影响蔬菜产量与品质的环境因素。主要来自两方面的威胁,一方面是由于各种病原菌和虫害的猖撅,造成大面积的减产,特别严重时亦可能造成绝产。另一方面,则不是因病虫害的原因,而造成了蔬菜生长发育的异常状况,人们通常把它称之为生理病害,也即由于各种栽培环境因素的不良影响,造 Environmental Factors Affecting Vegetable Yield and Quality. The threat stems mainly from two aspects. On the one hand, it is caused by the rampancy of various pathogenic bacteria and pests. Large-scale production cuts are caused. In particularly serious cases, it may also lead to absolute production. On the other hand, it is not because of pests and diseases caused by the abnormal growth and development of vegetables, people usually call it a physiological disease, that is, due to a variety of cultivation of environmental factors adverse effects, made