Changes in soil aggregate carbon dynamics under no-tillage with respect to earthworm biomass revealed by radiocarbon analysis
Changes in soil aggregate carbon dynamics under no-tillage with respect to earthworm biomass revealed by radiocarbon analysis
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DOI：
10.1016/j.still.2012.07.003
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发表时间：
2013-01-01
影响因子：
6.5
通讯作者：
Kaneko, Nobuhiro
中科院分区：
文献类型：
--
作者：
Arai, Miwa;Tayasu, Ichiro;Kaneko, Nobuhiro
土壤团聚体是已知的免耕管理（NT）下增加。我们假设，土壤碳（C）的增加，并研究了土壤团聚体的大小（>1 mm：L，1 mm）约占总土壤的80%，反映了NT和累积的碳管型（>1 mm）的活性的影响。冬季覆盖作物黑麦（Secale cereale L）和蚯蚓、杂草马唐（Digitaria ciliaris（Retz.）NF的Koel的Delta C-14值分别为30.1份/千份、35.3份/千份和41.9份/千份。蚯蚓吸收了最近被植物固定的碳，而所有土壤样品的δ C-14值都为负值（
Soil aggregates are known to increase under no-tillage management (NT). We hypothesized that earthworm activity increase soil carbon (C), and investigated the effect of earthworm activity on soil aggregate size (>1 mm: L, 1 mm) composed approximately 80% of the total soil, reflecting NT and accumulation of earthworm casts (>1 mm). The winter cover crop Secale cereale L at NC and earthworms and weeds Digitaria ciliaris (Retz.) Koel at NF had Delta C-14 values of 30.1 parts per thousand, 35.3 parts per thousand, and 41.9 parts per thousand, respectively. Earthworms incorporated C recently fixed by plants, whereas all soil samples showed negative Delta C-14 values (