Peculiarities of yield formation in rye varieties | Zvlastnosti tvorby vynosu hybridnich odrud zita
1998
Capouchova, I. | Petr, J. | Skerik, J. (Ceska Zemedelska Univ., Prague-Suchdol (Czech Republic))
The trials with rye varieties Rapid, Marder and Locarno and classic population of the rye variety Dankovske nove were conducted to study the yield formation of the varieties at the different sowing rate (100, 200, 300, 400 and 500 germinating grains per m2 in hybrid varieties, and 300, 400 and 500 germinating grains per m2 in the population variety) and hence the different density and organization of the stand. The lowest decline of plants was recorded in the lowest sowing rates, greatest in highest sowing rates. The greatest number of tillers per plant in hybrid varieties at lowest sowing rates 100 and 200 germinating grains per m2 was found. The highest yields in the studied set were obtained in hybrid varieties at sowing rates of 200 and 300 germinative grains per m2. When higher sowing rates were used (400 and 500 germinative grains per m2), hybrid varieties responded by statistically significant decrease of yields. In the variety Dankovske nove the sowing rate of 400 germinative grains per m2 seemed to be the best, the differences in yields among different sowing rates 300, 400 and 500 germinative grains per m2 were statistically insignificant. In optimum sowing rates for hybrid varieties (200 to 300 germinative grains per m2) an average number of grains per spike in them ranged from 60 to 58. This resulted in high values of the number of grains per area unit at relatively good level of caryopsis weight. In the population variety Dankovske nove average number of grains per spike was significantly lower - at the sowing rate of 400 germinative grains per m2 in which this variety reached highest yields.
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