Growth of Leucaena diversifolia (Schlecht.) Benth. seedlings in two grassland soils as affected by rhizobium inoculation, fertilization and liming [Philippines].
1987
Dejan M.V.P.
Of the three Rhizobium isolates (CB81, L6, Ld9) screened for effectiveness, CB81, an isolate from Australia was the best strain for L. diversifolia. Rhizobium inoculation of L. diversifolia seedlings with CB81 strain in unlimed Garita and Puting Lupa grassland soils markedly increased all parameters except for root/shoot ratio. On the other hand, Rhizobium inoculation in limed Garita and Puting Lupa grassland soils improved nodulation and nutrient uptake but not nutrient content, height, dry matter and root/shoot ratio. Fertilization of L. diversifolia seedlings with complete fertilizer (14-14-14) generally have a marked increase in overall seedling growth. Fertilization at a rate of 50 kg/ha produced more vigorous seedlings than either 100 kg/ha or control. Fertilization alone or inoculation alone generally resulted in marked increase in overall growth of L. diversifolia seedlings, but when these two variables were combined they produced significantly better seedlings than fertilization or inoculation alone in both soil types. Seedlings grown in Garita grassland soil performed better than seedlings grown in Puting Lupa in terms of the overall growth and even in the absence of lime. On the other hand, seedlings grown in Puting Lupa grassland soils generally performed better when amended with lime (CaCO3).
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