目前我国农业发展投入产出效率相对较低,对环境影响较大,探求农业绿色可持续发展路径是当前发展农业的关键。构建农业绿色全要素生产率影响因素指标体系,对2007—2017年10年间的相关数据加以分析。通过EBM模型和Moran s I指数(莫兰指数...目前我国农业发展投入产出效率相对较低,对环境影响较大,探求农业绿色可持续发展路径是当前发展农业的关键。构建农业绿色全要素生产率影响因素指标体系,对2007—2017年10年间的相关数据加以分析。通过EBM模型和Moran s I指数(莫兰指数)分析我国除台湾、香港、澳门之外各省(市、区)的农业绿色全要素生产率水平,采用空间杜宾模型(spatial Dubin model,SDM)探讨各因素的重要性及直接效应和间接效应,并针对农业绿色发展转型路径提出建议。分析结果表明,我国农业绿色全要素生产率体现出明显的地区差异,其中东部相对较高;注重农村教育、调整农业产业结构是实现农业绿色发展的重要因素;间接效应的影响程度较大,对农业发展转型有着重要的作用。展开更多
Transcriptome assemblies for the stomach,midgut,and fecal mucosa of Tachypleus tridentatus and Carcinoscorpius rotundicauda are reported for the first time in this study.Genome assembly resulted in 373069 unigenes wit...Transcriptome assemblies for the stomach,midgut,and fecal mucosa of Tachypleus tridentatus and Carcinoscorpius rotundicauda are reported for the first time in this study.Genome assembly resulted in 373069 unigenes with an N50 of 1314,while transcriptome assembly resulted in 736378 unigenes and an N50 of 2121.The annotated unigenes showed the highest similarity to fishes,amphibians,and reptiles,with most unigenes closely related to metabolism,translation,biogenesis,signal transduction,energy production,immune response,and secretion.Unigenes(4768)were mapped to KEGG pathways,and the most enriched pathways were involved in translation,environmental information signal processing,metabolism,endocrine system,immune system,nervous system,and varying metabolism.Totally 65889,2001,and 7162 differentially expressed genes(DEGs)were identified in the stomach,midgut,and fecal mucosa between the two horseshoe crab species,respectively.Compared with C.rotundicauda,99.95%of the DEGs in the T.tridentatus stomach were down-regulated,while 99.97%of the DEGs of T.tridentatus fecal mucosa and 55.42%of the DEGs of the T.tridentatus midgut were up-regulated.Most midgut DEGs were involved in hydrolase activity,protein metabolism,and cell cytoplasm,while most stomach and fecal mucosa DEGs were involved in catalytic activity and primary metabolic processes.Most stomach DEGs were assigned to the cellular component in cellular macromolecular complexes,while most fecal mucosa DEGs were assigned to the cellular component in cell and cell parts.These results will benefit the investigation of the molecular mechanisms of the digestive tract related to the feeding habits and environmental traces of horseshoe crabs.展开更多
文摘目前我国农业发展投入产出效率相对较低,对环境影响较大,探求农业绿色可持续发展路径是当前发展农业的关键。构建农业绿色全要素生产率影响因素指标体系,对2007—2017年10年间的相关数据加以分析。通过EBM模型和Moran s I指数(莫兰指数)分析我国除台湾、香港、澳门之外各省(市、区)的农业绿色全要素生产率水平,采用空间杜宾模型(spatial Dubin model,SDM)探讨各因素的重要性及直接效应和间接效应,并针对农业绿色发展转型路径提出建议。分析结果表明,我国农业绿色全要素生产率体现出明显的地区差异,其中东部相对较高;注重农村教育、调整农业产业结构是实现农业绿色发展的重要因素;间接效应的影响程度较大,对农业发展转型有着重要的作用。
基金the Scientific Research Project of Huaqiao University(No.605-50X18005)the Guangxi BaGui Youth Scholars Programthe Guangxi Recruitment Program of 100 Global Expert。
文摘Transcriptome assemblies for the stomach,midgut,and fecal mucosa of Tachypleus tridentatus and Carcinoscorpius rotundicauda are reported for the first time in this study.Genome assembly resulted in 373069 unigenes with an N50 of 1314,while transcriptome assembly resulted in 736378 unigenes and an N50 of 2121.The annotated unigenes showed the highest similarity to fishes,amphibians,and reptiles,with most unigenes closely related to metabolism,translation,biogenesis,signal transduction,energy production,immune response,and secretion.Unigenes(4768)were mapped to KEGG pathways,and the most enriched pathways were involved in translation,environmental information signal processing,metabolism,endocrine system,immune system,nervous system,and varying metabolism.Totally 65889,2001,and 7162 differentially expressed genes(DEGs)were identified in the stomach,midgut,and fecal mucosa between the two horseshoe crab species,respectively.Compared with C.rotundicauda,99.95%of the DEGs in the T.tridentatus stomach were down-regulated,while 99.97%of the DEGs of T.tridentatus fecal mucosa and 55.42%of the DEGs of the T.tridentatus midgut were up-regulated.Most midgut DEGs were involved in hydrolase activity,protein metabolism,and cell cytoplasm,while most stomach and fecal mucosa DEGs were involved in catalytic activity and primary metabolic processes.Most stomach DEGs were assigned to the cellular component in cellular macromolecular complexes,while most fecal mucosa DEGs were assigned to the cellular component in cell and cell parts.These results will benefit the investigation of the molecular mechanisms of the digestive tract related to the feeding habits and environmental traces of horseshoe crabs.