Tropical Grasslands (1985) Volume 19, 68–73

POTENTIAL OF LEUCAENA GROWN FOR FORAGE PRODUCTION IN THE RYUKYU ISLANDS, SUB-TROPICAL JAPAN

YUKIO KITAMURA

Okinawa Branch, Tropical Agriculture Research Center, Maesato, Ishigaki, Okinawa 907-01, Japan

Abstract

Total and edible (leucaena leaves and soft stems + grass) annual dry matter yields obtained from leucaena grown in mixtures with napier grass were higher than those with leucaena/guinea grass mixture and higher still than leucaena alone. Edible dry matter yields increased with closer leucaena row spacings and taller heights of cutting reaching an annual maximum of 28 t ha-1 for leucaena/napier grass, and these yields influenced digestible dry matter and nitrogen yields.
The mixed forage was of moderate quality judged by IVDMD and N concentration.
It would appear that a leucaena/napier grass pasture with narrow leucaena row spacings and longer regrowth period could provide a useful alternate forage system for the Ryukyu Islands.

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