淄博市小麦白粉病重发生原因及防治对策

分析了2007年淄博市小麦白粉病重发生的原因,并提出了相应的防治对策。     

川西北高寒沙化草地围栏禁牧时段和恢复过程的耦合机理研究

川西北沙化草地在围栏禁牧生态恢复过程中,土壤中有机质、全氮、水解性氮变化特征,研究对象为:未修复沙化草地、围栏禁牧生态恢复时间分别为5年、10年的沙化草地,研究其不同围栏禁牧时间沙化草地0～40 cm土层土壤中有机质、全氮、水解性氮的变化.其结果表明,随着围栏禁牧时间的增长,各土层土壤有机质、全氮含量均增加,植被盖度、...     

荒漠草原不同发育阶段柠条灌丛堆土壤真菌群落多样性特征研究

为了解荒漠草原柠条灌丛堆演化过程中环境微生物多样性变化与形成机理,以宁夏荒漠草原不同发育阶段的柠条灌丛堆为研究对象,采用高通量测序技术分析其土壤真菌的群落结构及多样性特征,探究发育阶段和土壤理化因子对土壤真菌群落结构和功能的影响因素。结果显示：获得的2662个真菌操作分类单元(Operational taxonomic unit, OTU)属于13门40纲524属,其中优势菌门为子囊菌门(Ascomycota,占77.48%～82.07%)、担子菌门(Basidiomycota,占7.42%～10.07%)以及被孢霉门(Mortierellomycota,占5.42%～10.78%);优势菌纲有粪壳菌纲(Sordariomycetes,占27.10%～36.23%)、座囊菌纲(Dothideomycetes,占25.69%～35.30%)、散囊菌纲(Eurotiomycetes,占12.64%～16.33%)、伞菌纲(Agaricomycetes,占7.07%～7.57%)。土壤有机碳、速效磷、总氮、电导率在柠条灌丛堆不同发育阶段不同部位有显著性差异,而总磷、pH无明显差异。在柠条灌丛...     

南方寡日照地区单体大棚棚型结构的改进及应用

针对贵州毕节寡日照的气候特点，对当
地推广面积大的塑料单体大棚棚型结构进行
改进，初步探索出适应南方寡日照地区设施蔬
菜生产的单体棚型结构及配套栽培技术。目
前，已建成的改进型大棚620 个，面积41.3
万m²，经济效益显著。     

不同甘蓝小孢子植株自然加倍率比较

利用流式细胞仪对4份甘蓝材料的24个小孢子植株进行小样本倍性检测.检测结果表明,小孢子植株倍性有4种类型:单倍体、二倍体、单倍同二倍嵌合体、二倍同四倍嵌合体.不同材料之间自然加倍情况有较大差别;利用花粉等主要形态鉴别法对大样本的小孢子植株进行倍性粗略判别,得出不同甘蓝材料的小孢子植株自然加倍率变化幅度为16.6%～100%.     

寡日照地区不同水肥管理对设施番茄生长、产量及经济效益的影响

以番茄为试材,研究了不同水肥管理对设施番茄生长、产量及经济效益的影响。结果表明:水肥一体化在提高番茄产量、节水、节肥、省工方面优势明显。番茄的产量得到保障和增加,增产16.22%;水分利用率提高了33.21%,节水率为21.89%,节省用肥39.50%,省工达12.20%;滴灌施肥比漫灌施肥明显降低大棚内的空气湿度;降低病虫害的发生,滴灌施肥农药用量减少21.05%。     

PFGE Genotyping and Serotype Analysis of Salmonella Isolated from Goose,Anserindicus and Cygnus

To understand the Salmonella epidemic characteristics and pulsed field gel electrophoresis（PFGE）genotyping of goose,Anserindicus and Cygnus,33 strains of Salmonella were serotype typed by PFGE and genotyped with BioNumerics 6.6 cluster analysis software.The results showed that there were 16 PFGE patterns,which displayed 6 strains Salmonella paratyphi C,19 strains Salmonella thompson,1 strains Salmonella paratyphi B,1 strain Salmonella irumu,1 strain Salmonella oslo,5 undifferentiated.PFGE similarity is about 53.7% to 100.0%,and most of the strains and anthropogenic strains similarity was more than 80%.The results showed that goose,Anserindicus and Cygnus Salmonella serotypes same PFGE type with a high degree of similarity,and possibly from the same clone,quite different serotypes PFGE band pattern difference.     

