A growing global demand exists to formulate plans to lessen the greenhouse gas emissions produced by agricultural activities.The purpose of this study was to uncovered the changes in soil CO_(2)fluxes under varying sc...A growing global demand exists to formulate plans to lessen the greenhouse gas emissions produced by agricultural activities.The purpose of this study was to uncovered the changes in soil CO_(2)fluxes under varying scenarios including nitrogen fertilization rates,irrigation rates,and air temperatures in the Hetao Irrigation District(HID)over the 38-year period.DAYCENT model was used to predict carbon dioxide(CO_(2))fluxes from cultivated soils in the HID,Inner Mongolia from^(2)023 to 2060(the year of achieving the"carbon neutrality"goal)in this study.Results showed that mean soil CO_(2)fluxes in the sunflower field[1035.13 g/(m^(2).yr)]were significantly lower than those in the maize field[1405.54 g/(m^(2).yr)].An increase in nitrogen fertilization rate led to a significant escalation in soil CO_(2)fluxes.Moreover,elevating irrigation rates for washing salts by irrigation(WSBI)diminished soil CO_(2)fluxes in the sunflower field while amplifying them in the maize field.A rise in air temperature resulted in an increase in soil CO_(2)fluxes from the maize field,with annual increases observed,but a reduction in soil CO_(2)fluxes from the sunflower field.The sunflower fields in the HID have a more substantial advantage than the corn fields in mitigating soil CO_(2)emissions.展开更多
Hydrogel-based electronic skins or triboelectric nanogenerator(TENG)are considered ideal candidates for flexible electronics.However,current hydrogels face limitations that lead to suboptimal performance,and their rel...Hydrogel-based electronic skins or triboelectric nanogenerator(TENG)are considered ideal candidates for flexible electronics.However,current hydrogels face limitations that lead to suboptimal performance,and their reliance on external power sources hampers their practical application.A two-step washing approach comprising of“salt soaking”and“salt washing”is introduced to fabricate the multifunctional hydrogel.Initially,the hydrogel framework(SAC_(2)Z)-acrylamide(AM)and silk fibroin(SF)hydrogel is formed via salt soaking.Subsequently,the crosslinking degree is fine-tuned by adjusting the salt ion concentration through salt washing.The obtained hydrogel SAC_(2)ZC possesses excellent mechanical properties(a 15-fold increase in fracture strength to 320 kPa)and excellent cold resistance up to-80℃.Compared to conventional water-dispersible hydrogels,strain sensors based on SAC_(2)ZC are capable of sensing up to-30℃.The flexible antifreeze battery based on SAC_(2)ZC has excellent dendrite resistance and could supply power under high pressure(30 MPa)and severe bending(180°).The SAC_(2)ZC-based TENG(C-TENG)enables energy harvesting,eliminating reliance on external power sources.This innovation paves the way for flexible sensing systems that integrate energy collection and storage,facilitating all-weather human-smartphone signal interaction.This research provides a new strategy to develop multifunctional SAC_(2)ZC hydrogel for flexible wearable devices,especially in extremely cold complex environments.展开更多
基金Supported by Natural Science Foundation of the Inner Mongolia Autonomous Region(2020MS04001)Inner Mongolia Autonomous Region Science and Technology Program Project+1 种基金Hetao College Science and Technology Research Project(HYYB202303)Hetao College Science and Technology Innovation Team.
文摘A growing global demand exists to formulate plans to lessen the greenhouse gas emissions produced by agricultural activities.The purpose of this study was to uncovered the changes in soil CO_(2)fluxes under varying scenarios including nitrogen fertilization rates,irrigation rates,and air temperatures in the Hetao Irrigation District(HID)over the 38-year period.DAYCENT model was used to predict carbon dioxide(CO_(2))fluxes from cultivated soils in the HID,Inner Mongolia from^(2)023 to 2060(the year of achieving the"carbon neutrality"goal)in this study.Results showed that mean soil CO_(2)fluxes in the sunflower field[1035.13 g/(m^(2).yr)]were significantly lower than those in the maize field[1405.54 g/(m^(2).yr)].An increase in nitrogen fertilization rate led to a significant escalation in soil CO_(2)fluxes.Moreover,elevating irrigation rates for washing salts by irrigation(WSBI)diminished soil CO_(2)fluxes in the sunflower field while amplifying them in the maize field.A rise in air temperature resulted in an increase in soil CO_(2)fluxes from the maize field,with annual increases observed,but a reduction in soil CO_(2)fluxes from the sunflower field.The sunflower fields in the HID have a more substantial advantage than the corn fields in mitigating soil CO_(2)emissions.
基金supported by the National Natural Science Foundation of China(52273095)the Outstanding Youth Project of Zhejiang Provincial Natural Science Foundation(LR22E030002)+2 种基金the Key Research and Development Program of Zhejiang Province(2022C01049)the Open Fund of State Key Laboratory of Biobased Fiber Manufacturing Technology(SKL202301)the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(KF2314)。
文摘Hydrogel-based electronic skins or triboelectric nanogenerator(TENG)are considered ideal candidates for flexible electronics.However,current hydrogels face limitations that lead to suboptimal performance,and their reliance on external power sources hampers their practical application.A two-step washing approach comprising of“salt soaking”and“salt washing”is introduced to fabricate the multifunctional hydrogel.Initially,the hydrogel framework(SAC_(2)Z)-acrylamide(AM)and silk fibroin(SF)hydrogel is formed via salt soaking.Subsequently,the crosslinking degree is fine-tuned by adjusting the salt ion concentration through salt washing.The obtained hydrogel SAC_(2)ZC possesses excellent mechanical properties(a 15-fold increase in fracture strength to 320 kPa)and excellent cold resistance up to-80℃.Compared to conventional water-dispersible hydrogels,strain sensors based on SAC_(2)ZC are capable of sensing up to-30℃.The flexible antifreeze battery based on SAC_(2)ZC has excellent dendrite resistance and could supply power under high pressure(30 MPa)and severe bending(180°).The SAC_(2)ZC-based TENG(C-TENG)enables energy harvesting,eliminating reliance on external power sources.This innovation paves the way for flexible sensing systems that integrate energy collection and storage,facilitating all-weather human-smartphone signal interaction.This research provides a new strategy to develop multifunctional SAC_(2)ZC hydrogel for flexible wearable devices,especially in extremely cold complex environments.
