{"id":17338,"date":"2022-01-24T10:37:06","date_gmt":"2022-01-24T10:37:06","guid":{"rendered":"https:\/\/www.innovationnewsnetwork.com\/?p=17338"},"modified":"2022-02-28T14:07:41","modified_gmt":"2022-02-28T14:07:41","slug":"scientists-reveal-agricultural-practices-increase-ch4-n2o-production","status":"publish","type":"post","link":"https:\/\/www.innovationnewsnetwork.com\/scientists-reveal-agricultural-practices-increase-ch4-n2o-production\/17338\/","title":{"rendered":"Scientists reveal agricultural practices increase CH4 and N2O production"},"content":{"rendered":"
CAS noted that the inevitable rise of atmospheric CO2<\/sub> concentration plays an important role in regulating carbon and nitrogen cycling in the rice-cropping system. Illuminating the impact of elevated CO2<\/sub> concentration (ECO2<\/sub>) on CH4<\/sub> and N2<\/sub>O emissions from paddy fields is crucial for assessing the agricultural production response to climate change.<\/p>\n This study was led by Dr Guangbin Zhang, Jing Ma, and Hua Xu, from Institute of Soil Science, Chinese Academy of Sciences. Data extraction was conducted by Haiyang Yu, Tianyu Wang, Qiong Huang, and Kaifu Song, also from the Institute of Soil Science, Chinese Academy of Sciences.<\/p>\n The team analysed 175 independent observations that consisted of 112 groups of CH4<\/sub>, and 63 groups of N2<\/sub>O; this involved considering study sites and agricultural management.<\/p>\n The team found that elevated CO2<\/sub>\u00a0(ECO2<\/sub>) considerably increased CH4<\/sub>\u00a0emissions from rice fields by 23%, but it reduced N2<\/sub>O emissions by 22%. A longer duration of ECO2<\/sub>\u00a0(\u226710 years), ECO2<\/sub>\u00a0significantly reduced CH4<\/sub>\u00a0and N2<\/sub>O emissions by 27% and 53%, respectively.<\/p>\n Along with the increasing levels of ECO2<\/sub>, the stimulating effect of ECO2<\/sub>\u00a0on CH4<\/sub>\u00a0emissions showed a trend of weakening firstly and then strengthening, while its effect on N2<\/sub>O emissions changed from stimulation to inhibition.<\/p>\n “The results suggest that the responses of CH4<\/sub>\u00a0and N2<\/sub>O emissions to ECO2<\/sub>\u00a0might change with its duration and concentration gradients,” commented Hua Xu.<\/p>\n The researchers also elaborated that agricultural management practices such as nitrogen application rates, and straw incorporations, impacted the responses of CH4<\/sub>\u00a0and N2<\/sub>O emissions to ECO2<\/sub>. With no or half amount of straw incorporation, ECO2<\/sub>\u00a0increased CH4<\/sub>\u00a0emissions by up to 49% from paddy fields, respectively.<\/p>\n However, non-significant effects were observed from CH4<\/sub>\u00a0emissions under full straw incorporation. With the increasing amount of straw incorporation, the reductions in N2<\/sub>O emissions from paddy fields were enhanced by ECO2<\/sub>.<\/p>\nHow was this data collected?<\/h3>\n
What did the results reveal regarding CH4<\/sub> and N2<\/sub>O production?<\/h3>\n
What does this mean for agricultural practices?<\/h3>\n