Reduced sulfentrazone phytotoxicity through increased adsorption and anionic species in biochar-amended soils
Reduced sulfentrazone phytotoxicity through increased adsorption and anionic species in biochar-amended soils
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通过增加生物炭改良土壤中的吸附和阴离子种类来降低甲磺草胺的植物毒性
DOI：
10.1007/s11356-016-6212-5
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发表时间：
2016-02
影响因子：
5.8
通讯作者：
Bai, Lianyang
中科院分区：
文献类型：
--
作者：
Yu, Bingqi;Luo, Kun;Liu, Xiangying;Bai, Lianyang
在田间焚烧秸秆是一种常见的农业做法。研究了添加稻草生物炭对甲磺草胺对水稻药害的影响。观察了总的来说，在三种不同的土壤中添加1%的生物炭，甲磺草胺的植物毒性也降低了.大蒜降低，并且抑制生长50%的浓度（IC 50）增加1.4至7.6倍。为了阐明其影响机制，研究了中空纤维液相微萃取技术对甲磺草胺在土壤中的吸附、土壤pH值以及甲磺草胺生物有效性的影响。甲磺草胺对土壤的Freundlich常数（Kf）比未加药土壤的Kf增加1.5 ~ 25倍，土壤pH值增加0.36 ~ 1.36单位，甲磺草胺游离态增加10.2- 17.4%。此外，甲磺草胺在3种未改良土壤溶液中的平均浓度是3种生物炭改良土壤溶液中的1.3-6.1倍。这些结果表明，生物炭对甲磺草胺的吸附量增加，土壤pH值升高，降低了生物有效浓度，降低了其对植物的毒性。大蒜
Burning straw in the field is a common agricultural practice. The effects of adding biochar derived from rice straw to soils on the phytotoxicity of sulfentrazone toOryza sativaL. were observed. Overall, when 1 % biochar was added to three different soils, the phytotoxicity of sulfentrazone toO. sativaL. decreased, and the concentration that inhibits growth by 50 % (IC50) increased by 1.4 to 7.6 times. To illuminate the influencing mechanisms, the changes in sulfentrazone adsorption to the soil, the soil pH, and the bioavailable sulfentrazone extracted from the soil solution using hollow fiber-based liquid-phase microextraction were studied. The Freundlich constant (Kf) of sulfentrazone to the soil increased 1.5 to 25 times relative to theKfin the three unamended soils, and the soil pH increased by 0.36 to 1.36 units resulted in a fraction of dissociated sulfentrazone increased by 10.2–17.4 %. In addition, the average concentrations of sulfentrazone in the three unamended soil solutions were 1.3–6.1 times relative to those in the three biochar-amended soil solutions. These results suggest that the sulfentrazone adsorption and soil pH increased when soils were amended with biochar, which decreased the bioavailable concentrations and reduced its phytotoxicity toO. sativaL.
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影响因子：
7.4
作者：
Jing-fu Liu;J. Jönsson;P. Mayer
通讯作者：
Jing-fu Liu;J. Jönsson;P. Mayer
影响因子：
8.8
作者：
Sopena, Fatima;Semple, Kirk;Bending, Gary
通讯作者：
Bending, Gary
影响因子：
8.9
作者：
D. Sijm;R. Kraaij;A. Belfroid
通讯作者：
D. Sijm;R. Kraaij;A. Belfroid
影响因子：
13.6
作者：
Jiang, Jun;Xu, Ren-kou;Li, Zhuo
通讯作者：
Li, Zhuo
影响因子：
2.5
作者：
Ferrell, JA;Witt, WW;Vencill, WK
通讯作者：
Vencill, WK