Interactive effects of charcoal and earthworm activity increase bioavailable phosphorus in sub-boreal forest soils
Interactive effects of charcoal and earthworm activity increase bioavailable phosphorus in sub-boreal forest soils
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DOI：
10.1007/s00374-017-1227-8
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发表时间：
2017-08
影响因子：
6.5
通讯作者：
Melissa R. A. Pingree;K. Makoto;T. DeLuca
中科院分区：
文献类型：
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作者：
Melissa R. A. Pingree;K. Makoto;T. DeLuca
本研究的目的是评估的影响，木炭和木炭存在于对比土壤类型的北方日本使用生物为基础的磷（BBP）提取方法，采用了各种植物磷的收购策略。利用在蛇纹石和沉积母质中发育的土壤，我们测试了日本蚯蚓（Michaelsen）和500 kg ha− 1矮竹炭（Sasa kurilensis（Rupr.）Makino et柴田）在一个持续四周的微观世界孵化。在用BBP方法孵育后，使用0.01 M CaCl2（可溶性P）、0.01 M柠檬酸（螯合物可提取的P）、0.02磷酸酶单位ml−1（酶可提取的有机P）和1.0 M HCl（矿物吸留P）平行提取土壤。在施用到土壤微宇宙之前，仅矮竹炭就含有高达444 mg总BBP kg− 1。在沉积土壤类型和木炭与蚯蚓结合的土壤微宇宙中，处理效果最高（15.97 mg P kg−1± SE 1.23总无机BBP）。在组合处理中，顽固性无机磷（盐酸提取）产生了最高的单一无机BBP测量值（12.41 mg kg−1± SE 1.11）。我们的研究结果表明，木炭，作为野火的遗产，和本地的生物活性可能有助于刺激循环的柠檬酸盐无机BBP池。
The purpose of this study was to assess the effects of charcoal and earthworm presence in contrasting soil types of northern Japan using the biologically based phosphorus (BBP) extraction method, which employs a variety of plant P acquisition strategies. Using soils developed in serpentine and sedimentary parent materials, we tested the interactive effects ofEisenia japonica(Michaelsen) earthworms and 500 kg ha−1of dwarf bamboo charcoal (Sasa kurilensis(Rupr.) Makino et Shibata) in a microcosm incubation that lasted four weeks. Soils were extracted in parallel after the incubation with the BBP method using 0.01 M CaCl2(soluble P), 0.01 M citric acid (chelate-extractable P), 0.02 phosphatase enzyme units ml−1(enzyme-extractable organic P), and 1.0 M HCl (mineral occluded P). Dwarf bamboo charcoal alone contained up to 444 mg total BBP kg−1prior to application to soil microcosms. Treatment effects in soil microcosms were highest in sedimentary soil types and where charcoal was combined with earthworms (15.97 mg P kg−1± SE 1.23 total inorganic BBP). Recalcitrant inorganic P (HCl extracted) in combination treatments yielded the highest single inorganic BBP measure (12.41 mg kg−1± SE 1.11). Our findings suggest that charcoal, as a legacy of wildfire, and native earthworm activity may help stimulate cycling of recalcitrant inorganic BBP pools.