铺设反光膜和林下种草对山地油橄榄光合有效辐射的影响  

Effects of Laying Reflective Film and Planting Understory Grass on Photosynthetically Active Radiation of Olea europaea in Mountainous Area

作　　者：白蕾 杨斌 金辉亮 滕保琴 罗勤学 BAI Lei;YANG Bin;JIN Huiliang;TENG Baoqin;LUO Qinxue(Forestry Science and Technology Promotion Station of Gansu Province,Lanzhou 730030,China;Olive Oil of Longnan Xiangyu Development Co.,Ltd.,Longnan Gansu 746000,China)

机构地区：[1]甘肃省林业科技推广站,甘肃兰州730030 [2]陇南市祥宇油橄榄开发有限责任公司,甘肃陇南746000

出　　处：《甘肃林业科技》2024年第4期26-31,共6页Journal of Gansu Forestry Science and Technology

基　　金：中央财政林业科技推广示范项目“陇南油橄榄提质增效栽培技术示范推广”([2022]ZYTG005)。

摘　　要：以陇南山地油橄榄种植园为研究对象,通过铺设反光膜和林下种草两种模式,研究其对油橄榄树冠层光合有效辐射(PAR)的影响,以期有效提升山地栽培油橄榄的光合效率。结果表明:(1)铺设反光膜主要补充下层和中层PAR,在树冠内PAR值表现为铺设反光膜>CK>林下种草,铺设反光膜分别比CK和林下种草提高了31.73%和66.75%。(2)林下种草对树冠上层的PAR影响有限,在光照弱和光照中时,随着冠层的升高林下种草的PAR降低幅度越小;在光照强时主要削弱中层PAR(45.32%)。(3)铺设反光膜对陇南山地油橄榄园PAR有明显的补充作用,冠层越低补光作用越明显。在有山体遮挡的情况下,铺设反光膜的PAR略高于对照,但较无遮挡时作用有所降低。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.

关 键 词：油橄榄 反光膜 林下种草 光合有效辐射 

分 类 号：S565.7[农业科学—作物学]