基于地球化学调查的天津市西青区农用地适宜性评价及种植建议

Evaluation of suitability of agricultural land and planting suggestions in Xiqing District, Tianjin based on geochemical survey

中文关键词: 地球化学调查  适宜性评价  农用地  西青区

英文关键词: geochemical surveys  suitability evaluation  agricultural land  Xiqing District

中文摘要:

      本研究以天津市西青区农用地为研究对象，根据地球化学调查成果，结合西青区土地质量特征，开展玉米、棉花、蔬菜、沙窝萝卜的农用地种植适宜性评价。选取表层土壤质地、土体构型、土壤盐渍化程度、土壤养分、排水条件、灌溉保证率、土壤毒性共 7个评价因子，名优特农作物适宜性评价增加与其品质相关的土壤特征指标。在对每个评价单元分别评定每一项土地适宜等级后，采用极限条件法加以综合，评出总的土地适宜等级。结果显示:玉米种植适宜性以中度适宜和基本适宜为主，约 180.15 km2；棉花种植适宜性以中等适宜和基本适宜为主，约 214.49 km2；蔬菜种植适宜性以基本适宜和不适宜为主，基本适宜区面积约 127.88 km2；沙窝萝卜在辛口镇和杨柳青镇南部适宜种植，适宜区面积约 36.23 km2。灌溉水资源是制约西青区农业发展的最重要限制性因素。研究成果可为相关部门履行土地资源管理、土地利用规划、农业种植结构调整等提供科学依据。

英文摘要:

      This thesis takes the agricultural land in Xiqing District, Tianjin as the research object. Based onthe achievements of geochemical surveys and combined with the characteristics of land quality in Xiqing District,an evaluation of the suitability of agricultural land for growing crops such as corn, cotton, vegetables, and Shawo rad-ishes is carried out. Seven evaluation factors are selected, including the texture of the surface soil, the soil body con-figuration, the degree of soil salinization, soil nutrients, drainage conditions, the irrigation guarantee rate, and soiltoxicity. For the suitability evaluation of famous, excellent, and special crops, soil characteristic indicators related totheir quality are added. After each evaluation unit has been assessed for its land suitability grades respectively, thelimiting condition method is adopted for comprehensive evaluation to determine the overall land suitability level.The results show that the suitability of corn cultivation is mainly at the moderate and basic suitability levels, cover-ing an area of approximately 180.15 km2. The suitability of cotton cultivation is mainly at the moderate and basicsuitability levels, with an area of about 214.49 km2. The suitability of vegetable cultivation is mainly at the basicsuitability and unsuitability levels, and the area of the basically suitable area is approximately 127.88 km2. Shawo radishes are suitable for cultivation in Xinkou Town and the southern part of Yangliuqing Town, and the suitablearea is about 36.23 km2. Irrigation water resources are the most important restrictive factors restricting the agricul-tural development of Xiqing District. The research results can provide a scientific basis for relevant departments toperform tasks such as land resource management, land use planning, and adjustment of the agricultural plantingstructure.