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Effects of Production Factors on Seed Yield and Yield Components of Red Fescue (Festuca rubra L. ssp. genuina HACK) II. Effects of Production Factors on Panicle Productivity

János Janovszky
Cereal Research Communications
Vol. 22, No. 3 (1994), pp. 211-217
Published by: Akadémiai Kiadó
Stable URL: http://www.jstor.org/stable/23783939
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effects of Production Factors on Seed Yield and Yield Components of Red Fescue (Festuca rubra L. ssp. genuina HACK) II. Effects of Production Factors on Panicle Productivity
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Abstract

The studies of effects of production factors on panicle productivity of red fescue resulted in the following conclusions: 1. The nutrient supply has a primary role in the increase of number of flowers in the panicle influencing the potential yield and consequently the panicle productivity. The highest values of panicle productivity were reached as a result of NPK fertilization followed by NP, NK, N, PK, P and K fertilization. 2. Concerning this yield component the results also proved the determinative effect of nitrogen supply. In the productive years and as an average of the experimental years the number of seeds developed in one panicle was influenced mainly by the nitrogen. The number of seeds per panicle showed significant increase up to the level of 180 kg/ha N effective agent. 3. The effect of phosphorus and potassium fertilizers was considerably lower than that of the nitrogen fertilizer. The number of seeds per inflorescence was not increased at all by the potassium fertilizer, and by phosphorus fertilizer it was increased reliably only at a dose of 120 kg/ha. 4. The highest values of panicle productivity were obtained as a result of the nitrogen fertilizer applied in two doses (1/3 early autumn and 2/3 early spring) based on the average of the three years and all the other factors. 5. The result of interrelationship "amount of nitrogen effective agent x grass stand density" referred to the fact that the medium (180 kg/ha) and high (270 kg/ha) doses of nitrogen fertilizer counterbalance the depressive effect of the higher grass stand densities (stripe sowing) experienced in the controls and at low N doses. 6. The results of the experiments showed the unexpected, moderate effect of the adequate water supply (irrigation). The irrigation did not influence considerably the number of flowers and seeds per inflorescence, thus the percent of fecundation was not influenced either.

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