Comparative analysis of annual rings of perennial forbs in the Loess Plateau, China

  title={Comparative analysis of annual rings of perennial forbs in the Loess Plateau, China},
  author={Songlin Shi and Zongshan Li and Hao Wang and Xing Wu and Shuai-Hua Wang and Xiaochun Wang and Guohua Liu and Bojie Fu},
Although recent studies have demonstrated that annual growth rings are present among perennial forbs species at high northern latitudes, little is known about whether there are demarcated growth rings of perennial forbs in the Loess Plateau of China where plant growth is strongly limited by dry climate conditions and severe soil erosion. In this study, we collected the main roots of 11 perennial forbs species along the precipitation gradient in the Loess Plateau, and analyzed the growth rings… 
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