Optimization of mineral nutrition for perennial ryegrass seed production
2003
Bumane, S. (Latvia Univ. of Agriculture, Skriveri (Latvia). Skriveri Research Centre) | Bughrara, S.S.
The efficiency of N fertilizer used in perennial grass seed production in Latvia may affect the nitrogen rate, grass species, and soil type. Grass seed production is a very important factor for farmer's income in Latvia. The objective of this research was to obtain productivity results for perennial ryegrass (Lolium perenne L.) at different rates of mineral nutrition. Field experiments were carried out on sod-podzolic sandy loam soil. The following mineral fertilizer rates used: N and P2O5, each O, 30, 60, 90, 120, K2O - O, 40, 80, 120, 160 kg ha*[-1). Productivity of biomass and seeds was dependent on the following variables: genetic characteristics of particular cultivars, mineral fertilizer rates, and meteorological conditions of the growing period. This research examines the effects of varying mineral fertilizer rates on dry matter and seed yields by using perennial ryegrass cultivar 'Spidola' and relies on the local weather conditions. The average biomass yield was 2.21-6.07 t ha*[-1) (on dry matter basis), while the average seed yields were 255-672 and 136-390 kg ha*[-1) in the 1st and 2nd year stand, respectively.
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