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Evaluation of a crop rotation with biological inhibition potential to avoid n_(2)O emissions in comparison with synthetic nitrification inhibition

引用

Journal of Environmental Sciences 2023年第5期127卷 222-233页

作者： Adrián Bozal-Leorri Mario Corrochano-Monsalve Luis M.Arregui Pedro M.Aparicio-Tejo Carmen González-Murua Department of Plant Biology and Ecology University of the Basque Country(UPV/EHU)Apdo.644E-48080Bilbao 48940Spain Institute for Innovation and Sustainable Development in Food Chain(ISFOOD) Public University of NavarrePamplona 31006Spain Institute for Multidisciplinary Research in Applied Biology(IMAB) Public University of NavarrePamplona 31006Spain

Agriculture has increased the release of reactive nitrogen to the environment due to crops’low nitrogen-use efficiency(nUE)after the application of *** like the use of stabilized-fertilisers with nitrification inhibitors such as DMPP(3,4-dimethylpyrazole phosphate)have been adopted to reduce nitrogen ***,cover crops can be used in crop-rotation-strategies to reduce soil nitrogen pollution and benefit the following ***(Sorghum bicolor)could be a good candidate as it is drought tolerant and its culture can reduce nitrogen losses derived from nitrification because it exudates biological nitrification inhibitors(BnIs).This work aimed to evaluate the effect of fallow-wheat and sorghum cover crop-wheat rotations on n_(2)O emissions and the grain yield of winter wheat *** addition,the suitability of DMPP addition was also *** use of sorghum as a cover crop might not be a suitable option to mitigate nitrogen losses in the subsequent *** sorghum–wheat rotation was able to reduce 22%the abundance of amoA,it presented an increment of 77%in cumulative n_(2)O emissions compared to fallow–wheat rotation,which was probably related to a greater abundance of heterotrophic-denitrification *** the other hand,the application of DMPP avoided the growth of ammonia-oxidizing bacteria and maintained the n_(2)O emissions at the levels of unfertilized-soils in both *** a conclusion,the use of DMPP would be recommendable regardless of the rotation since it maintains nH_(4)^(+)in the soil for longer and mitigates the impact of the crop residues on nitrogen soil dynamics.

关键词： Fallow Sorghum Crop rotation nitrification inhibitor n-cycling genes Soil mineral nitrogen

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