Investigating the carbon flux in orchard ecosystems is crucial for assessing agroecosystem productivity and optimizing management practices. We measured and estimated carbon fluxes (gross primary productivity, GPP; ecosystem respiration, Re; and net ecosystem exchange, NEE) and environmental variables in a seven-year-old kiwifruit orchard over two years. Our results showed that diurnal carbon fluxes exhibited bell-shaped patterns, peaking between 12:30 and 15:30. Daily carbon fluxes exhibited a seasonal trend, characterized by an increase followed by a decrease. The average daily GPP, Re, and NEE values were 6.77, 4.99, and -1.79 g C m(-2) d(-1 )in 2018, and 5.88, 4.78, and -1.10 g Cm-2 d(-1) in 2019, respectively. The orchard sequestered -444.25 g C m(-2) in 2018 and -285.77 g C m(-2 )in 2019, which accounted for 26.4% and 18.6% of GPP, respectively. Diurnal GPP and NEE were significantly influenced by photosynthetically active radiation (PAR), with direct path coefficients of 0.75 and 0.88 (p < 0.01), while air temperature (T-a ) significantly affected GPP and NEE through PAR, with an indirect path coefficient of 1.12 for both. PAR had a similar effect on daily GPP and NEE, while both were indirectly influenced by soil temperature (Ts) at a 5 cm depth and vapor pressure deficit (VPD). R-e was primarily impacted by VPD, with a direct path coefficient of 0.64 (p < 0.01), while T-a and the concentration of air carbon dioxide (CCO2) significantly affected GPP through VPD, with indirect path coefficients of 0.82 and -0.80. The leaf area index (LAI) and soil water content (SWC) at a 20 cm depth exhibited a significant correlation with carbon fluxes during the vigorous growing period.