[ Objective] The paper was to explore the field evaluation system for resistance of sweet potato stem nematode. [ Method ] The resistance of 52.5 acces- sions was evaluated using naturally induced identification metho...[ Objective] The paper was to explore the field evaluation system for resistance of sweet potato stem nematode. [ Method ] The resistance of 52.5 acces- sions was evaluated using naturally induced identification method in diseased field from 2004 to 2009, and the accessions with resistance were selected. [ Result ] The field evaluation system for resistance of sweet p6tato stem nematode was affected by many factors. Non-uniform incidence in fields led to unstable identification results of certain materials. For test problems, some parameters of the existing evaluation system were corrected to reduce the experimental error. E Conclusion The study provided the reference for further improvement of field evaluation system for resistance of sweet potato stem nematode.展开更多
为研究溶液pH值对微晶纤维素(MC)水热炭化进程、水热炭物理化学特性(产率、固碳率、热值、亲水性、芳香性)及表观形貌的影响规律,MC为原料,以反应溶液pH值分别为3.0、4.0、5.0、6.0、7.0、8.0、9.0、10.0、11.0,在220℃,4 h条件下进行...为研究溶液pH值对微晶纤维素(MC)水热炭化进程、水热炭物理化学特性(产率、固碳率、热值、亲水性、芳香性)及表观形貌的影响规律,MC为原料,以反应溶液pH值分别为3.0、4.0、5.0、6.0、7.0、8.0、9.0、10.0、11.0,在220℃,4 h条件下进行水热炭化实验。通过元素分析pH值对水热炭理化特性的影响,并结合范式图综合分析pH值对MC水热炭化反应进程的影响,利用扫描电子显微镜(SEM)观察水热炭表观形貌。结果表明:水热炭产率和固碳率随酸性的增强而减弱,pH值为3.0时,产率及固碳率最小,分别为35.5%、41.82%,热值达到最大,为19.11 MJ/kg,HC3(hydro-char from pH of 3.0)芳香性最好,HC11(hydro-char from pH of 11.0)亲水性最强,碱性和中性水热炭芳香性、亲水性相似,不同pH值条件下的炭化进程均以脱水反应为主;SEM显示酸性水热炭微球粒径随酸性的增强而减小,纤维素在碱性条件下炭微球粒径均匀度较好。展开更多
基金Supported by Agricultural Science and Technology Innovation Funds of Jiangsu Province[CX(12)2030]
文摘[ Objective] The paper was to explore the field evaluation system for resistance of sweet potato stem nematode. [ Method ] The resistance of 52.5 acces- sions was evaluated using naturally induced identification method in diseased field from 2004 to 2009, and the accessions with resistance were selected. [ Result ] The field evaluation system for resistance of sweet p6tato stem nematode was affected by many factors. Non-uniform incidence in fields led to unstable identification results of certain materials. For test problems, some parameters of the existing evaluation system were corrected to reduce the experimental error. E Conclusion The study provided the reference for further improvement of field evaluation system for resistance of sweet potato stem nematode.
文摘为研究溶液pH值对微晶纤维素(MC)水热炭化进程、水热炭物理化学特性(产率、固碳率、热值、亲水性、芳香性)及表观形貌的影响规律,MC为原料,以反应溶液pH值分别为3.0、4.0、5.0、6.0、7.0、8.0、9.0、10.0、11.0,在220℃,4 h条件下进行水热炭化实验。通过元素分析pH值对水热炭理化特性的影响,并结合范式图综合分析pH值对MC水热炭化反应进程的影响,利用扫描电子显微镜(SEM)观察水热炭表观形貌。结果表明:水热炭产率和固碳率随酸性的增强而减弱,pH值为3.0时,产率及固碳率最小,分别为35.5%、41.82%,热值达到最大,为19.11 MJ/kg,HC3(hydro-char from pH of 3.0)芳香性最好,HC11(hydro-char from pH of 11.0)亲水性最强,碱性和中性水热炭芳香性、亲水性相似,不同pH值条件下的炭化进程均以脱水反应为主;SEM显示酸性水热炭微球粒径随酸性的增强而减小,纤维素在碱性条件下炭微球粒径均匀度较好。