Root pH variation of herbaceous plants among plant functional groups in response to climate and soil gradients on the Tibetan alpine grasslands.

The root pH of herbaceous plants showed a significant negative correlation with K soil , water content and CEC content ( p < .01), whereas it exhibited an increasing trend with soil pH ( p < .001; Figure 3a–d ).

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The root pH increased with solar radiation across all plants, grasses, sedges and forbs ( p < .01); however, that of legumes showed a decreasing trend with increasing solar radiation ( p < .01; Figure 2d ).

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Here, the root pH of alpine herbaceous plants showed a positive trend with increasing SR.

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