Crop Science
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 23 February 2005
Published in Crop Sci 45:740-747 (2005)
© 2005 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Abstract Freely available
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Related articles in Crop Science
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via ISI Web of Science (6)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Subedi, K. D.
Right arrow Articles by Ma, B. L.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Subedi, K. D.
Right arrow Articles by Ma, B. L.
Agricola
Right arrow Articles by Subedi, K. D.
Right arrow Articles by Ma, B. L.
Related Collections
Right arrow Maize Management
Right arrow Maize
Right arrow Maize
Right arrow Plant Nutrition

Nitrogen Uptake and Partitioning in Stay-Green and Leafy Maize Hybrids

K. D. Subedi* and B. L. Ma

Eastern Cereal and Oilseed Research Centre (ECORC), Agriculture and Agri-Food Canada, Central Experimental Farm, K.W. Neatby Building, 960 Carling Avenue, Ottawa, ON, Canada, K1A 0C6


Figure 1
View larger version (17K):
[in this window]
[in a new window]

  		Fig. 1. Effect of different nitrogen treatments on ear diameter (cm), ear length (cm), and number of kernels per ear averaged over three hybrids of maize (Pioneer 3905, Pioneer 39F06 Bt, and Maizex LF850 RR). The nitrogen treatments are N1, N supplied from V8 to maturity; N2, N supplied from seedling emergence to V8; N3, N supplied from seedling emergence to silking; N4, N supplied from seedling emergence to 3 wk after silking; and N5 (control), N supplied from seedling emergence to physiological maturity. The bars with the same letter within each parameter are not statistically significant at P < 0.05.

 

Figure 2
View larger version (29K):
[in this window]
[in a new window]

  		Fig. 2. Partitioning of dry matter (g) in different parts of a maize plant as influenced by nitrogen treatments (N1, N supplied from V8 to maturity; N2, N supplied from seedling emergence to V8; N3, N supplied from seedling emergence to silking; N4, N supplied from seedling emergence to 3 wk after silking; and N5 (control), N supplied from seedling emergence to physiological maturity). The values are averaged over three hybrids, and the bars with the same letter within each plant part are not statistically significant at P < 0.05.

 

Figure 3
View larger version (30K):
[in this window]
[in a new window]

  		Fig. 3. Effect of nitrogen treatments on the nitrogen concentration (%) in different parts of a maize plant (g) averaged over three hybrids. The nitrogen treatments are N1, N supplied from V8 to maturity; N2, N supplied from seedling emergence to V8; N3, N supplied from seedling emergence to silking; N4, N supplied from seedling emergence to 3 wk after silking; and N5 (control), N supplied from seedling emergence to physiological maturity. The bars with the same letter within each plant part are not statistically significant at P < 0.05.

 

Figure 4
View larger version (30K):
[in this window]
[in a new window]

  		Fig. 4. Effect of nitrogen treatments on the total nitrogen uptake (g) in different parts of a maize plant averaged over three hybrids. The nitrogen treatments are N1, N supplied from V8 to maturity; N2, N supplied from seedling emergence to V8; N3, N supplied from seedling emergence to silking; N4, N supplied from seedling emergence to 3 wk after silking; and N5 (control), N supplied from seedling emergence to physiological maturity. The bars with the same letter within each plant part are not statistically significant at P < 0.05.

 

Figure 5
View larger version (33K):
[in this window]
[in a new window]

  		Fig. 5. Percentage reduction in nitrogen content in various parts of a maize plant due to different nitrogen treatments, as compared to the control treatment (N5). The nitrogen treatments are N1, N supplied from V8 to maturity; N2, N supplied from seedling emergence to V8; N3, N supplied from seedling emergence to silking; N4, N supplied from seedling emergence to 3 wk after silking; and N5 (control), N supplied from seedling emergence to physiological maturity.

 

Figure 6
View larger version (23K):
[in this window]
[in a new window]

  		Fig. 6. SPAD readings at V8, silking, 2 wk after silking and on a weekly intervals thereafter until physiological maturity in conventional (Pioneer 3905), stay green (Pioneer 39F06 Bt), and Leafy (Maizex LF 850 RR) maize hybrids. The vertical bars are the LSD 0.05 values.

 




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Plant Registrations Soil Science Society of America Journal
Journal of Natural Resources
and Life Sciences Education		 Journal of
Environmental Quality
Copyright © 2005 by the Crop Science Society of America.