Effect Of Different Cannopy Height And Width On The Photothermal Mircroclimate And Quality Of Cabernet Sauvignon

The purpose of this study is to explore the most suitable combination of canopy height and width for grape growing areas in Ningxia,so that improve the quality of wine grapes.This experiment take 15 year old "Cabernet Sauvignon" as experimental material,using randomized block design,Analysis the"Chang" shape in different canopy height(1.2m,1.5m,1.8m)and different canopy width(0.3m,0.4m,0.5m)impact on cannopy microclimate,inner light,quality index of grape and wine.the results are as follows:1.The height and width of grape canopy had significant influence on the inner light and canopy temperature of grape.And the contribution rate of canopy to light and microclimate of vineyard,canopy width>canopy height.The inner canopy light 0.3m(width)*1.2m(height)is the most,0.5m*1.8m is minimum;the highest canopy average temperature is 0.3m*1.2m,daily average temperature minimum is 0.5m*1.8m,0.3m*1.2m;0.4m*1.2m;maximum canopy temperature difference between day and night is 0.5m*1.5m;with canopy height and width increases,the inner light,average temperature and diurnal temperature decrease.2.the height of grape canopy had significant effects on total sugar,total acid,pH and total phenolics of grape,and the width of canopy had significant effects on total sugar,total acid,pH,total phenolics,tannin,total phenolics and anthocyanin.demonstrated the contribution rate of grape quality:canopy width>canopy height.The best combination of Total sugar(high content)is 0.3m*1.2m;the best total acid(total acid content)cultivation parameters is 0.5m*1.8m;the best cultivation parameters for pH(pH minimum)is 0.3m*1.8m;the best cultivation parameters for tannin(high content)is 0.4m*.8m;the best total phenolic(high content)cultivation parameters is 0.3m*1.2m;anthocyanins(optimal anthocyanin content)cultivation parameters is 0.5m*1.5m.3.through intensity of illumination,daily average temperature and the temperature difference between day and night with grapes and Wine quality correlation studies,the light intensity can significantly increase the total sugar,total phenol,total acid,and decrease the content of tannin,anthocyanin,has little effect on the Wine.The temperature could significantly increase the total sugar,total phenols,and decrease the contents of total acid,tannin and anthocyanin in grape,which had little effect on pH.Temperature also increased tannin content and anthocyanin content in wine,and significantly decreased total acid and total phenolic content.