柴油机单体泵喷射控制EPS系统设计与试验

针对柴油机单体泵喷射系统高实时性要求,通过对单体泵控制原理的分析,采用位置同步、角度时钟驱动概念,设计了发动机位置同步系统硬件和喷射系统软件,最高喷射精度达到0.023 4℃A,电磁阀峰值和保持电流分别为12 A和8 A,试验结果表明,该系统不仅实现了快速精确控制喷油,而且具有冗余控制功能.     

竹腔注射甲胺磷防治竹虫综合效应评价

应用竹秆竹腔注射甲胺磷方法防治笋期、枝干、食叶害虫的效果均在90％以上,防治后对竹林害虫天敌影响小,不影响竹笋食用,成本也较低,宜在竹虫为害区推广应用。     

树木注射施药技术进展

】树木注射施药、施肥技术正在取得突破进展，施药器械已完成了由无压或低压、低浓度、大容量、低工效机型向高压、高浓度、低容量、高工效机型的转换；注射物扩大到了杀虫剂、杀菌剂、微肥、植物生长调节剂各个方面，并且取得了比喷雾、土施等常规技术好的使用效果；实现了是化学防治与天敌利用、生态保护相互协调的目的。     

扑杀病害奶牛时静松灵和敌敌畏联合应用效果观察

布鲁氏菌病（以下简称布病）和牛结核病为人畜共患病,我国将＂两病＂规定为二类动物疫病。尤其是布病对人畜普遍易感,且经接触、空气、黏膜多途径传播、感染,疫情发生后,按照＂检、杀、免、消＂的防治原则,进行科学的果断处置,使疫情得到控制,对提高人口质量,促进畜牧业健康发展具有极为重要的意义。在扑杀过程中,静松灵（Xylazine Hydrochloride Injection）和敌敌畏（DD-VP）的联合应用,成本低,省时省力,符合动物福利原则,虽不是完全的安乐死,但使动物痛苦得到了降低,值得推广。     

Live foals produced from sperm-injected oocytes derived from pregnant mares

Recently, in vitro fertilization (IVF) in the horse has met with less than anticipated results. Various problems associated with equine IVF include: (1) the inability to collect large numbers of good quality oocytes, (2) the alteration of the zona pellucida associated with in vitro maturation of equine oocytes, and (3) the improper preparation of equine sperm cells for IVF of these oocytes. Therefore, this study was conducted to achieve fertilization via sperm injection of equine oocytes and to produce live offspring from this IVF procedure. Oocytes were collected by transvaginal ultrasound-guided oocyte retrieval procedures from early pregnant mares of mixed breeds (day 14 to day 70 of pregnancy) and were matured in vitro and subjected to intracytoplasmic sperm injection (ICSI). Injected oocytes were then cultured for 48 hours in either TCM-199 or P-1 medium (glucose and phosphate-free medium) supplemented with 15% fetal bovine serum. Cleavage rates for embryos cultured in the two culture media were different (47% vs. 63% in TCM-199 and P-1, respectively). Also, four Grade 1 embryos were surgically transferred into the oviducts of four recipient mares (one embryo/mare) at 48 hours post-ICSI, with three pregnancies (75%) developing as ultrasonically demonstrated by the presence of an embryonic vesicle in the uterine body by day 16 post-ICSI. On June 23rd one live filly was born after 328 days of gestation and subsequently, a second healthy filly was born after 319 days of gestation. To our knowledge, this is the first report of live foals resulting from in vitro fertilization (via ICSI) of in vitro matured oocytes recovered from pregnant mares using an efficient, repeatable transvaginal ultrasound-guided procedure.     

阿莫西林钠对奶牛乳房炎的防治试验

对奶牛临床型乳房炎的治疗试验结果表明,以5 mg/kg体重,肌肉注射阿莫西林钠,1日2次,连用3 d,治愈率达91.3%,对奶牛隐性乳房炎的治疗结果表明:治疗组产犊后隐性乳房炎乳区阳性率分别为78.6%和7.1%,与青霉素-链霉素粉针药物对照组比较,差异显著(P<0.05)。     

"母犊素"对黄牛性别影响的研究

“母犊素”是一种生殖生理调控的激素类药品。喀什地区2004～2005年在6个县的68个冷配站实施“母犊素”的推广使用,目的在于改善冷配母牛母犊出生率偏低的现象,提高农牧民参与黄牛改良的积极性。项目实施参试牛只达3 500头,随机调查产犊头数1 618头,母犊率平均达到58．90％,比未使用“母犊素”处理的母牛产母犊率42．66％净提高16．24％,相对提高38．07％。试验证明,用“母犊素”处理配种母牛,不仅能大幅度提高母犊出生率,还能提高母牛的部分繁殖性能,值得在黄牛改良中推广应用。     

促进云南松母树林开花结实研究

云南松(Pinus yunnanensis)木材质量下降,其主要原因是用遗传品质低劣的种子造林。为保证云南松材质优良,提高林分经济价值,必须选用优质种子造林。优质种源基地建立以后,如何使母树早结实、多结实,作者在云南省永仁县白马河林场云南松母树林中进行了试验研究。经过四年的实施、观察、分析得出下列结论:对云南母树施氮肥,种子产量增加265％;施硼砂,种子产量增加175.32％;在树干上注射赤霉素和高锰酸钾,种子产量增加43.76％和87.66％;对云南松母树树冠适当修剪能改变树冠的形状,增加结实层和树冠表面积,这些措施既不会改变云南松的遗传特性,又能提高种子产量,在生产上简单易行,建议在林木种子生产部门试用。     

防治杨柳树飘絮措施探讨

分析了银川市杨柳树飞絮的成因和危害,总结了目前使用的注射药剂、高接换头、喷水、引进新品种、雌株主干重剪、树下种草、灌木6种治理技术,认为通过带有高压喷头的洒水车给杨树喷水是治理杨树飞絮的一种见效快、成本低的方法,从根本上解决柳树飞絮问题的方法是高位嫁接技术,更新杨柳树品种是解决杨柳树飞絮问题的一种可持续发展的治理方法。     

柱塞式两次喷油泵驱动凸轮的设计及其运动特性分析

参考一次喷油泵的设计手册,进行了两次喷油泵的驱动凸轮的改型设计,对凸轮的运动特性进行了分析,驱动凸轮能两次推动柱塞完成两次喷油的过程。