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首页> 美国卫生研究院文献>Scientific Reports >Biochar and Glomus caledonium Influence Cd Accumulation of Upland Kangkong (Ipomoea aquatica Forsk.) Intercropped with Alfred Stonecrop (Sedum alfredii Hance)
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Biochar and Glomus caledonium Influence Cd Accumulation of Upland Kangkong (Ipomoea aquatica Forsk.) Intercropped with Alfred Stonecrop (Sedum alfredii Hance)

机译：生物炭和格洛莫斯卡利地铵对高地康孔（Ipomoea aquatica Forsk。）与阿尔弗雷德·景天属（Sedum alfredii Hance）间作的镉积累的影响

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摘要

Both biochar application and mycorrhizal inoculation have been proposed to improve plant growth and alter bioaccumulation of toxic metals. A greenhouse pot trial was conducted to investigate growth and Cd accumulation of upland kangkong (Ipomoea aquatica Forsk.) intercropped with Alfred stonecrop (Sedum alfredii Hance) in a Cd-contaminated soil inoculated with Glomus caledonium and/or applied with biochar. Compared with the monocultural control, intercropping with stonecrop (IS) decreased kangkong Cd acquisition via rhizosphere competition, and also decreased kangkong yield. Gc inoculation (+M) accelerated growth and Cd acquisition of stonecrop, and hence resulted in further decreases in kangkong Cd acquisition. Regardless of IS and +M, biochar addition (+B) increased kangkong yield via elevating soil available P, and decreased soil Cd phytoavailability and kangkong Cd concentration via increasing soil pH. Compared with the control, the treatment of IS + M + B had a substantially higher kangkong yield (+25.5%) with a lower Cd concentration (−62.7%). Gc generated additive effects on soil alkalinization and Cd stabilization to biochar, causing lower DTPA-extractable (phytoavailable) Cd concentrations and post-harvest transfer risks.
机译：已经提出了生物炭的施用和菌根接种都可以改善植物的生长并改变有毒金属的生物积累。进行了温室盆栽试验，调查了在接种了Glomus Caledonium和/或施用了生物炭的Cd污染土壤中，与Alfred stonecrop（Sedum alfredii Hance）间作的陆地棉（Ipomoea aquatica Forsk。）的生长和Cd积累。与单作控制相比，间作与间作（IS）间作减少了根际竞争对康孔镉的吸收，也降低了康孔产量。 Gc接种（+ M）加速了景天的生长和Cd的获取，因此导致康公Cd的获取进一步减少。不论IS和+ M，添加生物碳（+ B）都会通过提高土壤有效磷来提高土壤产量，并通过提高土壤pH值来降低土壤Cd的植物利用率和Cd浓度。与对照组相比，IS + M + B处理的康孔产量显着较高（+ 25.5％），而Cd浓度较低（-62.7％）。 Gc对土壤碱化和Cd对生物炭的稳定性产生累加效应，从而导致较低的DTPA可萃取（可利用的）Cd浓度和收获后转移风险降低。

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