武隆县耕地烤烟生长适宜性研究

系统分析武隆县烤烟生产的现状,利用农业部测土配方施肥项目取得的相关基础数据,划分烤烟生长的不同适宜区,并通过构建武隆县烤烟生长评价指标体系,计算出武隆县耕地烤烟生产潜力的理论值为4.602×103kg/hm2,是当前武隆县植烟耕地实际生产水平的2.24倍。     

卵黄性腹膜炎、鸡白血病对种鸡死亡率、产蛋率影响的初步调查

为了探讨卵黄性腹膜炎和鸡白血病对种鸡死亡率和产蛋率的影响，在2016年1月至2017年4月中旬，对江苏省常州市某种鸡场岭南黄鸡、花鸡（金茅花鸡）、草鸡（金茅草鸡）、黄脚麻鸡4个品种鸡的发病及死亡情况进行临床症状观察及病理剖解；同时记录鸡场每日的鸡死亡数、产蛋数、每日免疫和用药情况，分析不同时期的死亡率和产蛋率，比较不同品种鸡的产蛋率及产蛋高峰期产蛋率与正常蛋鸡产蛋高峰期产蛋率（参考值80%）之间的差异。从死亡鸡的剖解结果来看，腹腔内卵黄凝固黏连在肠道上，输卵管肿大，充满白色或淡黄色干酪样物，初步诊断为卵黄性腹膜炎；肝脏和脾脏肿大，肠系膜或胸壁有肿瘤状物体，初步诊断为鸡白血病。岭南黄鸡产蛋后期的死亡率极显著高于产蛋上升期和高峰期（P<0.01），黄脚麻鸡产蛋后期的死亡率极显著低于产蛋高峰期（P<0.01）；花鸡、草鸡、黄脚麻鸡产蛋高峰期产蛋率平均值均低于60%，与参考值（80%）差异极显著（P<0.01）。综合试验结果，卵黄性腹膜炎和鸡白血病对鸡场影响严重，导致鸡死亡率上升，产蛋率下降；抗应激药和营养药可以起到缓解预防的作用，但无法根治，尚无有效的治疗方法。     

Clinical significance of immunohistochemically detecting forkhead box P3 expression in human astrocytic tumors

AIM: To investigate the expression of forkhead box p3 (FOXP3) protein in astrocytic tumors, and analyze its clinical significance.METHODS: We measured the incidence of FOXP3 in 121 astrocytomas, 5 meningiomas, 5 normal brain tissues using immunohistochemistry, analyzed the correlation of the presence of FOXP3 with histopathologic features and survival. RESULTS: FOXP3 exists in human brain astrocytic tumors, which was not found in meningioma and normal brain tissues. FOXP3 was expressed in interstitial lymphocytes mainly, and expressed in tumor cells rarely. The differences on FOXP3 expression between all grade levels were statistically significant (P<0.05). The Kaplan-Meier survival analysis showed that there was significant difference between the two survival curves, and the survival rate of the group with negative FOXP3 expression was higher than that of the positive group. Multivariate Cox proportional hazards regression analysis indicated that FOXP3 could not serve as an independent prognostic factor of astrocytic tumors survival time (P＞0.05).CONCLUSION: FOXP3 immunoreactivity is significantly associated with the age and the malignancy of human astrocytic tumors. Astrocytic tumor patients with FOXP3 expression have poorer prognosis, while FOXP3 can not serve as an independent prognostic factor of astrocytic tumors survival time. FOXP3 may provide a new target for immunotherapy of astrocytic tumors.