Publication Date

1985

Location

Kyoto Japan

Description

n Kyushu, the southernmost island of Japan, very intensive cattle raising are being done mostly in the lowland areas by drylot-feeding system. A rotation system of forage maize (Zea mays) followed by Italian ryegrass (Lolium multiflorum. IR) in a year is the most popular of all for maximizing and stabilizing dry matter (DM) production there (Ibaraki, 1985). A series of field trials to select suitable cul ti vars ( cv.) and cultural managements in maize and IR were conducted on the volcanic ash soil at Kyushu Nat. Agr. Exp. Stn in Kumamoto in 1980-4. For stable DM production of forage maize in a summer season, medium-maturing (M) hybrid maize sown between April and early June at density of about 80,000 plants/ha with medium rate of fertilizers was recommended. Similarly medium-maturing (M) cv. of IR sown in September-October was suitable as a winter crop.

The maize (M) - IR (M) system was proven to be of productivity higher than 30 t DM/ha/year next to sorghum (Sorghum vulgare) - IR system which was supposedly not favorable for feeding high-producing cows because of the low total digestible nutrients (TDN) content of sorghum. To avoid the occurrence of continuous rotation injury owing to single repetition of forage maize - IR system, it is desirable to establish two-year four-cropping system by sorghum, tropical grasses in summer, and oats, barley and legumes in winter besides maize and IR.

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Yearly Forage Crop Rotation Systems in the Lowland Areas of Kyushu, Japan

Kyoto Japan

n Kyushu, the southernmost island of Japan, very intensive cattle raising are being done mostly in the lowland areas by drylot-feeding system. A rotation system of forage maize (Zea mays) followed by Italian ryegrass (Lolium multiflorum. IR) in a year is the most popular of all for maximizing and stabilizing dry matter (DM) production there (Ibaraki, 1985). A series of field trials to select suitable cul ti vars ( cv.) and cultural managements in maize and IR were conducted on the volcanic ash soil at Kyushu Nat. Agr. Exp. Stn in Kumamoto in 1980-4. For stable DM production of forage maize in a summer season, medium-maturing (M) hybrid maize sown between April and early June at density of about 80,000 plants/ha with medium rate of fertilizers was recommended. Similarly medium-maturing (M) cv. of IR sown in September-October was suitable as a winter crop.

The maize (M) - IR (M) system was proven to be of productivity higher than 30 t DM/ha/year next to sorghum (Sorghum vulgare) - IR system which was supposedly not favorable for feeding high-producing cows because of the low total digestible nutrients (TDN) content of sorghum. To avoid the occurrence of continuous rotation injury owing to single repetition of forage maize - IR system, it is desirable to establish two-year four-cropping system by sorghum, tropical grasses in summer, and oats, barley and legumes in winter besides maize and IR.