关键词: 宅基地复垦模式, 北方滨海盐碱化地区, 复垦效果, 综合评价

Abstract: In order to ensure the quality of cultivated land after the reclamation of rural residential land, the northern coastal salinization area is taken as the research area, and the representative Tianjin Gegu Town of Jinnan District is selected to carry out the research of rural homestead reclamation mode. Based on four kinds of reclamation techniques, such as water and salt regulation, soil function reconstruction, biological selection and micro-regional soil improvement, three integrated reclamation modes were proposed. Soil salinity, organic matter, alkali-soluble nitrogen, available phosphorus and available potassium were selected as evaluation indexes. The fuzzy comprehensive evaluation method based on principal component analysis was used to evaluate the effect layering of different reclamation modes. The results showed that the soil nutrients in the layers before reclaimation were moderately low, and the soil nutrients in the near ground were worse than those in the lower layer. After one year of reclamation, the reclaimed integrated model 1 improved the organic matter, alkaline nitrogen and available potassium; the mode 2 improved the evaluation indexes in the soil; the mode 3 improved the salt content in the soil. The three integrated reclamation modes increased the content of organic matter, alkali nitrogen and available potassium in various layers of soil, reduced the salt content in the soil, and imporved the soil nutrients to a high level. The study can provide technical support and theoretical basis for the reclamation of homesteads in the northern coastal salinization area.

Key words: homestead reclamation modes, northern coastal salinization area, reclamation effect, comprehensive evaluation