不同配方种衣剂对高寒草地乡土草种种子生长与建植的影响  

Effects of different coating agents on seed growth and planting of native grasses in alpine grassland

作　　者：王麟 李雪 王愉 王新 胡小文[1] 杨梅[1] 朱剑霄 WANG Lin;LI Xue;WANG Yu;WANG Xin;HU Xiao-Wen;YANG Mei;ZHU Jian-Xiao(College of Pastoral Agriculture Science and Technology,State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems,Lanzhou University,Lanzhou 730020,China)

机构地区：[1]兰州大学草地农业科技学院,兰州大学草种创新与草地农业生态系统全国重点实验室,兰州730020

出　　处：《植物生态学报》2025年第1期118-128,共11页Chinese Journal of Plant Ecology

基　　金：中国科学院战略性先导科技专项(A类)(XDA26020201);甘肃省科技重大专项(23ZDNA009);青海省交通运输厅科技项目(2019-07)。

摘　　要：种子包衣技术是提高极端生境幼苗建植与生长的重要措施,但现有包衣技术多应用于经济作物。该研究针对青藏高原主要补播草种田间出苗差、建植困难等问题,设计了养分(N)、微生物菌剂(MC)和生长调节剂(G)等不同配方种衣剂,分别采用室内盆栽和田间实验评价了不同种衣剂处理对3种禾草种子出苗和生长的影响。室内盆栽结果表明,养分+菌剂+生长调节剂(NMCG)处理的垂穗披碱草(Elymusnutans)和草地早熟禾(Poapratensis)出苗率优于其他配方,出苗率较对照(填充剂包衣,CK3)分别提高了27%和44%。养分+菌剂(NMC)处理的垂穗披碱草地上和地下生物量均最高;复合菌剂(MC2)处理的中华羊茅(Festucasinensis)地上生物量最高,NMC处理的中华羊茅地下生物量最高;NMCG处理的草地早熟禾地上和地下生物量最高。田间实验结果表明,补播NMCG处理种子后,恢复草地高度、盖度和地上、地下生物量最高;其他配方包衣的补播恢复效果也优于原生草地(CK1);含有微生物菌剂的种衣剂处理,均显著提高了恢复草地优质牧草比例。综上,NMCG包衣能够显著提高高寒退化草地3种禾草草种的田间建植与表现,为乡土草种在青藏高原高寒退化草地的高效利用提供技术支撑。Aims Seed coating is an effective measure to enhance seedling establishment and growth in extreme environment.Currently,seed coating is most commonly used in crops,this study designed multiple seed coating formulations to address poor field emergence and low establishment rates of major reseeding grass species on the Qingzang Plateau.Our work aims to providing technical support for efficient application of native grass species in restoring degraded alpine grasslands on the Qingzang Plateau.Methods We designed multiple seed coating formulations using different levels of nutrients(N),microbial inoculants(MC),and growth regulators(G).We performed laboratory growth experiment and field experiments to evaluate the effects of different seed coating treatments on the seed emergence and growth of three grass species.Important findings Emergence rates of Elymus nutans and Poa pratensis treated with microbial fertilizers+compound microbial inoculant+growth regulator(NMCG)were higher than those treated with other formulations.Such a formulation increased the emergence rates by 27%and 44%compared with the control(filler coating,CK3),respectively.Both the aboveground and belowground biomasses of Elymus nutans treated with microbial nutrients+microbial inoculant(NMC)were the highest.The above-ground biomasses of Festuca sinensis treated with compound microbial inoculant(MC2)were the highest,and the below-ground biomasses of Festuca sinensis treated with NMC were the highest.The above-ground and below-ground biomasses of Poa pratensis treated with NMCG were the highest.The field experiment showed grasslands reseeded with seedstreated using NMCG,they had the highest height,coverage,and above-ground/below-ground biomass.Therestoration effects of other formula-coated reseeding were also better than those of grassland(CK1).Finally,allcoating formulation containing microbial inoculants significantly increased the proportion of high-quality foragegrass species in the restored grassland.

关 键 词：草地恢复 微生物菌剂 生长调节剂 碳粉 青藏高原 

分 类 号：S51[农业科学—作物学]