高铜、高锌日粮饲养效果的试验报告

用 8 2 9头杜长大三元杂交仔猪进行试验。试验结果表明,仔猪日粮中含有铜2 5 0mg/kg,锌(氧化锌)2 65 9mg/kg及铁 180mg/kg时,可提高平均日增重 2 4 2 5g左右,可降低耗料比 0 175左右,可使腹泻率下降 1 5 2 5个百分点左右。     

利用乙酸和H2O2去除污泥中铜锌的研究

采用易降解、低成本的乙酸和H2O2作为浸取剂，通过实验研究了乙酸浓度、H2O2填加量、温度、pH值等与城市污泥中铜和锌去除效果之间的关系。结果表明，在室温条件下，pH值为4的环境中，添加H2O2的浓度为2mol·L^-1的乙酸溶液，当污泥、H2O2、乙酸的固液比为1：2：50时，反应时间为4h，可以将污泥中超过95％以上的铜和锌淋滤去除。     

聚合硫酸铁制备研究

聚合硫酸铁是一种新型高效絮凝水处理剂．可用于生活用水、工业用水和城市污水的净化处理．研究了聚合硫酸铁的制备方法．从聚合硫酸铁制备反应温度、反应时间，反应比例以及氧化剂的用量等各方面因素的影响进行了探讨。     

动物铜中毒及防治

铜是动物必需的微量元素。铜盐是农业和医药领域广泛应用的药剂。在生产中，铜中毒屡见发生。本文概述了铜的代谢、铜中毒的机理、症状、病理变化，最后提出了防治措施。     

硫酸钠饮水对蛋鹌鹑生产性的影响

将18周龄朝鲜龙城系鹌720只随机分成4组,于饮水中分别添加2g/L、1g/L、0.5g/L、0g/L的硫酸钠溶液进行饲喂试验。结果表明:添加剂硫酸钠的3个试验组产蛋率和饲料转化率均高于对照组,添加量以0.5g/L经济效益最佳。     

利用绿得保生物制剂防治杨毒蛾幼虫试验初报

采用5种不同配比的绿得保、滑石粉混合粉剂对杨毒蛾幼虫进行了防治试验，结果表明，绿得保原药和滑石粉1：30杀虫效果达到92％以上，且防治成本较低。     

铜缺乏奶牛琥珀酸脱氢酶的组化特征

为探讨铜缺乏对奶牛心脏、肝脏、肾脏琥珀酸脱氢酶 (SDHase)组化特征 (分布特点及活性 )的影响 ,本实验选择铜缺乏症高发区自然发病的奶犊牛 6头 ,剖杀后采集心、肝、肾作冰冻切片及酶组化染色 ,以 6头同年生健康奶犊牛为对照。实验结果表明 ,发病组奶牛心脏中 SDHase计数值显著高于对照组 (P<0 .0 5 ) ,而肝脏、肾脏中SDHase计数值显著低于对照组 (P<0 .0 5 ) ;健康组奶牛心脏、肝脏、肾脏中 SDH活性扫描值均显著大于发病组(P<0 .0 5 )。发病奶牛组组织中 SDHase酶颗粒的分布也发生特征性的变化。结论 :氧化呼吸链关键酶活性的改变是导致奶牛铜缺乏症病理过程的重要原因     

Efficacy of a novel copper-based footbath preparation for the treatment of ovine footrot during the spread period

Objective: To determine the efficacy of a novel copper based footbath preparation (CHF-1020) for treatment of ovine footrot during the spread period.
Design: A series of field trials with treated and control groups run together.
Animals: Mobs of at least 125 sheep on each of six properties in southern New South Wales with equal numbers of controls.
Procedure: Sheep of group A were treated after minimal paring by making them stand in CHF-1020 for 15 minutes. Treatment was undertaken at intervals throughout the period of the trials (14 September to 17 December 1993). Group A sheep were run on the same pasture as those from group B (untreated sheep).
Results: The percentage of sheep exhibiting clinical signs of ovine footrot at the start of the trial ranged from 35 to 88% at score 3 or higher, using a 0 to 5 footscoring system. During the trial, the percentage of infected sheep (greater or equal to score 2) in group B increased and ranged from 40 to 90%. The level of infected sheep in group A on each property was reduced progressively to 1 to 16%. Cure rates of 45 to 94% were achieved, with the lowest rate being on a property with a metal footbath. The next lowest cure rate was 73%. Results indicated that treatment should be undertaken at 2-weekly intervals while spread continues. Treated sheep can be returned to contaminated pastures.
Conclusion: CHF-1020 is effective during the spread period and can be used for the progressive eradication of ovine footrot.     

断奶仔猪料中添加甲酸钙、杆菌肽锌及高铜的效果

试验采用Ｌ９（３４）正交设计，将３５日龄断奶的２７窝仔猪共２０７头，以窝为单位分成９组。试验因子为３个不同水平的甲酸钙（０，１，２％），杆菌肽锌（０，６３，１２６万效价单位／吨），及铜（０，７５，１５００ｐｐｍ）。４５～７５日龄期间进行饲养试验。结果表明，在４５～７５日龄期间，添加甲酸钙极显著影响（降低）猪的平均日增重（Ｐ＜０．０１）和经济效益；添加杆菌肽锌有利于仔猪的平均日增重，且以添加６３万单位／吨为宜。加铜后不显著影响猪的平均日增重（Ｐ＜０．１）。建议４５～７５日龄期间不再添加酸化剂。     

FORMATION OF WEATHERED PRODUCT AND DESTROYING EFFECT OF AN ANCIENT GROTTO IN BEISHAN

An ancient grotto has been seriously weathered in Beishan,Dazu county.Sichuan province.This paper studies and discusses the hydrologic-geochemical reaction and weathered rock mass due to subsidence of acid rainwater and groundwater permeation.The researchingresults show that a main factor caused to destroy the shallow surface layer of rock is swelling of the sulphate crystal.