Effects of root cutting and ramet propagation on nutrient elements and stoichiometric character of Elymus sibiricus

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.