Assessment of the early growth of agarwood (Aquilaria crassna) seedlings under different sources of nutrients
Kkiu Arunakumara
, Bc Walpola, Chathura Karunatunga
https://doi.org/10.17221/104/2021-JFSCitation:Arunakumara K., Walpola B., Karunatunga C. (2022): Assessment of the early growth of agarwood seedlings (Aquilaria crassna) under different source of nutrients. J. For. Sci, 68: 1–7.
The effect of different sources of nutrients on the growth of Aquilaria crassna seedlings was assessed by raising seedlings in polybags treated with inorganic fertilizer (IF), organic fertilizer (OF) and biofertilizer (BF) either alone or in combinations. The pots were established following a completely randomized block design with eight treatments: (T1) soil without IF, OF or BF ‒ control; (T2) soil + IF; (T3) soil + OF; (T4) soil + BF; (T5) soil + IF + OF; (T6) soil + IF + BF; (T7) soil + OF + BF; (T8) soil + IF + OF + BF each replicated five times. Plant height, stem diameter, dry weight of shoots and roots, leaf area and chlorophyll index were measured six months after planting. Soil pH (H2O) and available soil P content were measured as soil parameters. The best growth performances (54.30 cm, 6.48 mm, 7.10 and 5.92 g·plant–1, 435.33 cm2 and 58 for plant height, stem diameter, shoot and root dry weight, leaf area and chlorophyll index, respectively) were recorded in T8, which also resulted in the highest available P content (18.96 mg·kg–1 soil). The lowest soil pH (H2O) value (6.02) was recorded in T7 followed by T6 (6.17). The application of IF, OF and BF as a combination could be recommended to promote the growth of Aquilaria seedlings.
biofertilizer; organic fertilizer; inorganic fertilizer; phosphate solubilizing bacteria
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