In 2000,the species and diversity of carabids beetle were investigated by pitfall trap in 14 land-use treatments of Dongbeiwang agroecosystem in Beijing.The treatments included woodlots,field margins,wheat/corn fields...In 2000,the species and diversity of carabids beetle were investigated by pitfall trap in 14 land-use treatments of Dongbeiwang agroecosystem in Beijing.The treatments included woodlots,field margins,wheat/corn fields and vegetable fields with different cultivation measures.Analysis of variance (ANOVA) showed that the irragation,fertilization and straws have no effect on the diversity of carabid community;the number of species and individual number of carabid community in the woodlots,field margins were higher than these in the fields;the field margins had positive effect on the diversity and richness of carabid community in their adjacent field;moderation disturbance was beneficial for higher individual number of carabid community.It is concluded that field margin are necessary to maintain a diverse predatory carabid community in agroecosystem.展开更多
重症急性胰腺炎（acute severe pancreatitis,SAP）当前仍然是一个病死率高、并发症严重、临床治疗棘手、恢复需时较长的疾病;外科治疗经过半个多世纪的徘徊,对手术的位置与作用的认识已有深刻的改变,外科的微创化与个体化已成共识,微...重症急性胰腺炎（acute severe pancreatitis,SAP）当前仍然是一个病死率高、并发症严重、临床治疗棘手、恢复需时较长的疾病;外科治疗经过半个多世纪的徘徊,对手术的位置与作用的认识已有深刻的改变,外科的微创化与个体化已成共识,微创外科的前提建立在挽救性命、保护功能、促进愈合的损伤控制（damage control）的理念上,展开更多
文摘In 2000,the species and diversity of carabids beetle were investigated by pitfall trap in 14 land-use treatments of Dongbeiwang agroecosystem in Beijing.The treatments included woodlots,field margins,wheat/corn fields and vegetable fields with different cultivation measures.Analysis of variance (ANOVA) showed that the irragation,fertilization and straws have no effect on the diversity of carabid community;the number of species and individual number of carabid community in the woodlots,field margins were higher than these in the fields;the field margins had positive effect on the diversity and richness of carabid community in their adjacent field;moderation disturbance was beneficial for higher individual number of carabid community.It is concluded that field margin are necessary to maintain a diverse predatory carabid community in agroecosystem.
文摘重症急性胰腺炎（acute severe pancreatitis,SAP）当前仍然是一个病死率高、并发症严重、临床治疗棘手、恢复需时较长的疾病;外科治疗经过半个多世纪的徘徊,对手术的位置与作用的认识已有深刻的改变,外科的微创化与个体化已成共识,微创外科的前提建立在挽救性命、保护功能、促进愈合的损伤控制（damage control）的理念上,
