National Semi-arid Agricultural Technology Research Center Shijiazhuang 050051 China;
Institute of Agriculture Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 China;
National Semi-arid Agricultural Technology Research Center Shijiazhuang 050051 China;
National Semi-arid Agricultural Technology Research Center Shijiazhuang 050051 China;
National Semi-arid Agricultural Technology Research Center Shijiazhuang 050051 China;
Hebei Province Environmental Monitoring Center Shijiazhuang 050072 China;
Foliar spray; Facility fruit vegetables; Accumulation of heavy metals; Impact;