Publication Date

1989

Description

Italian ryegrass (Lolium multiflorum Lam. var. Italicum) is native to the Po valley. Persistent populations of this species represent the main grass component of the irrigated permanent meadows in this area (Rotili et al., 1985). The subspecies Ital­icum (biannual, non alternative) and Westerwoldicum (annual, alternative) are at present the most important cultivated grasses in Italy, and are grown either as component in the poliphytic meadows or as catch crop, followed by maize for silage or soybean. Lolium multiflorum is considered of great interest as forage crop in the high fertile soils of Po valley (Tana and Seb­astiani, 1981 ; Paoletti et al., 1988) for its green and dry matter production and also because of its greater potential nutritional value than other grasses (Casler, 1988). The present study was undertaken to evaluate the response in terms of dry matter yield and nutritional value, of a range of diploid and tetraploid cultivars of different origin.

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Bio-Agronomic Traits and Nutritional Value in Italian Ryegrass Varieties

Italian ryegrass (Lolium multiflorum Lam. var. Italicum) is native to the Po valley. Persistent populations of this species represent the main grass component of the irrigated permanent meadows in this area (Rotili et al., 1985). The subspecies Ital­icum (biannual, non alternative) and Westerwoldicum (annual, alternative) are at present the most important cultivated grasses in Italy, and are grown either as component in the poliphytic meadows or as catch crop, followed by maize for silage or soybean. Lolium multiflorum is considered of great interest as forage crop in the high fertile soils of Po valley (Tana and Seb­astiani, 1981 ; Paoletti et al., 1988) for its green and dry matter production and also because of its greater potential nutritional value than other grasses (Casler, 1988). The present study was undertaken to evaluate the response in terms of dry matter yield and nutritional value, of a range of diploid and tetraploid cultivars of different origin.