Effect of simulated acid rain on the germination and early seedling growth of Betis (Madhuca betis (Blanco) MacBride), Antipolo (Artocarpus blancoi (Elmer) Merr.) and Kalantas (Toona calantas Merr. and Rolfe) in two soil types in Laguna, Philippines
2011
Carandang, V.Q., Tolentino, E.L.Jr., Cruz, R.V.O., Castillo, A.SA., Visco, R.G., Carandang, W.M. | Tolentino, E.L. Jr. | Cruz, R.V.O. | Castillo, A. SA. | Visco, R.G. | Carandang, W.M., Philippines Univ. Los Baños, College, Laguna (Philippines). Inst. of Renewable Natural Resouces
The sensitivities of Betis (Madhuca betis (Blanco) MacBride], Antipolo [Artocarpus blancoi (Elmer) Merr.] and Kalantas (Toona calantas Merr. and Rolfe) whose seeds were sown and maintained in two soil types, namely: Makiling and Pansol soils were established by examining their responses to four pH levels of simulated rain in terms of seed germination and early growth of their seedlings. Germination value and root length were not significantly affected by acidity treatment. However, height and diameter growth, sturdiness quotient, shoot, root biomass and shoot-root ratio were found significantly affected by rainfall acidity. These parameters were then considered as most useful indicators of sensitivity to acid treatment in the study area. Root length was affected by acidity treatment and soil type and regarded as less useful parameter in the study of the sensitivity of plants to acid treatment. Of the three species studied, T. calantas was observed to be the most sensitive to changes in the acidity treatment levels.The measurements obtained in all seedling growth parameters which were found to be significantly different showed more remarkable changes in the said species. With M. betis, the differences in the seedling responses to the various pH levels of simulated acid rain were found to be insignificant. Artocarpus blancoi was intermediate between T. calantas and M. betis.
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