摘要
本研究通过对不同来源的5龄老芒麦[海拔分别为2 223 m、1 195 m的新疆野生老芒麦(S1和S3);西藏野生老芒麦(S2);栽培种‘川草2号’老芒麦(S4)]进行“一”字切根(RC1)和“十”字切根(RC2)及分株移栽(RT)的处理,以未处理母株为对照(CK),研究各处理措施对老芒麦植株和土壤主要营养元素碳(C)、氮(N)、磷(P)及其计量特征的影响,以期为延缓老芒麦衰老技术的选择奠定基础。结果表明,RC1处理基于大多材料来说,能很好地提高地上部植株的N、P含量以及地下土壤的N、P含量,降低植株的C:N;RC2处理能提高部分材料的地上部植株的C含量、C:P以及土壤的C和P含量;RT处理则对大多数材料的C含量有明显的提高。相关性和冗余分析(RDA)结果显示,植物与土壤均受N含量的限制。综合而言,“一”字切根对5龄老芒麦复壮具有比较显著的效果。
In this study,through the analysis of 5-year-Elymus sibiricus from different sources[Xinjiang wild E.sibiricus with altitudes of 2223 m and 1195 m(S1 and S3);Xizang wild E.sibiricus(S2)and cultivated E.sibiricus‘Chuancao No.2’(S4)]were treated with root cutting in“-”shape(RC1)and root cutting in“+”shape(RC2)and ramet transplanting(RT).The untreated mother plants were used as the control(CK).We studied its effects on the main nutrients-carbon(C),nitrogen(N),and phosphorus(P)-and the metering characteristics between the plant and soil to lay a foundation for technology selection to delay the senescence of E.sibiricus.The results showed that,based on most materials,RC1 treatment could improve the N and P contents of the above-ground plants and underground soil,and reduce the C꞉N of the plants.RC2 treatment of some materials could increase the C content and C꞉P of the above-ground plants,and the C and P content of the underground soil.RT treatment significantly increased the C content of most materials.The results of correlation and redundancy analysis(RDA)showed that both plants and soil were limited by N content.In general,one root cutting had a relatively significant effect on the rejuvenation of 5-year-E.sibiricus.
作者
杨娟弟
祁娟
方强恩
贾燕伟
赛宁刚
车美美
王晓娟
YANG Juandi;QI Juan;FANG Qiang’en;JIA Yanwei;SAI Ninggang;CHE Meimei;WANG Xiaojuan(College of Grassland Science,Gansu Agricultural University/Key Laboratory of Grassland Ecosystem,Ministry of Education/Gansu Grassland Engineering Laboratory/China-USC enter for Grazing Land Ecosystem Sustainability,Lanzhou 730070,Gansu,China)
出处
《草业科学》
CAS
CSCD
北大核心
2023年第4期1004-1013,共10页
Pratacultural Science
基金
国家现代农业产业技术体系(CARS-34)
国家自然科学基金(31660684)
青海省科技厅重点实验室发展专项(2020-ZJ-Y03)。
关键词
老芒麦
切根
分株移栽
植物养分
土壤养分
化学计量比
Elymus sibiricus
cutting roots
ramet transplanting
plant nutrients
soil nutrients
chemical metering.
