樟子松枯梢病的防治研究

樟子松移植苗枯梢病Sphaeropsis sapinea可以通过药剂有效地进行防治。移植前以50％多菌灵wp500倍液浸苗；在人工林中，内吸性杀菌剂－甲基托布津、多菌灵为首选药剂；在树木新梢生长停止期和展叶中期（辽西北为6月初和6月中旬），70％甲基托布津wp 1000倍液或50％多菌灵wp 500倍液防治2次。保护性杀菌剂－百菌清效果不佳。适时的卫生伐对该病有明显的抑制作用。     

阔叶树种的研究现状与江西研究的发展方向

通过对阔叶树种在我国及江西省的研究状况的论述，初步总结了阔叶树种的研究水平及研究方向，指出了江西省阔叶树种研究存在的问题，探讨了江西省今后阔叶树种研究的方向。     

中国高粱光温类型的初步研究

1、在短光照或温室条件件下高粱品种出苗～抽穗期日数显著缩短,供试品种平均比对照分别缩短12.5天和13.635天,缩短百分率分别为18.8和20.5;伴随苗穗期日数的缩短,叶片数在短光或温室条件下分别减少3.9和4.275片,减少百分数分别为22.24和24.22;株高分别降低60.15和47.65厘米,降低百分数为25.88和20.5,表明光、温直接影响高粱的生育进程和器官建成的数量与结构。 2、高粱品种生育日数变化主要反映在出苗～抽穗期。出苗～抽穗日数在短光或温室条件下分别减少18.8％和20.5％.而抽穗～成熟日数仅减少5.1％和8.3％,表明高粱出苗～抽穗期是光温反应的最大效应期。 3、不同品种在短光或温室条件下性状变化的趋势一致,但程度明显不同;同一品种同一性状在上述条件下变化程度也不同。根据供试品种对光温敏感的程度划为四大类群,其数量与地理分布如下: Ⅰ、光温敏感型,占试验品种总数的20％.分布在长江以北,辽宁以南地区。Ⅱ、温敏感型,包括温敏感光中度敏感型和温敏感光迟钝型,占25%,分布在黄河以北,北纬45℃以南的山西、内蒙、辽宁、河北北部和吉林南部。Ⅲ、光敏感型、包括光敏感沮中度敏感型和光敏感温迟钝型,占12.5％,分布在黄河(北纬35°)以南,南岭(北纬25°)以北地区。Ⅳ、中度敏感型占42.5％,分布广且没有明显的地带性。试验未发现对光、温都迟钝的类型。北方温敏感型品种较多,短日性较弱,南方光敏感型品种较多,短日性强、感温性中等或较弱。不同光温类型的形成、分布与其所处的生态环境即光温条件和栽培制度密切相关。 4、温敏感型和光敏感型中早熟品种较多,占86％,光温敏感型品种既有早熟的,中熟的、也有晚熟的,所以光温敏感的品种不一定全是早熟品种,而晚熟品种也并非对光温反应不敏感。中度敏感型品种也有早熟、中熟和晚熟之分。在不同光温条件和栽培制度下,不同光温类型熟性变化的主导因素不同。 5、光、温在形成高粱不同类型过程中的效应是相互联系而又有区别的,光、温效应对不同环境下的不同类型有主次之分,大小之别;光、温效应在高粱不同发育阶段既是同步性的,又是顺序性的。     

泡沫比例混合器在液下喷射灭火系统中的应用

提出了环泵泡沫比例混合器和泡沫压力比例混合器在相应灭火系统中的应用、安装和操作中应注意的问题，对两种泡沫比例混合器组成的系统进行了对比，认为环泵比例混合泡沫灭火系统采用正压进水，可以克服负压进水方式存在的缺陷，比较适合油库火灾的扑救；压力比例混合泡沫灭火系统灵活性、匹配性较差，适用于泡沫混合液流量相对不变的火灾扑救。     

The immunohistochemical detection of Mycoplasma bovis and bovine viral diarrhea virus in tissues of feedlot cattle with chronic, unresponsive respiratory disease and/or arthritis.

The purpose of this study was to determine the frequency of selected pathogens in the tissues of a group of feedlot cattle with chronic disease (most often respiratory disease and/or arthritis). Samples of lung and joint tissues from 49 feedlot animals that had failed to respond to antibiotic therapy were tested by immunohistochemical staining for the antigens of Mycoplasma bovis, Haemophilus somnus, Pasteurella (Mannheimia) hemolytica, and bovine viral diarrhea virus (BVDV). Mycoplasma bovis was demonstrated in over 80% of cases, including in 45% of joints and 71% of lungs tested. Mycoplasma bovis was the only bacterial pathogen identified in the joints. Haemophilus somnus and Pasteurella (Mannheimia) haemolytica were found in 14% and 23% of cases, respectively, and were confined to the lungs in all instances. Infection with BVDV was demonstrated in over 40% of cases. Mycoplasma bovis and BVDV were the most common pathogens persisting in the tissues of these animals that had failed to respond to antibiotic therapy.     

公共理论课教学状况调查数据的对比分析

为摸清我校公共理论课("两课")教学状况,提高公共理论课教学效果,我们曾分别召开了一系列座谈会,听取学生对公共理论课的意见、建议.同时,为获得更为准确的数据,以便有针对性地提出改进公共理论课教学的对策,我们分别进行了公共理论课教学状况书面问卷调查、网上问卷调查.     

关于我国海水网箱养鱼发展现状与危机分析及可持续发展的探讨

我国海水网箱养鱼发展现状是以个体联合体生产经营为主体的低技术水平的数量规模化，众多传统港湾已形成了大范围的严重超负荷养殖状态，其对环境巨大的污染力引发鱼病猖獗和频受赤潮侵袭，已面临严峻的养殖环境危机。本文综合分析了我国海水网箱养鱼的发展现状与负面效应及其现状危机，并初步进行了危机根源和可持续发展的讨论分析。     

Enhancement of sulfide auto-oxidation by metal ion in artificial seawater and a seawater which is a possible source of aoshio

SUMMARY: Aoshio is hypoxic milky blue-green seawater observed in some eutrophic bays. Previous studies have shown that colloidal sulfur causes the coloration and that the source of aoshio water is attributed to coastal anoxic bottom water. Occurrences of aoshio have been reported in limited areas of coastal seawater, although hypoxic transparent water seems rather universal. Promotion in auto-oxidation of sulfide by metal ions in seawater was investigated to explain the occurrences of aoshio. Artificial seawater containing 10 μM metal ion was assayed for the sulfide oxidation rate. The velocity constant which represents the oxidation rate within the initial 30 min and the amount of reacted sulfide in 2 h were determined by oxygen monitoring and sulfide quantification, respectively. Fe²⁺ and Cu²⁺ enhanced the initial 30 min reaction. Fe²⁺, Fe³⁺ and Ni²⁺ increased the amount of reacted sulfide in 2 h, forming whitish turbid water. Seawater from a suspected source of aoshio water was also assayed for the auto-oxidation rate of sulfide. The oxidation rate in water from 12 m depth was 13–19 times higher than the artificial seawater without an addition of heavy metal ions. More than 15% of the oxidation rate in 12 m deep seawater was explained by dissolved iron in the seawater.