where, S stands for the standard deviation; Xi is the
sample card’s droplet deposition density, the coverage
rate and particle size, respectively;X is the average value
of Xi; n is the total number of sampling cards.
3) Leaf area index (LAI)
CI-110 plant canopy analyzer with analysis software
was used for measuring the LAI of trees with different
types (natural round and open center shapes).
4) Statistical analysis
EXCEL software was used for data analysis and
diagrams drawing. SPSS17.0 software was used for the
variance and correlation analysis.