LED光照强度对高羊茅生长及生理特性的影响  

Effects of the light intensity of LEDs on the growth and physiological characteristics of tall fescue

作　　者：丁孝伟 陈佳宝 谢昊鹏 梁小红 韩烈保[1] 陈雨峰 张浩男 朱智远 张萌 贾辰雁 DING Xiaowei;CHEN Jiabao;XIE Haopeng;LIANG Xiaohong;HAN Liebao;CHEN Yufeng;ZHANG Haonan;ZHU Zhiyuan;ZHANG Meng;JIA Chenyan(Turfgrass Research Institute,Beijing Forestry University,Beijing 100083,China;College of Forestry,Beijing Forestry University,Beijing 100083,China;Institute of Ecological Protection and Restoration,Chinese Academy of Forestry,Beijing 100091,China;Inner Mongolia M-Grass Ecology and Environment(Group)Co.,Ltd.,Hohhot 010010,Inner Mongolia,China)

机构地区：[1]北京林业大学草坪研究所,北京100083 [2]北京林业大学林学院,北京100083 [3]中国林业科学研究院生态保护与修复研究所,北京100091 [4]内蒙古蒙草生态环境(集团)股份有限公司,内蒙古呼和浩特010010

出　　处：《草业科学》2024年第11期2594-2603,共10页Pratacultural Science

基　　金：国家自然基金面上项目(31971770)。

摘　　要：为通过LED光源在适宜光照强度下培育高质量草坪,本研究以高羊茅(Festuca arundinacea)品种‘交战4’为试验材料,在LED红蓝光源下设置100(L100)、150(L150)、200(L200)、250(L250)、300(L300)、350(L350)μmol·(m^(2)·s)^(-1)的光照强度处理,研究不同光照强度对高羊茅形态建成、生理特性和电能利用效率的影响。结果表明,光照强度低于200μmol·(m^(2)·s)^(-1)时,明显抑制高羊茅形态建成、营养物质积累和抗氧化能力。随着光照强度的增加,高羊茅归一化植被指数和色泽逐渐提升,根系生长更为强壮,有利于高羊茅的生物量积累和抗氧化能力增强。但当光照强度增加至300μmol·(m^(2)·s)^(-1)时,光照强度对高羊茅生长的促进效果减弱。利用LED培育高羊茅电能利用效率在L350处理显著低于L100、L150、L300处理。回归分析显示,在光照强度为291.25μmol·(m^(2)·s)^(-1)时[接近300μmol·(m^(2)·s)^(-1)],高羊茅归一化植被指数最大。因此,综合认为选择光照强度为300μmol·(m^(2)·s)^(-1)时,可以满足高羊茅的正常生长,保持较高的草坪质量,减少能源的消耗。To determine the optimal conditions for cultivating high-quality lawn under suitable light intensity using an LED light source,the effects of different light intensities on the morphology,physiological characteristics and power utilization efficiency of tall fescue were studied.To this end,tall fescue variety‘Battle 4’was used as the test material,with light intensity treatments of 100(L100),150(L150),200(L200),250(L250),300(L300),and 350(L350)μmol·(m^(2)·s)^(-1) under a red and blue LED light source.The results showed that when the light intensity was lower than 200μmol·(m^(2)·s)^(-1),the morphology,nutrient accumulation,and antioxidant capacity of tall fescue was significantly inhibited.As the light intensity increased,the normalized difference vegetation index(NDVI)and color of tall fescue gradually increased.In addition,root growth became stronger,which is conducive to biomass accumulation and the antioxidant capacity of tall fescue.However,when the light intensity was increased to 300μmol·(m^(2)·s)^(-1),the effect of light intensity on the growth of tall fescue was weakened.The high power utilization efficiency of using LED cultivation was significantly lower in L350 processing than that of L100,L150,and L300.Regression analysis indicated that the normalized vegetation index of tall fescue was highest at a light intensity of 291.25μmol·(m^(2)·s)^(-1)[close to 300μmol·(m^(2)·s)^(-1)].These results suggest that a light intensity of 300μmol·(m^(2)·s)^(-1) is sufficient to ensure the normal growth of tall fescue and maintain high turf quality while reducing energy consumption.

关 键 词：高羊茅 发光二极管 光照强度 根系特征 草坪质量 生理特性 电能利用效率 

分 类 号：S688.4[农业科学—观赏园艺]