红蓝光光强对多年生黑麦草生长产量与品质的影响  

Effects of red and blue light intensities on the growth,yield,and quality of perennial ryegrass

作　　者：陈艳琦 刘家源 刘文科[1] 王奇 CHEN Yanqi;LIU Jiayuan;LIU Wenke;WANG Qi(Institute of Environment and Sustainable Agricultural Development,Chinese Academy of Agricultural Sciences,Beijing 100081,China)

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,北京100081

出　　处：《草业科学》2023年第2期502-510,共9页Pratacultural Science

摘　　要：设施牧草生产是解决牧草产能不足的有效途径,为了探明人工光植物工厂中多年生黑麦草(Lolium perenne)生产的适宜光强,研究了LED红蓝光光强[150、250、350、450、550μmol·(m^(2)·s)^(-1)]对多年生黑麦草产量及叶绿素、可溶性糖和氨基酸含量等品质特性的影响。结果表明,光强对黑麦草的产量影响较大,随着光强增大,产量提升。光强影响了叶绿素b含量和总叶绿素含量。第2次刈割时光强与可溶性糖、氨基酸和半胱氨酸含量以及DPPH自由基清除率呈极显著或显著正相关关系(P <0.05)。两次刈割中450μmol·(m^(2)·s)^(-1)光强下单株分蘖数分别为7.6和9.4,可溶性糖含量分别为13.29和8.85 mg·g^(-1),氨基酸含量为15.65和19.48 mg·g^(-1),DPPH自由基清除率分别为31.47%和24.37%。研究结果表明,LED红蓝光下高效栽培黑麦草是可行的,在红蓝比4:1条件下光强450μmol·(m^(2)·s)^(-1)较为适宜,可获得较高产量和品质。Facility forage production is an effective approach for solving the problem of insufficient forage grass production capacity.In order to establish suitable light intensity for perennial ryegrass(Lolium perenne)production in plant factory with artificial light,we examined the effects of red and blue LED light intensities[150,250,350,450,and 550μmol·(m^(2)·s)^(-1)]on the yield and the quality characteristics of the chlorophyll,soluble sugar and amino acid contents of perennial ryegrass.The results revealed that light intensity had a marked effect on yield,with increases in yield being recorded in response to an increase in light intensity.Light intensity was also found to influence the contents of chlorophyll b and total chlorophyll.At the second cutting,we detected significant positive correlations between light intensity and soluble sugar,amino acid,and cysteine contents,as well as DPPH free radical scavenging activity.At a light intensity of 450μmol·(m^(2)·s)^(-1),we recorded 7.6 and 9.4 tillers per plant for the first and second cutting,soluble sugar contents were 13.29 and 8.85 mg·g^(-1) and amino acid contents were 15.65 and 19.48 mg·g^(-1),respectively,and the DPPH free radical clearance rate was 31.47%and 24.37%,respectively.On the basis of these findings,we established that high-quality ryegrass can be efficiently cultivated under red and blue LED light,with the optimal production conditions being a light intensity of 450μmol·(m^(2)·s)^(-1) and red to blue ratio of 4:1.

关 键 词：LED 人工光植物工厂 多年生黑麦草 刈割 叶绿素 可溶性糖 氨基酸 

分 类 号：S543.6[农业科学—作物学]