Study On The Green Quantity Of Seven Common Shrub Species In Baotou

Seven common shrub species in Baotou city were studied in this paper,select multiple sample sites,the morphological indexes such as plant height,crown width,leaf curtain thickness and leaf area of each tree species in the sample plot were measured on the spot.By observing plant morphology and consulting data,determine the volume equation of the plant canopy,the three-dimensional green content of each shrub was calculated.Then the regression analysis of the three-dimensional green quantity and each morphological index was carried out by SPSS data analysis software,and the regression equation of three-dimensional green quantity was obtained.The main conclusions are as follows:(1)By calculating the three-dimensional green content of seven species:Syringa wolfii Schneid,Rose,Sorbaria sorbifolia(L.)A.Br,Cotoneaster multiflorus Bge.,Forsythia suspensa,Prunus × cistena N.E.Hansen ex Koehne,Sabina Vulgaris Antoine,it can be concluded that within a certain range of crown width,the average green quantity of 8 shrubs is as follows:Cotoneaster multiflorus Bge.(10.04 m3)>Rose(7.47 m3)>Syringa wolfii Schneid(6.24 m3)>Forsythia suspensa(3.49 m3)>Sorbaria sorbifolia(L.)A.Br(2.57 m3)>Prunus × cistena N.E.Hansen ex Koehne(1.02 m3)>Sabina Vulgaris Antoine(0.11 m3).The amount of green in different tree species was also different due to different factors such as plant height,crown width and leaf curtain thickness.(2)The leaf area index of seven tree species including Syringa wolfii Schneid,Rose,Sorbaria sorbifolia(L.)A.Br,Cotoneaster multiflorus Bge.,Forsythia suspensa,Prunus× cistena N.E.Hansen ex Koehne,and Sabina Vulgaris Antoine was calculated.It can be concluded that the order of average leaf area of seven shrub species within a certain crown width is:Syringa wolfii Schneid(28.12 cm2)>Forsythia suspensa(8.60 cm2)>Prunus × cistena N.E.Hansen ex Koehne(7.51 cm2)>Cotoneaster multiflorus Bge.(4.42 cm2)>Sorbaria sorbifolia(L.)A.Br(4.05 cm2)>Rose(3.48 cm2)>Sabina Vulgaris Antoine(2.85 cm2).The order of average leaf area index is:Syringa wolfii Schneid(4.47)>Rose(4.22)>Forsythia suspensa(2.21)>Sabina Vulgaris Antoine(1.86)>Sorbaria sorbifolia(L.)A.Br(1.72)>Prunus × cistena N.E.Hansen ex Koehne(1.30)>Cotoneaster multiflorus Bge.(0.70).(3)SPSS data analysis software was used to analyze the regression analysis of the three-dimensional green quantity of seven shrubs and each morphological index,and the regression equation of the three-dimensional green quantity of seven plants was obtained.(4)Through the analysis of three-dimensional green quantity,plant height,crown width and leaf canopy thickness of seven plants,it was found that there was a positive correlation between three-dimensional green quantity and plant height,crown width and leaf canopy thickness,especially the correlation between plant height and canopy width.(5)Through the analysis of three-dimensional green quantity and leaf area index of seven plants,it is found that there is a positive correlation between three-dimensional green quantity and leaf area index of seven plants.