Conclusions are reached as follows: (1) The total carbon sink of the farmland ecosystem in coastal China was zigzagging upward since 1981, and the total carbon emission climbing rapidly.

• 二者相比，碳排放明显低于碳吸收，但由主要途径农业投入导致的间接碳排放的增长速度(94%25)超过了作物生育期碳吸收的增长速度(44%25)。