Avena sativa, straw nitrogen percentage, groat-protein yield, groat-protein percentage
A population of 480 random lines of oats (Avena sativa L.) was grown on soil that received no application of nitrogen (N) or 112 kg of N ha-1 (defined as low- and high-N environments, respectively) to evaluate the effect of N availability in the soil on the plant's ability to partition N between vegetative tissue and the grain, a ratio defined as nitrogen harvest index. Also, comparisons were made between low and high-N environments for grain yield, straw yield, biological yield, groat protein yield, groat protein percentage, vegetative protein yield, straw protein percentage, total plant protein yield, and harvest index.
Genotype x N level interaction was not significant for nitrogen harvest index. The high-N environment caused significant increases in total plant protein yield, vegetative protein yield, and straw protein percentage and significant reductions in nitrogen harvest index and harvest index. Grain yield, straw yield, biological yield, groat protein yield, and groat protein percentage were not different in low- and high-N environments. Nitrogen harvest index and total plant protein yield were negatively correlated in the low-N environment but independent in the high-N environment. Nitrogen harvest index was positively correlated with grain yield and groat protein yield in both environments and positively correlated with groat protein percentage only in the high-N environment.
Journal of the Iowa Academy of Science
© Copyright 1988 by the Iowa Academy of Science, Inc.
Kairudin, N. MD. and Frey, K. J.
"Soil N Availability and Nitrogen Harvest Index of Oats,"
The Journal of the Iowa Academy of Science: JIAS: Vol. 95:
, Article 3.
Available at: http://scholarworks.uni.edu/jias/vol95/iss3/3