Effects of different light qualities on the growth and photosynthetic properties of potatoes
[Objective]To study the regulatory laws of different light qualities on the growth and devel-opment of potatoes.[Method]In this article,the potato variety'Favorita'was used as an experimental mate-rial to study the effects of white light,far red light,red light,green light,blue light and ultraviolet light on the growth and photosynthetic characteristics of potato plants.[Result]Different light qualities have differ-ent regulatory effects on plant growth.Under red light treatment,plant height,root surface area,chlorophyll content and individual tuber weight increased by 37.20%,35.54%,18.82%and 112.69%,respectively,compared to white light.The number of tubers per plant decreased by 50.70%compared to white light.Un-der blue light treatment,root surface area,transpiration rate,number of tubers per plant,weight of individual tubers and yield per plant increased by 18.98%,17.02%,25.91%,65.67%and 108.11%,respectively,compared to white light.Under green light treatment,stem diameter,net photosynthetic rate,number of tu-bers per plant and yield per plant decreased by 20.45%,6.44%,22.56%and 22.45%,respectively,com-pared to white light.Under far-red light treatment,root length,root surface area,chlorophyll content,net photosynthetic rate and transpiration rate decreased by 24.73%,30.91%,26.47%,10.67%and 34.75%.Under UV light treatment,plant height,root area,chlorophyll content,net photosynthetic rate and transpira-tion rate decreased by 21.72%,20.75%,21.18%,7.78%and 15.60%,respectively,compared to white light.[Conclusion]According to the comprehensive evaluation of principal component analysis,blue light can effectively promote potato growth and improve photosynthetic efficiency.In actual production,blue light irradiation can improve the production efficiency of potato seed potatoes.