Effect of Litter Removal and Addition on Root Exudation and Associated Microbial N Transformation in a Pinus massoniana Plantation

In forest ecosystems, variations in aboveground litter input caused by global changes, substantially alter soil N cycling. field-grown plants, few studies have directly measured root exudation rates and quantified their effects on transformations under manipulation. We transformation rate responses to manipulation a Pinus massoniana plantation, unravelled the effect of transformations. situ P. as well microbial biomass, C concentrations, activities four enzymes involved transformations, net mineralization nitrification after experimental removal addition treatments. Litter treatments had little impact enzyme (urease, hydroxylamine reductase, nitrate nitrite reductase) activity, rates. However, both increased Additionally, significantly decreased (in April 2021 annually), whereas no significant across all seasons. Furthermore, were positively associated with urease reductase activities, but negatively rate. Overall, we demonstrated that exudates may be an important physiological adjustment which trees respond changes environmental regulating underground biochemical processes. provide new evidence from for understanding potential influence inputs A strong correlation exists between transformation, shedding light dynamics rhizosphere nutrient cycling crucial maintaining ecosystem stability productivity changing conditions.