Effects of Fertilization and Dry-Season Irrigation on Litterfall Dynamics and Decomposition Processes in Subtropical Eucalyptus Plantations

Nutrient management in Eucalyptus plantations is critical for wood production and sustainable development. The biogeochemical mechanisms are not fully understood due to changes the spatiotemporal pattern of precipitation plantation management. nutrients released from litterfall important sources soil nutrition. We measured seasonal various types proportions their urophylla × E. grandis under compound fertilization, dry-season irrigation, a combined fertilization irrigation treatment. Our results showed that increased aboveground biomass annual (except leaf), peak occurred rainy season. found decomposition rates leaf were significantly higher than twig, which mainly controlled by stoichiometric characteristics, followed enzyme activity (?-glucosidase, urease, polyphenol oxidase). Fertilization decreased carbon: nitrogen ratio phosphorus litter, activities, accelerates litter nutrient release. Dry-season only affected proportion potassium changing ratio. accelerated cycle enhance compensatory growth. These help comprehend effects forest on dynamics processes with drought.