 1989.

This article has been cited by other articles:

				F. B. Fritschi, B. A. Roberts, D. W. Rains, R. L. Travis, and R. B. Hutmacher Recovery of Residual Fertilizer-N and Cotton Residue-N by Acala and Pima Cotton Soil Sci. Soc. Am. J., April 11, 2005; 69(3): 718 - 728. [Abstract] [Full Text] [PDF]

				N. A. Slaton, E. E. Gbur Jr., R. D. Cartwright, R. E. DeLong, R. J. Norman, and K. R. Brye Grain Yield and Kernel Smut of Rice as Affected by Preflood and Midseason Nitrogen Fertilization in Arkansas Agron. J., January 1, 2004; 96(1): 91 - 99. [Abstract] [Full Text] [PDF]

				A. J. Eagle, J. A. Bird, J. E. Hill, W. R. Horwath, and C. van Kessel Nitrogen Dynamics and Fertilizer Use Efficiency in Rice following Straw Incorporation and Winter Flooding Agron. J., November 1, 2001; 93(6): 1346 - 1354. [Abstract] [Full Text] [PDF]

				M. S. Aulakh, T.S. Khera, J. W. Doran, and K. F. Bronson Managing Crop Residue with Green Manure, Urea, and Tillage in a Rice-Wheat Rotation Soil Sci. Soc. Am. J., May 1, 2001; 65(3): 820 - 827. [Abstract] [Full Text] [PDF]