Influence of triapentenol application in spring of winter rape lodging and yield
1995
Budzynski, W. | Ojczyk, T. (University of Agriculture and Technology, Olsztyn (Poland))
The results of three three-year field experiments involving the use of triapentenol in winter rape are presented. The reaction of three winter rape varieties (E, 0, 00) to this growth regulator and its interaction to sowing density and nitrogen fertilization level were examined. It was found out that the tested types of varieties reacted to triapentenol in the same way. No more advantageous effect of this preparation in a denser field and with a higher level of nitrogen fertilization, i.e. in the conditions causing more intense lodging, was found out. In all the experiments, triapentenol significantly (by 5-11 %) reduced the stem final length and considerably (by 1.4 - 2.7 degrees in a 9-point scale) decreased the lodging of plants. It had no considerable effect on the number of seeds per silique and on the mass of 1,000 seeds. It increased or had no effect on the number of siliques per plant. The influence on rape yield was not unambiquous: in experiments I and II it significantly (by 7-9 %) increased the seed yield; in experiment III - caused a significant (by 7 %) decrease in the seed yield.
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