期刊
PLANT AND SOIL
卷 381, 期 1-2, 页码 225-234出版社
SPRINGER
DOI: 10.1007/s11104-014-2114-9
关键词
Fine roots; Soil C; Soil N; Fine root mass density; Fine root C density
资金
- National Key Basic Research Program of China [2012CB416903]
- National Natural Science Foundation of China [31210103920, 31200406, 31260172]
Growth and distribution of fine roots closely depend on soil resource availability and affect soil C distribution in return. Understanding of relationships between fine root distribution and soil C can help to predict the contribution of fine root turnover to soil C accumulation. A study was conducted in a subtropical Cunninghamia lanceolata plantation to assess the fine root mass density (FRMD), fine root C density (FRCD) of different fine root groups as well as their relations with soil C. The FRMD and FRCD of short-lived roots, dead roots and herb roots peaked in the 0-10 cm soil layer and decreased with soil depth, while FRMD, FRCD of long-lived roots peaked in the 10-20 cm soil layer. Soil C was positively related to FRMD and FRCD of total fine roots (across all three soil layers), dead roots (0-10 cm) and herb roots (10-20 cm) as well as FRCD of short-lived roots (20-40 cm) (P < 0.05). Soil C was mainly affected by herb roots in upper soil layers and by woody plant roots in deeper soil layers.
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