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- The Response of Albizia Falcataria (L.) fosb. to Rhizobium Inoculation...
The Response of Albizia Falcataria (L.) fosb. to Rhizobium Inoculation in Different Soil Tyoes
Thesis Abstract:
Two studies were conducted to test the effectivity of four Rhizobium isolates on Moluccan sau (Albizia falcataria).
In study 1, three provenances were inoculated and grown in three soil types. In study 2, varying urea and lime levels were applied to Luisiana soil to grow the West Java (Indonesia) provenenance inoculated with the subject isolates: A14 and A18 (Makiling) and Alfa1 and Alfa2 (Mindoro), with basal application of 90 kg/ha of P2O5 and 60 kg/ha K2. Both studies were set up with split-split plot design in complete randomizing design (CRD) and were harvested four months after sowing. To evaluate the responses, height, diameter, total biomass, root/shoot ratio, nodulation, nitrogen (N), and N uptake were used as the parameters.
Results showed taht in both studies, the inoculated seedlings were generally more vigorous and greener than the uninoculated ones. The Alfa2 isolate performed the best without soil amendments, while Alfa1 was the best isolate in Luisiana soil with N-fertilization and calcium carbonate (CaCo3) application. Consistently, the second-best performing isolate in both studies was A14.
The West java provenance gave significantly higher values in terms of seedling growth than either Palawan or Bislig provenance. Luisiana (sandy clay loam) had grown the best seedlings compared to Puting Lupa or Carranglan soil (both clay loam). The combination of the highest time level (0.4840 g CaCo3) and the lowest urea level (0.25 g) yielded the tallest seedlings.