Tropical Grasslands (1989) Volume 23, 171–178

NODULATION OF LEUCAENA LEUCOCEPHALA IN ACID SOILS OF PENINSULAR MALAYSIA

WONG CHOI CHEE1, J. SUNDRAM1, R.A. DATE2 and R.J. ROUGHLEY3

1MARDI, Serdang, Malaysia
2CSIRO, Division of Tropical Crops and Pastures, 306 Carmody Road, St. Lucia, Qld 4067, Australia
3HRAS, NSW Department Agriculture, P.O. Box 581, Gosford, 2250, Australia

Abstract

Three selected strains of Rhizobium for Leucaena leucocephala were evaluated for their ability to form nodules and improve plant growth in 4 acid soils of Peninsular Malaysia. Differences between strains for plant dry weight and nitrogen yield were small, but generally yields were better for the inoculated than uninoculated treatments, especially at the initial harvest. Differences in yield between strains declined and superiority over the uninoculated-nil nitrogen control decreased with successive harvests. The majority of nodules at the initial harvest was formed by the inoculum strains. Strain MS111 accounted for more nodules and was more persistent than either TAL1145 or CB81 at all 4 sites, but the proportion of nodules formed by the inoculum strain was affected by soil type. Strains were least successful at Jeram Pasu (entisol) and CB81 virtually failed at Sungai Baging (spodosol).

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