基于“湛江群岛”的湛江区域发展格局构建

如何通过区域各类要素资源的有效整合,构建区域发展战略格局,推动区域社会经济的可持续发展一直是学术界研究的热点。本文以社会经济发展较为滞后的湛江市为例,通过实地调研和多方论证,在深入分析湛江市各类资源要素禀赋的基础上,首次提出了"湛江群岛"的概念,阐释了"湛江群岛"理念在推动湛江市区域社会经济发展过程中的重要意义。在此基础上,提出了基于湛江群岛的湛江市"岛湾港城"四位一体发展战略,强调通过提升岛屿、海湾、港口在湛江市社会经济发展中的战略地位,来加强湛江市港湾生态系统的保护,实现湛江港湾的统一管理,促进湛江海岛的生态协调发展。进而推动湛江市的产业一体化、海陆一体化和城乡一体化发展,最终将湛江市打造成为粤西地区新的增长极

干旱荒漠区肉苁蓉人工接种技术研究

目前肉苁蓉正处于野生种向栽培种驯化的初级阶段,肉苁蓉接种同步性差和接种成活率低是生产中的突出问题。本试验在不同起源的梭梭林内,使用不同质量的肉苁蓉种子,采用不同药剂处理、不同接种深度、不同接种方法、不同接种量等接种措施进行人工接种成功率对比试验。结果表明:用一、二级肉苁蓉种子、500ppmABT(3)号生根粉浸泡30分钟、4月上旬至5月中旬用营养诱导法接种、接种垂直深度与水平距离40-60cm之间接种成功率最高。这项研究将为肉苁蓉人工高效接种提供理论依据与技术支持

模拟高温过程对棉蚜存活率的影响/Effects of Different High Temperature on Survival Rate of the Cotton Aphid in Xinjiang[J]

[目的]探索高温如何影响棉蚜 Aphis gossypii Glover种群.[方法]室内研究不同温度(32、34、36、38、40和42℃;高温处理8 h)对棉蚜存活率的影响.[结果]棉蚜存活率随着温度的升高而降低;32、34和36℃对棉蚜存活率的影响没有差异,38℃棉蚜存活率显著降低;40和42℃棉蚜存活率接近零.相同处理时间条件下,棉蚜半数致死温度随着处理时间的延长而降低.[结论]棉蚜半数致死温度平均为38.3℃,为新疆棉蚜的预测与防治提供了依据

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