干旱对咸宁市楠竹林生长的影响及减灾恢复措施

针对2013年成宁市罕见的旱灾,通过深入实地调查,分析了当前竹林干旱的现状,并提出了相应的应对措施.     

气象条件对寒亭芦笋生长的影响

[目的]气象条件对寒亭芦笋生长的影响.[方法]通过对寒亭历年温度、日照时数和降水量等因素的分析,研究气象条件对芦笋生长的影响,并针对不利于芦笋生长的灾害性天气,提出了相应的预防或补救措施.[结果]寒亭气象条件优越,气候温和,四季分明,雨量集中,雨热同期,土地肥沃,污染少,日照充足,满足高产量高质量芦笋生长的需要,非常适用于芦笋的种植.[结论]该研究为在寒亭推广芦笋的种植提供可靠的科学依据.     

Gender Differences of Oxidative Stress Biomarkers and Erythrocyte Damage in Well-Trained Horses During Exercise

The aim of this study was to determine the effects of gender differences on the blood oxidative stress biomarkers, antioxidant defenses, and resistance of erythrocytes to hemolytic agents of trained horses before and after exercise. The study was carried out on nine mares and 14 stallions of Ukrainian Warmblood well-trained horses, involved in jumping, eventing, and dressage. Oxidative stress biomarkers, antioxidant defenses, and osmotic resistance of erythrocytes were assessed. Trained stallions showed a decrease in lipid peroxidation and higher glutathione reductase activity, whereas mares presented a higher superoxide dismutase activity after exercise. The resistance of erythrocytes was similar in female and male. No statistically significant differences were observed in the percentage of hemolyzed erythrocytes between after and before exercise. A correlation between the oxidative stress biomarkers and antioxidant defenses in the stallions after exercises were observed, which may indicate a protective response of superoxide dismutase and catalase against exercise-induced oxidative stress.     

安徽江淮地区梅雨季节（水灾）对养猪业的影响及防灾减灾措施

安徽省江淮地区位于长江和淮河之间,气候温润,农业生产发达,养猪是农业生产中的一项传统产业、该地区每年梅雨季节经常会出现连续较长时间的暴雨,造成高温高温,不仅给人们生活造成不便,也给养殖业特别是养猪业带来了巨大的损失。因此,当地的养殖户要引起高度重视,做好各项预防和应对措施。文中对安徽江淮地区的地理环境、养殖业现状及水灾对养猪业的影响进行了详细阐述,并在此基础上提出了预防和应对措施,以期为广大养殖工作人员今后预防和应对水灾提供参考。     

Symbol Expression of Allocation in Ancient Villages

On the vast land of China there are still some ancient Villages scattered, which were formed under some specific historical situations.Due to the limitations such as geographical and transport factors,these ancient villages have been little affected by the construction boom outside,keeping the original shape,architectural style and even the plain and simple customs until now.During the course of location selection and village formation, the traditional culture of the villagers has been embodied into the substantial system of the village and has become the important part of the village culture.The study on the ancient village-the prototype of city inhabitation-will contribute to understanding the trace of city development,that is,the concept of city planning and designing transforms from the functionalism to humanism approach.It is endowed with further cultural connotation promoting the continuous development of the city. In this paper, the external form of traditional culture in the ancient villages were inquired into from four aspects:the thought of "gendu"(farming and study) culture, the idea of village defense,the concept of "lishui" culture and the notion of "fengshui" culture.     

茉莉酸甲酯对水稻白叶枯病的诱导抗性及相关防御酶活性的影响

为探索茉莉酸甲酯(methyl jasmonate,MeJA)诱导水稻抗白叶枯病的效应,采用MeJA喷雾处理剪叶接种法,测定MeJA对水稻幼苗的白叶枯病病情指数、白叶枯病病菌Xanthomonas oryzae pv.oryzae的抑菌效果及对叶片过氧化物酶(peroridase,POD)、过氧化氢酶(catalase,CAT)、超氧化物歧化酶(superoxide dismutase,SOD)、多酚氧化酶(polyphenol oxidase,PPO)和苯丙氨酸解氨酶(phenylalnaine ammonialyase,PAL)等相关防御酶活性的影响.0.05 ～ 2.0 mmol/L的MeJA能降低水稻幼苗白叶枯病的病情指数,但对水稻白叶枯病菌无直接抑菌活性;0.1 mmol/L MeJA的诱导效果最好,处理48h后,感病品种温229和抗病品种嘉早312的诱导效果分别为73.18％和70.43％;0.05 ～2.0mmol/L的MeJA处理水稻叶片中POD、CAT、SOD、PPO和PAL活性呈上升趋势.研究表明MeJA能诱导水稻幼苗对白叶枯病的抗性,且诱导抗性的产生与MeJA提高水稻相关防御酶的活性有关.     

对大杜鹃30多年研究的综述:知识积累和未来展望(英文)

在欧洲,有超过125种宿主鸟类的巢里都发现有大杜鹃(Cuculus canorus)的卵,但其实常被大杜鹃寄生和利用的宿主种类并不多。寄生不同宿主的大杜鹃可分成显著不同的宿主专一类群(gentes),迄今欧洲已有超过20种宿主专一类群被报道。每一类群的大杜鹃雌鸟所产的卵的颜色和卵形(如斑点)都较为一致,并专门寄生某一特定的宿主鸟。宿主专一类群可同域出现,也可因为地理隔离而不同,甚至仅局限于宿主分布区的某一区域。不同的宿主专一类群可通过卵的不同而加以区分,在大多数情况下,每一宿主专一类群的卵都模拟其寄生的宿主的卵。为什么一些雀形目鸟类被寄生,而另一些却不被利用?为什么同一宿主种群内一些个体能识别和拒绝杜鹃卵,而另一些个体却接受?为什么同一宿主鸟的不同地理种群对杜鹃卵的识别和拒绝变化很大?大杜鹃不同的宿主专一类群之间的差异到底有多大?本文根据目前已有的知识探讨了这些问题,并对未来的研究进行了展望。     

南美牛鹂宿主的反寄生防御行为(英文)

牛鹂(Molothrus属,拟鹂科)是一个单起源的类群,包括现存的5种寄生性繁殖鸟类。啸声牛鹂(M.rufoaxillaris)、巨牛鹂(M.oryzivorus)和紫辉牛鹂(M.bonariensis)主要分布在南美。其中,啸声牛鹂与紫辉牛鹂分别代表较古老和最近进化的两个支系,因此有着各自不同的与宿主协同进化的历史。本文研究了紫辉牛鹂的宿主莺鹪鹩(Troglodytes aedon)的拒卵行为,同时综述了以上3种牛鹂的不同宿主的反寄生防御行为。3种牛鹂的宿主均能识别和拒绝非模拟的寄生卵,其中巨牛鹂和紫辉牛鹂的大部分宿主用嘴叼卵,而啸声牛鹂的主要宿主栗翅牛鹂(Agelaioides badius)则用脚扔掉寄生卵。比紫辉牛鹂小的宿主,在遭遇寄生时则不扔卵,也不弃巢。有些宿主比另一些宿主种类对寄生的牛鹂更具有攻击行为。啸声牛鹂的宿主还能够识别非模拟的寄生雏鸟。我们的结果说明,尽管与牛鹂协同进化的历史不同,大部分牛鹂的宿主已经进化出不同类型的反寄生防御对策。