Reduced arsenic availability and plant uptake and improved soil microbial diversity through combined addition of ferrihydrite and Trichoderma asperellum SM-12F1
Reduced arsenic availability and plant uptake and improved soil microbial diversity through combined addition of ferrihydrite and Trichoderma asperellum SM-12F1
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通过混合添加水铁矿和木霉 SM-12F1，减少砷的有效性和植物吸收，并改善土壤微生物多样性
DOI：
10.1007/s11356-018-2451-y
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发表时间：
2018-06
影响因子：
5.8
通讯作者：
Su Shiming
中科院分区：
文献类型：
--
作者：
Zhang Hongxiang;Zeng Xibai;Bai Lingyu;Shan Hong;Wang Yanan;Wu Cuixia;Duan Ran;Su Shiming
农业土壤中的砷（As）积累容易被作物吸收，对人类健康构成风险。钝化显示出使土壤中不稳定的砷失活并降低作物对砷吸收的潜力，但通常对改善受砷污染（此处原句似乎不完整，应为As - contaminated soil之类的表述）中的微生物群落作用甚微。
Arsenic (As) accumulation in agricultural soils is prone to crop uptake, posing risk to human health. Passivation shows potential to inactivate soil labile As and lower crop As uptake but often contributes little to improving the microbiota in As-contaminated soils. Here, the combined addition of ferrihydrite and Trichoderma asperellum SM-12F1 as a potential future application for remediation of As-contaminated soil was studied via pot experiments. The results indicated that, compared with the control treatment, the combined addition of ferrihydrite and T. asperellum SM-12F1 significantly increased water spinach shoot and root biomass by 134 and 138%, respectively, and lowered As content in shoot and root by 37 and 34%, respectively. Soil available As decreased by 40% after the combined addition. The variances in soil pH and As fractionation and speciation were responsible for the changes in soil As availability. Importantly, the combined addition greatly increased the total phospholipid fatty acids (PLFAs) and gram-positive (G+), gram-negative (G-), actinobacterial, bacterial, fungal PLFAs by 114, 68, 276, 292, 133, and 626%, respectively, compared with the control treatment. Correspondingly, the soil enzyme activities closely associated with carbon, nitrogen, and phosphorus mineralization and antioxidant activity were improved. The combination of ferrihydrite and T. asperellum SM-12F1 in soils did not reduce their independent effects.
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