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 Muchow, R. C. Articles by Sinclair, T. R. Search for Related Content PubMed Articles by Muchow, R. C. Articles by Sinclair, T. R. Agricola Articles by Muchow, R. C. Articles by Sinclair, T. R.

Effect of Nitrogen Supply on Maize Yield: II. Field and Model Analysis

CSIRO, Div. of Tropical Crops and Pastures, Cunningham Laboratory, 306 Carmody Rd., St. Lucia, QLD 4067, Australia
USDA-ARS, Agronomy Physiology Lab., Univ. of Florida, Gainesville, FL 32611-0840.

^* Corresponding author (Email: jap{at}gnv.ifas.ufl.edu).

Experiments investigating the yield response of maize (Zea mays L.) to applications of fertilizer N are generally analyzed empirically. While the nature of the yield response can be characterized, information on the effects of various components influencing the soil and crop N budgets are unresolved. The objective of this study was to examine the results of a series of N fertility experiments with the aid of a mechanistically based crop model. The experiments resulted in grain yields ranging from 99 to 1102 g m^–2, and these yields were well simulated by the model (r² = 0.97). Under high fertility conditions, temperature and solar radiation interception explained the variation in yield among environments. Under low fertility conditions, mineralization of soil organic N was especially important in explaining yield variations among environments. Management practices preceding the experimental crops were hypothesized to have large effects on the N availability in the soil, and consequently influence observed and simulated yields. Sensitivity tests confirmed the importance of defining the initial soil organic N levels in simulating crop growth and yield when there is little or no applied N fertilizer.

Received for publication January 31, 1994.

This article has been cited by other articles:

				C. J. Kucharik and K. R. Brye Integrated BIosphere Simulator (IBIS) Yield and Nitrate Loss Predictions for Wisconsin Maize Receiving Varied Amounts of Nitrogen Fertilizer J. Environ. Qual., January 1, 2003; 32(1): 247 - 268. [Abstract] [Full Text] [PDF]

				M.H. Jeuffroy, B. Ney, and A. Ourry Integrated physiological and agronomic modelling of N capture and use within the plant J. Exp. Bot., April 15, 2002; 53(370): 809 - 823. [Abstract] [Full Text] [PDF]

				F. Jeutong, K.M. Eskridge, W.J. Waltman, and O.S. Smith Comparison of Bioclimatic Indices for Prediction of Maize Yields Crop Sci., November 1, 2000; 40(6): 1612 - 1617. [Abstract] [Full Text] [PDF]