一、项目缘起土壤是陆地上具有肥力并能够生长植物的疏松表层。土壤是一个复杂的物质系统,它具有供应和协调植物生长发育所需的水分、养分、部分空气和热量的功能,是生态系统中物质与能量交换的重要场所。土壤改良是针对土壤的不良质地和结构,采取相应的物理、生物或化学措施,改善土壤性状,提高土壤肥力,从而增加作物产量,以及改善人类生存土壤环境的过程。学生在日常生活中经常接触到溶液的酸碱性问题,也对一些常见的盐的使用有所体会。把这些问题安排在土壤改良这样一个非常有意义的背景下展开,可以增强 First, the project origin Soil is fertile and able to grow plants on the ground loose surface. Soil is a complex material system. It has the function of supplying and coordinating the water, nutrients, part of air and heat necessary for plant growth and development, and is an important place for the exchange of matter and energy in the ecosystem. Soil improvement is aiming at the poor texture and structure of soil, taking appropriate physical, biological or chemical measures to improve soil properties, improve soil fertility, increase crop yield, and improve the human environment. Students often come into contact with acid-base problems in their daily lives, as well as some common salt uses. Setting these issues in a very meaningful context of soil improvement can be enhanced