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  • 标题:Silicon addition improves plant productivity and soil nutrient availability without changing the grass:legume ratio response to N fertilization
  • 本地全文:下载
  • 作者:Danghui Xu ; Tianpeng Gao ; Xiangwen Fang
  • 期刊名称:Scientific Reports
  • 电子版ISSN:2045-2322
  • 出版年度:2020
  • 卷号:10
  • 期号:1
  • 页码:1-9
  • DOI:10.1038/s41598-020-67333-7
  • 出版社:Springer Nature
  • 摘要:Silicon (Si) plays an important role in plant nutrient capture and absorption, and also promotes plant mechanical strength and light interception in alpine meadows. In this study, we conducted a field experiment to examine the effect of nitrogen (N) application, with (N   Si) and without Si (N-only), on the potential for soil nutrient and the growth of grass and legume plant functional types (PFTs) in an alpine meadow. It was found that N   Si resulted in higher soil nutrient contents, leaf N and P concentrations, abundance and biomass of legume and grass PFTs than N-only. The aboveground biomass of grass (598 g m−2) and legume (12.68 g m−2) PFTs under 600 kg ha−1 ammonium nitrate (NH4NO3) per year addition with Si was significantly higher than that under the same level of N addition without Si (515 and 8.68 g m−2, respectively). The grass:legume biomass ratio did not differ significantly between the N   Si and N-only. This demonstrates that Si enhances N fertilization with apparently little effect on grass:legume ratio and increases plant-available nutrients, indicating that Si is essential for the plant community in alpine meadows.
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