饲喂仔幼兔适宜料型和颗粒规格的研究

用齐卡新西兰兔、德国白兔与四川白兔的杂交兔，观测了不同料型（颗粒和粉料）、不同规格（直径４ｍｍ和６ｍｍ）的颗粒料补饲仔兔的效果和对幼兔生长发育的影响，结果表明：仔兔补饲及７０日龄龄前的幼兔宜饲喂直径４ｍｍ的颗粒料。颗粒补饲仔兔明显优于粉料，日增重（３０克）显著（Ｐ〈０．０５）高于粉料组（２６克），饲料转化率亦高于粉料。７０日龄前的幼兔饲喂细颗粒料可明显提高增重，改进饲料报酬；而颗粒直径大小对７０日     

不同抗生素组合对哺乳仔猪生产性能及肠道菌群的影响

选择20窝仔猪,随机分为5组,每组4窝,研究饲料中添加不同抗生素组合对哺乳仔猪生产性能和肠道菌群的影响,形成5个处理,即:土霉素 阿美拉霉素组、金霉素 黄霉素组、土霉素 黄霉素组、喹乙醇 黄霉素组、磺胺嘧啶 三甲氧苄胺嘧啶组。分别在21、35日龄取粪样进行大肠杆菌、乳酸杆菌测定。结果表明:在哺乳前期,各不同抗生素组合对仔猪日增重影响不显著(P>0.05),在哺乳后期,50 mg/kg土霉素 20 mg/kg黄霉素组对日增重影响显著(P<0.05),试验全期100 mg/kg喹乙醇 20 mg/kg黄霉素组抗腹泻效果显著(P<0.05);21、35 d,磺胺嘧啶 三甲氧苄胺嘧啶能显著(P<0.05)抑制大肠杆菌,喹乙醇 黄霉素组乳酸杆菌高于其他组。     

"武运粳7号"芽苗(乳苗)抛播稻群体质量特点与产量的研究

以“武运粳7号”为材料,通过不同稻作方式生产力比较试验,阐明了芽苗(乳苗)抛播稻茎蘖动态、干物质积累与分配、源库关系及产量形成特点,并提出了芽苗(乳苗)培育等关键栽培技术。     

西杂哺乳犊牛补饲方法试验报告

本研究选用４４头１０日龄西杂二代犊牛，随机分成试验组和对照组，试验组定时定量补饲饲配合饲料，且喂以干麦草和混合料，研究犊牛增重效果。结果表明，在补饲人，试验组和对照组的平均日增重分别为８３８和４８７ｇ；头均补饲草料量无显著差异；头均盈利分别为７８８和４７６元。试验组件和出栏时间比对照组提前增年至一年。西杂占在哺乳期积累补饲培育，具有良好的增重效果和明显的经济效益。     

Neem oil as a potential seed dresser for managing Homopterous sucking pests of Okra (Abelmoschus esculentus (L.) Moench)

Insecticidal seed treatment is an alternative method to spray and granular applications. It can protect the crop right from germination to reproductive stage. Recurrent use of chemical insecticides destabilizes the ecosystem and enhances the development of resistance in pest population. Use of biopesticides like neem oil (NO) is a promising one in this situation. Two field experiments were conducted to test the efficacy of NO as a seed dresser (20 ml kg⁻¹) and the effect was compared with systemic chemical insecticides imidacloprid (7 g kg⁻¹) and carbosulfan (7 g kg⁻¹) and Pseudomonas fluorescens (10 g kg⁻¹). Field studies revealed that the neem oil 60EC (C) (NO 60EC (C)) recorded minimum population of sucking pests Leafhopper—Amrasca biguttula biguttula Ishida and Aphids—Aphis gossypii Glover (Homoptera: Cicadellidae and Aphididae), i.e., below the ETL (2 number per leaf) up to 45 days after sowing and provided better yield compared to control. Although the systemic chemical insecticide imidacloprid performed better by recording 11,280 and 11,580 kg ha⁻¹ of marketable fruit yield, NO 60EC (C) also recorded about twofold increase in marketable fruit yield 11,000 and 10,620 kg ha⁻¹, respectively, in 2001 and 2002 experiments. Results of this study suggest that NO could be used as a potential seed dresser for managing sucking pests in okra.     

苏北垦区大豆田中国菟丝子生物学特性及防除

苏北垦区大豆田中国菟丝子幼苗出土分散，苗期生命力脆弱，发生蔓延与温度、雨水、杂草及耕作、轮作制度等关系密切，且具有“转株寄生”，“自寄生”和“断肢再生”等习性，是大豆毁灭性的寄生杂草。以合理轮作、耕作、播前种子处理和消灭杂草等农业措施为基础，以化学防除为主要手段的综合防除技术可以达到控制其为害的目的。     

World Association for the Advancement of Veterinary Parasitology (W.A.A.V.P.) guidelines for evaluating the efficacy of ectoparasiticides against biting lice, sucking lice and sheep keds on ruminants

These guidelines have been prepared to assist in the design, implementation and interpretation of studies for the assessment of the efficacy of ectoparasiticides against biting and sucking lice and sheep keds on ruminants. Information is provided on the selection of animals, dose determination, dose confirmation and field studies, record keeping and result interpretation. These guidelines advocate the use of pen facilities for dose determination and dose confirmation studies for defining therapeutic and persistent efficacy. These guidelines are also intended to assist investigators on how to conduct specific experiments, to provide specific information for registration authorities involved in the decision making process, to assist in the approval and registration of new ectoparasiticides, and to facilitate the world-wide adoption of standard procedures.     

气吸式排种器吸孔气流场的有限元分析

运用ANSYS有限元分析软件对影响气吸式排种器吸种效果的吸孔气流场进行了仿真和试验研究。仿真分析了吸孔形状、孔径及吸种导程对吸种效果的影响,并在排种器试验台上对仿真结果进行了验证。结果表明:吸孔直径越大,吸种效果越好;锥形孔的吸种效果优于直孔和沉孔;吸孔导程对吸种效果影响不大,只起到了调整和稳定气流的作用。     

不同酸化剂对哺乳仔猪增重效果的影响

在哺乳期分别对约×互仔猪灌服不同酸化剂，进行２５天试验。结果：灌服乳香酸组、下边酸组与对照组相比，哺乳仔猪平均日增重分别提高４２．３０％（Ｐ＜０．０１）和降低３３．２６％（Ｐ＜０．０１），经济效益分别增长３６．５０％和下降３６．４８％。     

IDS法处理马尾松种子之原理和效果

本文分析不同质量马尾松（Pinus massonianal Lamb.)种子在同等条件下的吸、失水速率及显培养时达到湿平衡所需时间。据此，用IDS法（I＝培养[incubation],D=干燥[drying],S=分离[separete]对发芽率74％、发芽势57％的马尾松种子进行处理，剔除掉样品中死种子后，剩下种子的室内发芽率提高到92％，发芽势提高到81％。活力测定表明，IDS处理对马尾松种子活力不带来坏的影响，相反大幅度提高了种子活力指数。