Winter triticale cultivars yield formation
2001
Laur, Ue. | Alaru, M. | Jaama, E. (Estonian Agricultural Univ., Tartu (Estonia). Dept. of Field Crop Husbandry)
Field trials were conducted from September 1998 to August 2000. Only results of 2000 are used in this article. The objective of this research was to determine the effect of nitrogen rates from 0 up to 200 kg N ha (-1) on the yield structure and formation and yield quality of winter triticale cultivars Modus, Dato, Tewo, Presto, Vision, SV 92280, Lasko and Dagro. Nitrogen was applied as ammonium nitrate top-dressed in the spring at the beginning of triticale regrowth. To investigate yield formation and structure, two parallel 1-m row sections in each plot were marked with stakes. Prior to harvesting plants from the marked rows were dug out and bound separately. From these sheaves yield components were measured or counted. Regression, correlation and dispersion analyses were performed with the data. The most important component in yield formation is the number of ear-bearing tillers per m (2) and spike-bearing tillers per plant. Increasing in nitrogen fertilizer rates to 100 kg N per ha raised the number of ear-bearing tillers per plant. Nitrogen rate applied in spring had negative association with the 1000kernels weight and positive association with kernels' number per ear. Because of very humid climatic conditions and pre-harvest sprouting we did not have positive correlation between nitrogen fertilizer and grain yield
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