羔羊全营养代乳粉对羔羊增重影响的试验   总被引：1，自引：0，他引：1  

魏荣安  范进江  张永胜  何其宏  刘家平  马春萍  陈玲香  库木斯汗 《畜牧兽医杂志》2003,22(1):4-6

为了研究羔羊出生后采取人工饲喂代乳粉溶液的效果，对10日龄羔羊称重，以平均日增重与母乳组比较，用t检验方法检验差异显著性。研究结果显示羔羊平均日增重试验组为0.097-0.126kg，母乳组为0.071-0.113kg，二者没有显著差异。在生产中，代乳粉能替代绵羊母乳饲喂羔羊，对多胎品系羊的推广应用以及解决绵羊缺乳、少乳或无乳问题具有重要意义。  相似文献   

初冬早春南昌郊区灯下常见蛾类活动情况纪实     

章士美  赵凤霞 《江西农业大学学报》1994,16(1):47-51

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Pheromone-based communication disruption ofAdoxophyes orana on peach using the new RAK 3+4 dispensers and their effect on development of fruit rot diseases     

E. Navrozidis  T. Thomidis  T. Sipouridis  I. Xatzicharisis  I. Fotiadis  D. Servis 《Phytoparasitica》2005,33(2):149-153

The effectiveness of the pheromone-based communication disruption method was examined against the summerfruit tortrix,Adoxophyes orana F.v.R. (Lepidoptera: Tortricidae), a pest of peach trees, using the new RAK 3+4 dispenser (BASF). NoA. orana males were captured in pheromone traps inside the experimental orchards, which were saturated with the RAK 3+4 dispensers. The percent of damaged leaves was practically zero, while the level of damaged fruits was 0–6% in pheromone-treated orchards. The percentage of fruit rot caused byMonilinia laxa was lower in pheromone-based communication disruption orchards than in the control. It was concluded that the RAK 3+4 dispenser could be used againstA. orana as an economical and environmentally friendly method.  相似文献   

棉铃虫性诱剂诱捕器的改进及其应用研究     

刘定忠  王荣龙  余昌喜 《中国植保导刊》2002,22(7):8-10

利用废弃的食用油油壶制成棉铃虫诱捕器,可提高诱蛾的效果。挡板距诱捕器器口的距离以3cm的效果最佳。与常规水钵、水盆诱捕器相比较,全年诱蛾总量分别增加116.3％和减少79.8％,但诱蛾灵敏度均高出18.72％。  相似文献   

模毒蛾性信息素应用技术研究     

高泽芬  陈国发  王鹏  张军生  周德宝  李洋 《中国森林病虫》2020,39(2):43-46

模毒蛾Lymantria monacha是内蒙古大兴安岭林区重大森林害虫。通过对模毒蛾性信息素诱捕器应用技术的研究显示:不同类型的诱捕器诱虫效果不同,圆筒型和船型诱捕器的诱捕效果较好,方形的较差;诱捕器设置高度对诱虫效果的影响不同,设置在树冠下层和中层的诱捕器诱捕效果较好,上层的较差;不同设置距离的诱捕器的诱虫效果不同,随着设置距离的增加,诱捕器的诱捕量逐渐下降,设置于距林缘50 m的诱捕器诱虫效果最好,性信息素诱捕器的最远引诱距离可能为280 m。研究结果为利用性信息素对模毒蛾进行种群监测和防治提供了依据。  相似文献   

基于田间空气中病菌孢子浓度的小麦白粉病病情估计模型研究     

闫征远  范洁茹  刘伟  周益林 《植物病理学报》2017,47(2):253-261

2014和2015两年度利用Burkard定容式孢子捕捉器监测了高感小麦白粉病品种京双16种植区和中感品种众麦2号种植区田间空气中的病菌孢子浓度变化动态,同时利用小型气象站监测了田间的气象因子,通过分析京双16和众麦2号种植区空气中孢子浓度与空气温度、湿度、降雨、风速和太阳辐射率的相关性,发现空气中的孢子浓度主要与空气温度呈显著的正相关性(r0.348 3,P0.05)。在此基础上,分别分析了田间病情与调查日期前累积孢子浓度、一周前累积孢子浓度、前一周累积孢子浓度和当周累积孢子浓度的关系,结果表明,中感品种众麦2号田间病情与累积孢子浓度的关系均呈指数关系,其中田间病情与调查日期前累积孢子浓度或一周前累积孢子浓度的拟合效果最好,而感病品种京双16的田间病情与累积孢子浓度多呈对数关系,其中病情指数与一周前累积孢子浓度的拟合效果最好。  相似文献   

