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| Wen,L; Dong,SK; Li,YY; Pulver,C; Li,XY; Shi,JJ; Wang,YL; Ma,YS; Liu,DM. |
| The alpine grassland in the Qinghai-Tibet Plateau is an extensive rangeland ecosystem sustaining a sparse population of traditional nomadic pastoralists in China. However, global climate change and anthropologic disturbances have severely degraded the alpine grasslands, and the consequences of this degradation are largely unknown. Forage is the only food source for livestock in the alpine region, and livestock is the major income source for nomadic herders. Therefore, it is critical to assess the forage quantity and quality along the current grassland degradation gradient. In this study, we examined the botanical composition, biomass of different functional groups, and forage grass nutritive values, and classified forage grasses according to their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aboveground biomass; Alpine grassland; Degradation gradient; Forage nutrient; Qinghai-Tibet Plateau; Vegetation composition. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100007 |
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| Li,YY; Lü,X-T; Wang,Z-W; Zhou,C; Han,X-G. |
| Relative growth rate (RGR) of plants is a key component of fitness. Theoretically, the RGR of plants would be closely related with biomass allocation. Our mechanistic understanding of the relationship between RGR and biomass allocation under global change scenarios is still limited. We examined the responses of RGR and biomass allocation of Leymus chinensis, a dominant grass in the temperate steppe of northern China, to a wide range of N addition. We found that N addition increased RGR of L. chinensis up to a threshold of 10 g N/m². While leaf and stem weight ratios were positively correlated with N addition rates, root weight ratio showed a negative correlation. The RGR of total biomass was positively correlated with both leaf and stem weight ratios, but... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant functional traits; Nitrogen deposition; Growth dynamics; Temperate steppe; Allometry. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200008 |
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