Suppression of nitrous oxide production by the herbicides glyphosate and propanil in soils supplied with organic matter(Soil Biology)

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概要

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• Laboratory experiments were conducted to investigate the impact of two herbicides, a commercial formulation of glyphosate (Roundup) and propanil (DCPA), on nitrous oxide (N_2O) production and soil respiration in two different soils (Tyatkone and Miura) amended with rice straw and chitin. The N_2O production rates were very small in both control soils (maximum activity during a whole incubation period was 0.1 μg N kg^<-1> of soil), but increased with the application of chitin (59 and 152 μg N kg^<-1>) and rice straw (26.6 and 6.2 μg N kg^<-1>) in Tyatkone and Miura soils, respectively. Throughout the 6-week incubation, the application of glyphosate and propanil suppressed cumulative N_2O production in both types of organic matter amended soils. In the rice straw amended Tyatkone soil, the application of glyphosate and propanil decreased N_2O production by 92 and 89%, respectively, and it decreased N_2O production by 20 and 79%, respectively, in the chitin amended Tyatkone soil. In the Miura soil amended with rice straw, the application of glyphosate and propanil decreased N_2O production by 50 and 65%, respectively, while it decreased N_2O production by 49 and 48%, respectively, in the soil amended with chitin. There were no significant differences in cumulative CO_2 evolution between the treatments. It might be suggested that the herbicides used in this study had no severely adverse effects on the overall soil microbial community. Collectively, glyphosate and propanil application can be used as a mitigation strategy to reduce N_2O production from agricultural soils with organic amendment.

著者

• Kyaw Moe

  Graduate School Of Bio-applications And Systems Engineering Tokyo University Of Agriculture And Tech

• Kyaw Khin

  Graduate School Of Bio-applications And Systems Engineering Tokyo University Of Agriculture And Tech

• Toyota Koki

  Department of Environment-Symbiotic Production Systems, Graduate School of Bio-Applications and Syst

• Toyota Koki

  Department Of Agricultural Chemistry Yezin Agricultural University

関連論文

• Suppression of nitrous oxide production by the herbicides glyphosate and propanil in soils supplied with organic matter(Soil Biology)
• Effects of Successive Soil Freeze-Thaw Cycles on Nitrification Potential of Soils(Soil Biology)
• Effects of Successive Soil Freeze-Thaw Cycles on Soil Microbial Biomass and Organic Matter Decomposition Potential of Soils(Soil Biology)

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