Luminous Efficiencies of Common Light Sources of Road Lighting in Mesopic Lighting Level     

HU Ying-kui  CHEN Zhong-lin  LIU Ying-ying 《保鲜与加工》2007,(1):139-141146

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不同颜色粘虫板对葡萄园昆虫的诱集效应     

贾娜  刘靖  卢威成  冉隆贤  李静 《中国果树》2021,(2):31-35

为筛选出对葡萄害虫诱集效果好的粘虫板,选用黄色、蓝色、白色、紫色、绿色、红色、黑色和荧光色8种颜色的粘虫板对葡萄园内昆虫进行诱集试验。结果表明,共诱到昆虫7目18科22种,主要害虫有蓟马、蚜虫和叶蝉,其中蓟马数量占到昆虫总量的88.96%,天敌昆虫主要有寄生蜂、捕食性瓢虫、食蚜蝇和东亚小花蝽。紫板、蓝板和白板对蓟马的诱集效果强,黄板、荧光板和绿板次之,红板和黑板效果差;黄板对蚜虫诱集效果强,绿板和荧光板次之,黄板与其他色板之间差异显著;黄板、荧光板和绿板对叶蝉的诱集效果好,3种色板与蓝板之间差异不显著、与其他色板差异显著。白板、蓝板和黄板诱集到的天敌数量最多,占所有颜色粘虫板诱集天敌总量的69%左右。试验期间诱集到的昆虫益害比为0.036,各色板的益害比依次为黑色>荧光色>绿色>红色>黄色>白色>蓝色>紫色,其中紫板的益害比最低,仅为0.011。结合各色板的诱虫效果和益害比进行综合分析,建议选用紫板对蓟马进行诱杀,适时适量选择性使用黄板对蚜虫、叶蝉等进行诱杀。  相似文献   

Determination of Effective Degree-Day for Supporting Chemical Control Against Cutworms （Lep. Noctuinae） in the Sugar Beet     

Magdalena Jakubowska  Felicyta Walczak  JerzyJzefatLipa 《农业科学与技术》2012,(3):314-326

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Effects of different lighting on reproductive system in depressive female rats     

DI Guan-teng  WANG Sha-li 《园艺学报》2016,32(3):510-515

AIM: To investigate the effects of different lighting on the reproductive system in depressive female rats. METHODS: Healthy adult female rats were randomly chosen as control group, and the depressive adult female rats in SPF grade were randomly divided into 5 groups(7 rats each):depressive model group, sulfur lamp group, heat radiation lamp group, fluorescent lamp group and LED lamp group. After 45 d of continuous illumination, the estrous cycle was observed by the vaginal exfoliated cells, and the organ indexes of ovary and uterus were calculated. The concentrations of estiadrol(E₂), prolactin(PRL), progesterone(PROG) and testosterone(T) in the serum were detected by ELISA, and the histopathological lesion of ovary was observed under microscope with HE staining. RESULTS: The estrous cycle exhibited serious disorder, the ovaries exhibited serious congestion, and the organ indexes of ovary and uterus and the concentrations of E₂, PRL, PROG and T decreased significantly in the rats in depressive model group compared with control group(P<0.05). The estrous cycle and histopathological damage of ovary were obviously improved, and the concentrations of E₂, PRL, PROG and T were significantly increased after the sulfur lamp lighting in the depressive female rats compared with depressive model group. No obvious change and improvement of the reproductive functions in the heat radiation lamp group, fluorescent lamp group and LED lamp group was observed. CONCLUSION: The reproductive functions of depressive female rats are improved by sulfur lamp lighting.  相似文献