The effect of nitrogen content in wheat (Triticum aestivum L.) stem on its mechanical stability
1996
Paulin, J. | Tajnsek, A. (Ljubljana Univ. (Slovenia). Biotechnical Fac., Agronomy Dept.)
A field study was conducted on shallow loamy sand soil near Ljubljana (Slovenia) to determine the mechanical stability of wheat stem in connection with its N content and population density. Analysis showed statistically high significant influence of N nutrition on the amount and content of N in the stem, as well as of population density, however by the highest rates (220 units of N) N content in the stem was not significantly higher than by 180 units of N. Population density affected the absolute amount of N in the stem but not the concentration. Regression analysis defined high significant parabolic dependence of mechanical stability on the amount of N in the stem, while N concentration in the stem affected the stem brekage only in EC 45 by both population densities and in EC 81/82 by lower population density. Results also showed increased resistence to stem breakage at the beginning of increasing the amount of N in plant, while further increase of N content in plants caused a decrease of mechanical stability.
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