Sediment greenhouse gas emission reduction or alkalinity improvement method

The invention relates to the technical field of carbon emission reduction, and discloses a sediment greenhouse gas emission reduction or alkalinity improvement method. According to the application of the calcium sulfate or the hydrate thereof in emission reduction or alkalinity improvement of the greenhouse gases of the sediments, the calcium sulfate or the hydrate thereof is desulfurized gypsum, resource utilization of the desulfurized gypsum can be achieved, and environmental pollution is reduced; the calcium sulfate or the hydrate thereof can effectively inhibit the generation rate of the sediment greenhouse gas and promote the absorption of the greenhouse gas; ca < 2 + > generated by dissolution can accelerate Na < + > release and neutralize the pH value of the sediment, # imgabs 0 can be subjected to a replacement reaction with # imgabs 1 # and # imgabs 2 # in the sediment, and the alkalization degree is reduced; meanwhile, the release of Ca < 2 + > is beneficial to plant growth, and the fertility of sed