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Integrated agronomic practice management decreases soil carbon emission and increases environmental ecological benefits of summer maize

引用

Pedosphere 2023年第4期33卷 649-658页

作者： Ningning YU Baizhao REN Bin ZHAO Peng LIU Jiwang ZHANG State Key Laboratory of Crop Biology and College of Agronomy Shandong Agricultural UniversityTai'an 271018(China)

Integrated agronomic practice management(IAPM)is an effective strategy for increasing nitrogen(N)use efficiency(NUE)and yield during crop *** various studies have evaluated the mechanism of a single agronomic management practice to increase yield and production efficiency and decrease environmental costs,few have investigated the effects of IAPM systems.A field experiment was conducted using four IAPM systems,a local smallholder farmers’practice system(T1),an improved management system(T2),a high-yield production system(T3),and an optimized management system(OMS),to study the annual yield,greenhouse gas(GHG)emissions,carbon(C)footprint(CF),and net environmental ecological benefit(NEEB)of summer *** results revealed that OMS was the most advantageous choice of IAPM,which increased yield and NUE and reduced GHG emissions and *** OMS,yield and NUE were 42.6%and 88.1%higher,and N_(2)O,CO_(2),and CH4 emissions were on average 35.4%,5.8%,and 156.5%lower,respectively,than those under *** the four IAPM systems,OMS resulted in the best soil quality,the lowest soil bulk density,the highest soil C/N ratio,and the highest soil total organic C content,which contributed to reduced GHG *** footprint and cost were the lowest under OMS,which decreased fertilizer input and GHG *** management system reduced CF and C cost by 5.9%and 33.9%,respectively,and increased NEEB by 111.4%compared to *** T3 had the highest yield,it also had the highest GHG emissions and *** conclusion,OMS delivered a high yield and NUE while mitigating negative environmental impacts and increasing ***,OMS is a suitable management system to increase the productivity and sustainability of summer maize.

关键词： carbon cost carbon footprint greenhouse gas emissions net environmental ecological benefit nitrogen use efficiency optimized management system soil quality

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