不同水分条件下内生真菌对野大麦生长的影响  

Effects of fungal endophytes on agronomic characteristics and yield of wild barley forage under different water gradients

作　　者：王佳岚 李春杰[1] WANG Jialan;LI Chunjie(State Key Laboratory of Grassland Agro-ecosystems/Key Laboratory of Grassland Livestock Industry Innovation,Ministry of Agriculture and Rural Affairs/Engineering Research Center of Grassland Industry,Ministry of Education/Center for Grassland Microbiome/Gansu Technology Innovation Center of Western China Grassland Industry/College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,Gansu,China)

机构地区：[1]兰州大学草地农业生态系统国家重点实验室/兰州大学农业农村部草牧业创新重点实验室/兰州大学草地农业教育部工程研究中心/兰州大学微生物研究中心/兰州大学甘肃省西部草业技术创新中心/兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《草业科学》2022年第6期1176-1184,共9页Pratacultural Science

基　　金：国家973项目(2017CB138702);国家自然科学基金(31971756);中央高校基本科研业务费项目(LZUJBKY-2021-kb10)。

摘　　要：为探究不同水分条件和内生真菌互作对牧草型野大麦(Hordeum brevisubulatum)生长发育及产量的影响。采用温室盆栽法模拟田间最大持水量(FWC),共设6个水分梯度(50%、60%、70%、80%、90%和100%FWC),对带内生真菌(E+)与不带内生真菌(E–)的乡土草新品种‘河西’野大麦和东北地区优质品种‘萨尔图’野大麦(SA)3种材料进行试验处理。结果表明:1)野大麦的株高、分蘖数、叶长、茎粗、叶面积、叶绿素含量、根长、干重等农艺指标随着水分含量增加呈现先增高后降低的趋势,各材料在80%FWC处理下获得最大值,整体与70%FWC差异不显著(P>0.05)。2)同一水分处理下不同材料的分析表明,‘河西’野大麦的茎粗、分蘖数、株高、叶长、叶面积及地上干重等牧草指标均优于对照组‘萨尔图’野大麦,且‘河西’野大麦品种中E+各指标均显著高于E–(P<0.05),其中E+野大麦地上干重最大值较E–和A分别提高了8.90%和30.38%。3)不同水分处理与内生真菌交互作用对各野大麦材料生长影响显著(P<0.01)。研究发现,70%和80%FWC为野大麦生长适宜含水量,80%FWC在农艺性状上效果最优,70%FWC节水高效,且野大麦在生长发育过程中具有一定耐涝能力;带有内生真菌的‘河西’野大麦为此次试验中生长发育更具优势的牧草品种。The purpose of this study was to explore the effects of different water conditions and endophytic fungal interactions on the growth,development,and yield of the forage grass Hordeum brevisubulatum(wild barley).The maximum field capacity,expressed as field water content(FWC),was simulated by greenhouse pot planting.Six water gradients(50%,60%,70%,80%,90%,and 100%FWC)were established to treat Hexi wild barley with endophytic fungi(E+)and without endophytic fungi(E–),and with Saertu wild barley(SA).Agronomic indices of wild barley,including plant height,number of tillers,leaf length,stem diameter,leaf area,chlorophyll content,root length,and dry weight,initially increased and then decreased with increasing water content.The maximum value of each material was obtained with 80%FWC treatment.No significant differences were evident between 70%FWC and 80%FWC.Analyses of different materials using the same water treatment revealed that forage indices,such as stem diameter,number of tillers,plant height,leaf length,leaf area,and aboveground dry weight of Hexi wild barley,were better than those of the control group SA.The aboveground dry weight of E+wild barley was 8.90%and 38.38%higher than that of E-and SA,respectively.Interactions between different water treatments and endophytic fungi significantly influenced the growth of wild barley materials(P<0.01).The collective findings reveal that 70%and 80%FWC was a suitable water content range for the growth of wild barley;80%FWC was best in agronomic indices,whereas 70%FWC was water-saving and efficient.Wild barley displayed some tolerance to waterlogging in the process of growth and development.Hexi wild barley with endophytic fungi was a more dominant forage variety in this study.

关 键 词：野大麦 不同水分梯度 农艺性状 牧草产量 

分 类 号：S543.9[农业科学—作物学]