| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Unidad integrada INTA Estaciön Exp. Agropecuaria Balcarce-Facultad de Ciencies Agrarias, Univ. Nacional de Mar del Plata, C.C. 276 (7620) Balcarce, Bs. As., Argentina
* Corresponding author.
The number of grains produced in maize (Zea mays L.) is altered by environmental conditions during growth. The response occurs primarily during flowering. The objective of this work was to study the relationship between intercepted radiation during a 31-d period bracketing flowering and final kernel number per unit area in maize and to analyze the effect of plant density on that relationship. Shading and population density experiments were conducted at Balcarce, Argentina, under no limitations of water and nutrients. A significant and positive association between number of kernels per square meter and intercepted radiation during this 31 d was found for the shading experiments. The slope of this relationship was 5.39 kernels MJ–1 of intercepted radiation. When intercepted radiation at flowering was modified by varying plant density within suboptimal values, the response of number of kernels per unit area was larger than that observed in the shading experiments (28 vs. 5.39 kernels MJ–1; P 
0.001). At supraoptimal densities, the number of kernels per unit area was significantly reduced even though the amount of radiation intercepted by the crop was not affected. This work indicates that a model developed from shading experiments and based on the amount of radiation intercepted by the crop at flowering does not predict the effect of altered plant density on kernel number. Suboptimal and supraoptimal densities produced a strong negative effect on the efficiency with which the crop or plant converts intercepted radiation into grain sink capacity.
Received for publication November 12, 1991.
This article has been cited by other articles:
|
|
 |
|
  J. I. Lizaso, A. E. Fonseca, and M. E. Westgate Simulating Source-Limited and Sink-Limited Kernel Set with CERES-Maize Crop Sci., September 1, 2007; 47(5): 2078 - 2088. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 G. A. Maddonni, A. G. Cirilo, and M. E. Otegui Row Width and Maize Grain Yield Agron. J., October 3, 2006; 98(6): 1532 - 1543. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. M. Hashemi, S. J. Herbert, and D. H. Putnam Yield Response of Corn to Crowding Stress Agron. J., May 13, 2005; 97(3): 839 - 846. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. E. Fonseca, J. I. Lizaso, M. E. Westgate, L. Grass, and D. L. Dornbos Jr. Simulating Potential Kernel Production in Maize Hybrid Seed Fields Crop Sci., September 1, 2004; 44(5): 1696 - 1709. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. I. Lizaso, M. E. Westgate, W. D. Batchelor, and A. Fonseca Predicting Potential Kernel Set in Maize from Simple Flowering Characteristics Crop Sci., May 1, 2003; 43(3): 892 - 903. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. T. Ritchie and G. Alagarswamy Model Concepts to Express Genetic Differences in Maize Yield Components Agron. J., January 1, 2003; 95(1): 4 - 9. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Y. Hebert, E. Guingo, and O. Loudet The Response of Root/Shoot Partitioning and Root Morphology to Light Reduction in Maize Genotypes Crop Sci., March 1, 2001; 41(2): 363 - 371. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. H. Andrade, M. E. Otegui, and C. Vega Intercepted Radiation at Flowering and Kernel Number in Maize Agron. J., January 1, 2000; 92(1): 92 - 97. [Abstract] [Full Text]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Vadose Zone Journal | |||
| Journal of Natural Resources and Life Sciences Education |
Soil Science Society of America Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
