多年栽培蔬菜作物的土壤，经过长时间耕作后，往往会出现蔬菜生长不良，产量不稳等现象。有时气候条件适宜，栽培管理得当，蔬菜生长正常，一旦遇到多湿或干旱等不良的环境条件，蔬菜生长就明显变差，这就是所谓的菜园地的老化。根据对我市几个主要蔬菜基地的调查分析，总结出 After many years cultivation of vegetable crops, soil often shows poor growth of vegetables and unstable yields. Occasionally suitable climatic conditions, cultivation and management properly, vegetables grow normally, in case of adverse conditions such as wet or drought, the growth of vegetables significantly worse, this is the so-called garden of aging. According to the survey of several major vegetable bases in our city, concluded