内蒙古东部新巴尔虎右旗泡状肝包虫病原种类及流行学调查

报道 1998～ 1999年在内蒙古东部呼伦贝尔盟新巴尔虎右旗 3个乡草场进行人兽共患泡状蚴病病原调查研究的结果 .沙狐 (Vulp es corsac)和布氏田鼠 (Microtus brandti)分别感染有多种泡状肝包虫的成虫和幼虫期 .其中有西伯利亚棘球绦虫 (Echinococcus sibiricensis)和多房棘球绦虫(Echinococcus multilocularis) ,并经人工感染试验证实它门是具不同发生学的两个独立种类 .布氏田鼠的泡状蚴平均感染率高达 2 %～ 19.0 2 % ,在不同地点和不同季节它们的感染率有所差别 .同时 ,在该草原布氏田鼠尚发现与其他棘球蚴不同的呼伦贝尔泡状蚴新种 (Alveolaris hulunbeierensis sp.nov.

明尼苏达被毛孢代谢物对大豆胞囊线虫二龄幼虫的影响

明尼苏达被毛孢是大豆胞囊线虫幼虫专性寄生真菌,是一类具有潜力的线虫生防资源。为了探讨明尼苏达被毛孢对大豆胞囊线虫的生防作用机制,实验室条件下,研究了明尼苏达被毛孢1-10代谢物原液及不同稀释液对大豆胞囊线虫二龄幼虫(J2)活性的影响和J2对大豆根浸出液及大豆根的趋性。结果表明:代谢物原液及其不同稀释度可以显著抑制J2活性,24 h时原液、5×、10×、20×和50×对J2致死率分别为91%、75%、50%、36%和31%,显著高于无菌水对照7.2%,且J2致死率随时间的延长而逐渐提高;J2在1-10代谢物最近处01 cm分布率最低,表明J2对1-10代谢物存在趋避性;J2在根浸出液最近处01 cm分布率最高,表明J2对根浸出液存在趋向性;在距处理液01 cm,J2对根浸出液/1-10代谢物混合液趋避性仍然十分明显;大豆幼根蘸代谢物影响下J2在距豆根01 cm分布率低于无菌水处理的幼根,且差异显著,说明1-10代谢物可以降低J2对大豆根的趋向性

灌水对大豆产量及化学品质的影响

采用田间小区试验,研究灌水对高油大豆和高蛋白大豆品种产量和品质的影响。试验结果表明,灌水使高油大豆的产量略有提高,较对照增产1.9%,对高蛋白大豆产量未表现出增产效果。灌水对不同品质的大豆蛋白质和脂肪含量影响不同,灌水可提高高油大豆品种脂肪含量,降低蛋白质含量。相反,灌水提高高蛋白大豆品种蛋白质含量,降低脂肪含量

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies