Effects of Laying Reflective Film and Planting Understory Grass on Photosynthetically Active Radiation of Olea europaea in Mountainous Area
This experiment used Longnan Olea europaea orchards in mountainous area as the research object,through two models of laying reflective film installation and planting understory grass to explore the impact of photosynthetically active radiation(PAR),in order to improve the photosynthetic efficiency of O.europaea in mountainous area.The results show that:(1)The installation of laying reflective film mainly supplemented the lower and middle layers of PAR.Among the three experimental treatments(CK,grass under trees,and laying reflective film installation),the overall PAR values were highest for laying reflective film installation,followed by CK,and then understory grass.Laying reflective film increased by 31.73％and 66.75％compared to CK and planting understory grass,respectively.(2)Understory grass had limited impact on the PAR of the upper canopy layer.When the light intensity was weak to moderate,the decrease in PAR caused by understory grass became smaller as the canopy layer increased.However,under strong light conditions,understory grass primarily weakened the PAR of the middle layer(45.32％).(3)The installation of laying reflective film had a significant supplementary effect on PAR in Longnan mountain O.europaea orchards,and the lower the canopy layer,the more obvious the light-supplementing effect.In the case of mountain shading,the PAR of laying reflective film installation was slightly higher than the control,but its effect was reduced compared to when there was no shading.
Olea europaeareflective filmunderstory grassphotosynthetically active radiation
NETL
NSTL
万方数据
