Effects of biochar and 3,4-dimethylpyrazole phosphate (DMPP) on soil ammonia-oxidizing bacteria and nosZ-N2O reducers in the mitigation of N2O emissions from paddy soils     

Li  Jie  Wang  Shuai  Luo  Jiafa  Zhang  Lili  Wu  Zhijie  Lindsey  Stuart 《Journal of Soils and Sediments》2021,21(2):1089-1098

Purpose

Paddy fields are an important source of nitrous oxide (N₂O) emission. The application of biochar or the nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) to paddy soils have been proposed as technologies to mitigate N₂O emissions, but their mechanisms remain poorly understood.

Methods

An experiment was undertaken to study the combined and individual effects of biochar and DMPP on N₂O emission from a paddy field. Changes in soil microbial community composition were investigated. Four fertilized treatments were established as follows: fertilizer only, biochar, DMPP, and biochar combined with DMPP; along with an unfertilized control.

Results

The application of biochar and/or DMPP decreased N₂O emission by 18.9–39.6% compared with fertilizer only. The combination of biochar and DMPP exhibited higher efficiency at suppressing N₂O emission than biochar alone but not as effective as DMPP alone. Biochar promoted the growth of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB), while DMPP suppressed AOB and increased AOA. Applying biochar with DMPP reduced the impact of DMPP on AOB. The nirS-/nirK- denitrifiers were decreased and nosZ-N₂O reducers were increased by DMPP and the combination of DMPP and biochar. The abundance of the nirK gene was increased by biochar at the elongation and heading stages of rice development. Compared with fertilizer only, the application of biochar and/or DMPP promoted the abundance of nosZ genes.

Conclusion

These results suggest that applying biochar and/or DMPP to rice paddy fields is a promising strategy to reduce N₂O emissions by regulating the dynamics of ammonia oxidizers and N₂O reducers.

  相似文献   

Optimizing the application of dairy farm effluent and manure to mitigate gas emission     

Nartey  Obemah David  Liu  Deyan  Luo  Jiafa  Lindsey  Stuart  Di  Hong J.  Chen  Zengming  Yuan  Junji  He  Tiehu  Ding  Weixin 《Journal of Soils and Sediments》2021,21(6):2381-2393

Journal of Soils and Sediments - The impact of dairy farm effluent and manure applications upon gas emissions from soil is of concern for agronomic, ecological, and environmental reasons. Yet it...  相似文献   

Simulation of corn yields in the Upper Great Lakes Region of the US using a modeling framework     

Gene R. Safir  Stuart H. Gage  Manuel Colunga-Garcia  Peter Grace  Shapoor Rowshan 《Computers and Electronics in Agriculture》2008,60(2):301-305

We examined the utility of a site-based simulation model for corn (MAIZE) applied to the Upper Great Lakes Region (UGLR) of the United States for 1992–1996. To evaluate model outputs, we used a modeling applications system integrative framework (MASIF) to simulate corn yields in the UGLR. We divided the region into two ecological zones (upper UGLR-1 and lower UGLR-2) and compared MAIZE and USDA National Agriculture Statistics Service (NASS) yield estimates in each zone. There was greater agreement between MAIZE and NASS yields at lower yield values. As NASS yields increased, MAIZE yields also increased, but to a greater extent than did NASS yields. We conducted a mean spatial analysis of maize yield from 1992 to 1996. We also conducted a spatial analysis of 1994, 1995 and 1996. There are both spatial and temporal differences when yields are mapped.  相似文献   

Sun injury to cut potato seed     

W. C. Edmundson  C. F. Clark  C. H. Metzger  J. C. Miller  Wm Stuart  L. C. Young 《American Journal of Potato Research》1939,16(4):98-104

  相似文献   

The identity of “Jersey Red Skin” or “Red Skins”     

Wm. Stuart 《American Journal of Potato Research》1933,10(10):199-201

  相似文献   

The potato association of America loses a loyal member     

W. Stuart 《American Journal of Potato Research》1932,9(6):98-98

  相似文献   

Review of recent literature     

F. J. Stevenson  W. Stuart 《American Journal of Potato Research》1932,9(11):202-204

  相似文献   

Review of recent literature     

W. Stuart 《American Journal of Potato Research》1930,7(11):333-335

  相似文献   

Review of recent literature     

W. Stuart 《American Journal of Potato Research》1930,7(5):149-150

  相似文献   

Review of recent literature     

W. Stuart 《American Journal of Potato Research》1928,5(2):30-31

  相似文献