In-vitro evaluation of rice straw biochars' effect on bispyribac-sodium dissipation and microbial activity in soil.,Ecotoxicology and Environmental Safety

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In-vitro evaluation of rice straw biochars' effect on bispyribac-sodium dissipation and microbial activity in soil.
Ecotoxicology and Environmental Safety ( IF 6.2 ) Pub Date : 2020-01-16 , DOI: 10.1016/j.ecoenv.2020.110204
Neha Sharma ₁ , Pervinder Kaur ₂ , Deepali Jain ₂ , Makhan Singh Bhullar ₂

Affiliation

Dissipation of bispyribac-sodium was estimated in an unamended sandy loam soil and soil amended with rice straw and its biochars in pot culture experiment. Effect of herbicide and amendments on abundance and activity of soil microbial parameters was also assessed by determining soil biological parameters. Amendment type, application rate and soil moisture had differential influence on bispyribac-sodium dissipation and soil's microbial parameters. Amendment of soil with rice straw and its biochars enhanced the dissipation of bispyribac-sodium (DT50 = 7.55-18.44 days) as compared to unamended soil (DT50 = 23.13-28.60 days) and dissipation decreased in this order: rice straw >350BC > 550BC > CBC amended soil > unamended soil. Dissipation of bispyribac-sodium decreased with increase in amendment level of rice straw and its biochars in soil. Irrespective of amendment type and application rate, bispyribac sodium was more persistent under submerged conditions than at field capacity and its DT50 was 10.13 to 28.60 and 7.55-27.14 days, respectively. Dehydrogenase, alkaline phosphatase activity and bacterial population indicated that application of the organic amendment decreased negative effects of the herbicide on soil enzymatic activities. These findings prove that biostimulation using rice straw and its biochars has the potential to decrease the persistence of bispyribac-sodium and minimize its environmental hazards.

中文翻译：

稻草生物炭对土壤中双嘧菌钠消散和微生物活性的体外评估。

在盆栽试验中，估计了在未改良的沙质壤土和用稻草及其生物炭改良的土壤中的双嘧啶钠的消散。还通过确定土壤生物学参数评估了除草剂和改良剂对土壤微生物参数的丰度和活性的影响。改良剂的种类，施用量和土壤水分对双嘧菌钠的消散和土壤微生物参数的影响不同。与未改良的土壤（DT50 = 23.13-28.60天）相比，用稻草及其生物炭对土壤的改良提高了双嘧菌钠的耗散（DT50 = 7.55-18.44天），并且耗散依次降低：稻草> 350BC> 550BC > CBC修改过的土壤>未修改过的土壤。随着土壤中稻草及其生物炭的改良水平提高，双嘧菌钠的耗散量降低。不管改种类型和施用量如何，比吡贝巴钠在淹没条件下的持久性要强于田间条件，其DT50分别为10.13至28.60和7.55-27.14天。脱氢酶，碱性磷酸酶活性和细菌数量表明，有机修饰剂的施用减少了除草剂对土壤酶活性的负面影响。这些发现证明，使用稻草及其生物炭进行生物刺激具有减少双嘧啶钠的持久性并将其环境危害最小化的潜力。比吡利巴克钠在淹没条件下的持久性要强于田间条件，其DT50分别为10.13至28.60和7.55-27.14天。脱氢酶，碱性磷酸酶活性和细菌数量表明，有机修饰剂的施用减少了除草剂对土壤酶活性的负面影响。这些发现证明，使用稻草及其生物炭进行生物刺激具有减少双嘧啶钠的持久性并将其环境危害最小化的潜力。比吡利巴克钠在淹没条件下的持久性要强于田间条件，其DT50分别为10.13至28.60和7.55-27.14天。脱氢酶，碱性磷酸酶活性和细菌数量表明，有机修饰剂的施用减少了除草剂对土壤酶活性的负面影响。这些发现证明，使用稻草及其生物炭进行生物刺激具有减少双嘧啶钠的持久性并将其环境危害最小化的潜力。

更新日期：2020-01-16

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