The addition of silicon(Si)and organic fertilizers to soil conditioners can inhibit the transfer of heavy metal ions from soil to crops.However,it is not clear how Si and organic fertilizers affect soil properties and...The addition of silicon(Si)and organic fertilizers to soil conditioners can inhibit the transfer of heavy metal ions from soil to crops.However,it is not clear how Si and organic fertilizers affect soil properties and the micro-ecological environment and thereby reduce cadmium(Cd)accumulation in rice.In this study,the effects of L-type soil conditioners containing Si and organic fertilizers on bacterial and fungal community diversity,soil pH,organic matter,and available Si were analyzed with field experiments at two sites in Liuzhou City and Hezhou City,respectively,in Guangxi,China.With the increase of Si and organic fertilizer content in soil conditioner,rice yield respectively increased by 16.8–25.8 and 6.8–13.1%,and rice Cd content decreased significantly by 8.2–21.1 and 10.8–40.6%,respectively,at the two experimental sites.Soil microbiome analysis showed that the increase in abundance of Firmicutes and Actinobacteriota bacteria associated with Cd adsorption and sequestration,and Basidiomycota fungal populations associated with degradation of macromolecules favored the inhibition of soil Cd activity(soil exchangeable Cd decreased by 14.4–14.8 and 18.1–20.6%).This was associated with an increase in organic matter and Si content caused by applying soil conditioners.In conclusion,L-type soil conditioners,rich in Si and organic fertilizer,can reduce soil Cd bioavailability by regulating the dominant Cd passivating flora in the soil and ultimately reduce Cd accumulation in rice.展开更多
目的方便人事部开展招聘工作,便于应聘者申请岗位和了解应聘情况。方法该系统采用Visual Studio 2015开发环境、C#语言、JS框架、SQL Server(2015)数据库等,用三层架构模式完成。按照岗位要求与个人信息相匹配,只允许符合岗位基本条件...目的方便人事部开展招聘工作,便于应聘者申请岗位和了解应聘情况。方法该系统采用Visual Studio 2015开发环境、C#语言、JS框架、SQL Server(2015)数据库等,用三层架构模式完成。按照岗位要求与个人信息相匹配,只允许符合岗位基本条件的用户申请。结果管理员在线审核材料,应聘者不需要邮寄纸质材料到医院,直接在线登记信息和上传材料。结论人事招聘登记系统将机械、繁琐、重复、多样的材料审核、收集工作转变为标准化、结构化提高人事招聘工作效率。展开更多
基金supported by the National Natural Science Foundation of China(31560122)the Guangxi Key Laboratory of Agro-Environment and Agric-Products Safety,China。
文摘The addition of silicon(Si)and organic fertilizers to soil conditioners can inhibit the transfer of heavy metal ions from soil to crops.However,it is not clear how Si and organic fertilizers affect soil properties and the micro-ecological environment and thereby reduce cadmium(Cd)accumulation in rice.In this study,the effects of L-type soil conditioners containing Si and organic fertilizers on bacterial and fungal community diversity,soil pH,organic matter,and available Si were analyzed with field experiments at two sites in Liuzhou City and Hezhou City,respectively,in Guangxi,China.With the increase of Si and organic fertilizer content in soil conditioner,rice yield respectively increased by 16.8–25.8 and 6.8–13.1%,and rice Cd content decreased significantly by 8.2–21.1 and 10.8–40.6%,respectively,at the two experimental sites.Soil microbiome analysis showed that the increase in abundance of Firmicutes and Actinobacteriota bacteria associated with Cd adsorption and sequestration,and Basidiomycota fungal populations associated with degradation of macromolecules favored the inhibition of soil Cd activity(soil exchangeable Cd decreased by 14.4–14.8 and 18.1–20.6%).This was associated with an increase in organic matter and Si content caused by applying soil conditioners.In conclusion,L-type soil conditioners,rich in Si and organic fertilizer,can reduce soil Cd bioavailability by regulating the dominant Cd passivating flora in the soil and ultimately reduce Cd accumulation in rice.
文摘目的方便人事部开展招聘工作,便于应聘者申请岗位和了解应聘情况。方法该系统采用Visual Studio 2015开发环境、C#语言、JS框架、SQL Server(2015)数据库等,用三层架构模式完成。按照岗位要求与个人信息相匹配,只允许符合岗位基本条件的用户申请。结果管理员在线审核材料,应聘者不需要邮寄纸质材料到医院,直接在线登记信息和上传材料。结论人事招聘登记系统将机械、繁琐、重复、多样的材料审核、收集工作转变为标准化、结构化提高人事招聘工作效率。
