Growth-production and accumulation process in some spring barley varieties
1995
Svihra, J. | Talapka, S. (Vysoka Skola Polnohospodarska, Nitra (Slovak Republic))
Field trials were aimed at solving the issue of growth-production and accumulation process of some varieties of spring barley. The highest increments of dry matter were recorded with the variety Bonus (0.0503 g.m-2.d-1) and the lowest ones were in the Jubilant variety (0.0418 g.m-2.d-1). At the onset of the growing season from tillering to shooting the growth rate of leaf area ranged from 0.073 to 0.090 g.m-2.d-1 and the lowest of growth rate were achieved during milk ripeness from 0.018 to 0.028 g.m-2.d-1. The highest average value of pure performance of photosynthesis had Bonus variety (13.62 g.m-2.d-1) and the lowest one had Svit variety (12.87 g.m-2.d-1). The lowest value of productivity of photosynthesis (CGR) exhibited Galan variety (36.68 g.m-2.d-1) and the highest value Sladko variety (39.48 g.m.-2.d-1). The CGR value was based upon the leaf-area index (LAI) which was the lowest with Bonus variety (2.77) and the highest with Sladko variety (3.01). The highest value on an average for three-year period gave Svit variety (6.75 t.ha-1) and the lowest was achieved by Galan variety (5.64 t.ha-1). The highest content of the crude protein was attained by grains in Galan variety (12.01%) and the lowest grain content was recorded in Jubilant variety (11.79%). Any significant differences in crude protein content were not found between different crops, except for grains of the Sladko variety which reduced the crude protein content almost significantly compared with the control Bonus. After assessment of extract content the highest grain content exhibited Bonus variety (78.9 %) and the lowest grain content Galan variety (78.4 %). The greatest adaptability to the environment manifested the plants of the Jubilant variety.
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