中图分类号：S544.9 文献标识码：A 文章编号：1007-0435（2025）07-2357-11

doi：10.11733/j.issn.1007-0435.2025.07.029

引用格式：，等.施用复合微生物菌剂对燕麦生长和根系发育的影响[J].草地学报，2025，33（7）：2357一 2367 LIU Xin-yue，WANG Jie，ZHANG Hai-juan，etal.Effects of Applicationof Compound Microbial Inoculants on Oat Growth and Root Development in Qaidam Basin[J]. Acta Agrestia Sinica，2O25，33（7）：2357-2367

Effects of Application of Compound Microbial Inoculants on Oat Growth and RootDevelopmentin Qaidam Basin

LIU Xin-yue1， WANG Jie1， ZHANG Hai-juan²， FU Yun-jie³，BAO Kui³， QUAN Zhi-xiu³， DANG Yu-hong？， WANG Wei4.5， XU Cheng ⋅ti^4，5 ，LU Guang ⋅xin^1，5* ， ZHU Ting-heng6* （1.CollgofAgricultureadAnialHusbandryQinghaiUniversityining，inghaiProvinceOl6，China；.QighaIsiutef

TechoOlogy，XiningQingirovce86，hina;.Chia;QinghaiBeshengGrassdustryCotd.，elinghaQighaoince 817000，China;4.QinghaiUnversityColegeofAnimalHusbandryandVeterinarySciences，XiningQinghaiProvinceoCina; 5.NorthwestKeyLboratoryofCultiatedLandConservatioandMarginalLandImprovementinistryofAgricultureanduraffirs，

Delingha，QingaiPriceohina;6Colgeofotechlogndenieing，ZhejngUnivrsityogHgo Zhejiang Province 310014，China）

Abstract：To investigate the effects of compound microbial agents on the growth of oat（Avena satiua） in the

Qaidam Basin，oat variety‘Qingtian No.1’ was used as the experimental material. Three treatments were set up：a control （CK），application of compound microbial agent at 75kg⋅hm^-2（B₁） ，and 150kg⋅hm^-2Ω（I （B₂） ： Indicators such as plant height，biomass，chlorophyllcontent，root characteristics，and dry matter accumulation of oats were measured at the jointing stage，flowering stage，and dough stage to explore the efects of diferent application rates of the compound microbial agents on oat growth and root development. The results showed that： At the jointing stage，both B₁ and B₂ treatments significantly increased plant height，chlorophyll content， and biomass （ ⋅Plt;0.05 .The B₂ treatment significantly enhanced all root indicators （ .Plt;0.05 ），and oat yield showed a significant positive correlation with fresh weight and chlorophyll content （ .At the flowering stage，both B₁ and B₂ treatments significantly increased plant height （ ⋅Plt;0.05） ，while the B₁ treatment significantly enhanced biomass （ ⋅Plt;0.05 .At the dough stage，both B₁ and B₂ treatments significantly promoted the accumulation of chlorophyll content （ ⋅Plt;0.05） .The B₁ treatment significantly increased plant height，while the B₂ treatment significantly increased the number of root tips（ Plt;0.05） .Additionally，oat yield was significantly positively correlated with plant height and root surface area （ ⋅lt;0.05） . In summary，the application of 75kg⋅hm^-2 of compound microbial agents exhibited the optimal promoting efect on aboveground oat growth and dry matter accumulation，while the application of 150kg⋅hm^-2 was more beneficial for the development of underground root systems.These findings provide a theoretical basis for exploring microbial fertilizer technologies and methods to enhance forage cultivation in the Qaidam Basin.

Key words：Composite microbial fungicide;Qaidam Basin; Oat growth;Root development

饲草是省草牧业发展与牧民生计提升的特色产业1，在促进生态文明建设和保障粮食安全方面具有重要的意义。在生态保护和经济发展的双重挑战下，饲草种植成为协同应对草地资源退化与畜牧业发展约束的有效路径[2-3]。燕麦因其营养价值高、高产、抗旱、耐寒、耐贫瘠等特性，在青藏高原高寒区被广泛种植[4-6]。截至2023年，省的人工饲草种植面积稳定在133万 hm² 以上，2022年总面积突破153万 hm^2[7] ，显著减轻了天然草原的放牧压力[8]。由此可见，提升饲草质量和产量是省农牧业可持续发展的关键。

已有研究指出，微生物菌肥已在多种农作物中得到广泛应用，包括豆科牧草如苜蓿（MedicakgoSativa）、红豆草（Onobrychisviciaefolia）和红三叶（Trifoliumpratense），禾本科作物如小麦（Triticumaestiuum）以及蔬菜类作物如番茄（Lycopersiconesculentum）和黄瓜（Cucumis satious）等[9-12]。研究表明，微生物菌剂不仅能促进植物生长，还能增强植物抗性，如抗旱、抗盐碱和抗病虫害等[13]。微生物菌剂通过优化土壤微生物群落结构、增强土壤肥力及提高植物养分吸收效率等机制，有效地促进作物生长和提高产量。在干旱和贫瘠的土壤条件下，微生物菌剂尤能显著改善土壤环境和促进作物根系发展，从而提升作物的生长潜力[14]。在牧草种植方面，复合微生物菌剂的使用能显著提升牧草的产量和品质，同时改善其营养价值，为畜牧业提供更优质的饲料资源。对于高营养价值的牧草如燕麦，微生物菌剂的应用有助于其生长和干物质积累，促进牧草生产的稳定性和可持续性[15]。……