Use patterns of ecological agriculture and biological carbon sinking extension in marsh wetland

To explore the technology of the biological carbon sinking extension and the patterns of the carbon sinking type use in the marsh wetland, the degradation soda saline-alkali reed marsh wetland of Niuxintaobao reed farm, Da'an City, Jilin Province was chosen as the studied object. In 2006-2011, during fishes, shrimps and crab were artificially enhanced and released, the degradation reed vegetation was restored and the high carbon sinking hydrobiology community was built. The technology of the biological carbon sinking extension and the use patterns of the carbon sinking type in the marsh wetland were experimented. The results showed that the biomass of the major carbon sinking organisms from the experimental land was 3 364.38 kg/hm2·a, and increased by 158.20% than the firsthand marsh wetland, i.e. increased by 20.89% per year. The capability of the biological carbon sinking from the experimental land was 176.42 kg/hm2 ·a, and increased by 256.98% than the firsthand marsh wetland, i.e. increased by 35.01% per year. The economic benefit from the experimental land was 744 Yuan/hm2·a, and increased by 215.25% than the firsthand marsh wetland, i.e. increased by 25.81% per year. The pattern for enhancement and releasing is not an adverse effect on the productivity of submersed macrophytes and zoobenthos from the marsh wetland, and it is harmless for the ecosystem. The "reed-fish-shrimp-crab" model in the soda saline-alkali reed marsh wetland built by the experiment is a pattern of the biological carbon sinking extension for marsh wetlands, and it is also an eco-agriculture model with the function of carbon sinking for the sustainable use of marsh wetlands. The results can provide a reference for the study of biological carbon sinking extension and carbon sinking type use in marsh wetlands or other type of wetlands.