Zhejiang Province, charged with the task of opening “an important window”, should take the lead in the implementation of the national “carbon peak, carbon neutral” strategy. The intention of this study is to start from the intersection of economics and geography, and on the basis of GIS analysis, use the spatial Dubin model to study the spatio-temporal evolution trend, key influencing factors, and spatial spillover effects of forest carbon sequestration in 72 districts and counties of Zhejiang Province from 2000 to 2020, to provide a theoretical and practical reference for how to formulate regional synergistic forest sink enhancement measures and help Zhejiang achieve the goal of carbon neutrality. The conclusions are as follows: (1) From 2000 to 2020, the overall growth of forest carbon sequestration in all regions and counties of Zhejiang Province was relatively high, but the regional differences were large. The concentration center and range moved to the southwest. (2) If the spatial effect is considered, the increase of per capita GDP, road density, and deforestation will reduce the forest carbon sequestration, and the conservation of ecological public welfare forests will have a significant positive relationship with the forest carbon sequestration.

As the fundamental operational units of agricultural production, farmers make production decisions based on the principle of household income maximization. This study draws on data from a micro-level survey of rice farmers conducted in Jiangxi Province from November 2022 to August 2023, which yielded 1014 valid observations to examine two rice cultivation patterns—double-cropping rice (DCR) and rice–rapeseed rotation (RRR)—in order to analyze the economic effects of farmers’ cultivation choices on rice production. Additionally, a heterogeneity analysis is performed, taking into account labor force size, intergenerational differences, and operational scale. The results indicate that (1) farmers adopting the RRR pattern experience a significant increase in per-unit-area profit, thereby enhancing household income, with gains ranging from 16.95% to 153.20%. (2) The heterogeneity analysis reveals that the economic effects of labor availability, generational differences, and operational scale are not uniform. Ample labor resources strongly support rice production; older-generation farmers’ intensive farming methods are more suitable for RRR, and land expansion is constrained by scale thresholds. Based on these findings, it is recommended to optimize the allocation of production factors such as land and labor, and to guide farmers in adapting their rice cultivation strategies accordingly.