Effects of Short-Term Nitrogen Additions on Biomass and Soil Phytochemical Cycling in Alpine Grasslands of Tianshan, China.

There were large differences in the patterns of change in the three indexes between different soil layers under the two nitrogen addition modes, but the similarity of the patterns of change in the TOC:TP and TN:TP in the same soil layer under the same nitrogen addition mode was high (TOC:TP and TN:TP in the 0–10 cm soil layer showed a decreasing trend with low-frequency nitrogen addition, and increased and then decreased in the 10–20 cm soil layer; TOC:TP and TN:TP in the 0–10 cm soil layer showed an increasing trend with high-frequency nitrogen addition, and increased and then decreased in the 10–20 cm soil layer).

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