Study on effective utilization of perennial ryegrass with valuable nutrients, including use for meadows in the Tenpoku [Japan] region
2010
Okamoto, H., Hokkaido. Kamikawa Agricultural Experiment Station, Hamatonbetsu (Japan). Tenpoku Branch
Perennial ryegrass (Lolium perenne L., PR) is a kind of temperate grass that is cultivated in many temperate areas in the world, including Western Europe, because of its forage quality and its clear preference by dairy cows. The Tenpoku region, located in the northernmost part of Hokkaido, is a suitable area to cultivate PR because of the coolness of the summer and the abundance of snow, which protects the grass against the chill of winter. In Japan, PR has historically been used mainly for grazing. Recently, many farmers in Tenpoku have begun to use PR not only for grazing, but also for silage and hay, and there is an increasing necessity to establish a synthetic management system of PR including use for cutting. Therefore, we conducted a study to determine a suitable nitrogen fertilizing method for PR fields intended for cutting, and for integrated cutting and grazing. Secondly, we researched the forage quality and physiological characteristics including productivity, response to N, and environmental tolerance of perennial ryegrass compared with other grass species.
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