Productivity of spring barley grown with red clover as undersown crop
2006
Zuk-Golaszewska, K. | Bielski, S.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Crop Production | Golaszewski, J.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Plant Breeding and Seed Production
The study was based on the results of a three-year series (2001-2003) of two-factorial experiments established in a split-plot design with di- and tetraploid forms of red clover and various sowing rates (4, 8, 12, 16 kg/ha). It was found that spring barley yield depended on the environmental conditions prevailing in particular years of the study, and varied in a wide range from 2.7 to 4.5 t/ha. The forms of red clover had no impact on plant growth or grain yield, whereas increasing sowing rates over 8 kg/ha might result in yield decrease. The interdependence between spring barley traits were similar. A significant simple correlation and direct path effects between grain weight per ear and grain yield, calculated for red clover treatments (forms and sowing rates), suggest that grain weight per ear can be used as a predictor of spring barley yield when sown with spring barley. Stubble-clover yield amounted to 7.25 t/ha and was determined by rainfall. Plant habit of red clover was closely related to sowing rate. An increase in sowing rates was followed by a significant decrease in the number of branches and the dry matter content of the aboveground parts of plants
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