微生物发酵饲料在畜禽养殖中的应用

微生物发酵技术在畜禽养殖中应用广泛,在改善饲料适口性、提高饲料利用率、减少环境污染、促进畜禽生长性能、提高畜禽免疫力、改善畜禽肉品质及繁殖性能等方面有重要作用。本文详述了微生物发酵饲料在畜禽养殖中的应用及微生物发酵饲料的发展前景。

过磷酸钙与双氰胺对猪粪便的堆肥效果研究

为研究过磷酸钙(SSP)与双氰胺(DCD)对猪固体粪便堆肥效果的影响,以猪场经固液分离后的固体粪便为原材料,分别以过磷酸钙和双氰胺为添加剂进行好氧堆肥试验,并测定堆肥前后各成分的变化。结果表明:经堆肥处理后,各处理组有机碳含量显著降低(P<0.05),与堆肥前相比SSP处理组、DCD处理组和对照组分别降低了12.64%、15.79%、8.38%,SSP和DCD均具有促进有机碳降解的作用,其中DCD处理效果最好;不同处理组全N含量均显著提升(P<0.05),但SSP处理组全N含量显著高于DCD处理组和对照组(P<0.05),处理后全N的含量为23.56 g/kg;堆肥后的总P含量SSP处理组显著高于DCD处理组和对照组(P<0.05),SSP处理组总P含量达到15.43 g/kg。因此,SSP和DCD均可作为添加剂加快堆肥中有机质的降解,提高堆肥产品中全N及全P的含量,其中添加SSP的堆肥效果较好,堆肥后可以作为氮肥有机肥进行施用。研究结果对猪粪堆肥中添加剂的选择具有一定的参考意义。

Biological Safety Issues in Animal Laboratory of Colleges and Universities

As a crucial link in fostering talented students, laboratories in universities have been attached great significance since they help developing practical op- erational ability of students. The unknown factors in laboratories are likely to pose threat to operators. Therefore, it is especially important to guarantee the safety of laboratories. The paper expounded the measures supposed to be taken in university lab-teaching based on bias-safety management problems and hoping to serve the research work and teaching by adopting proper and reasonable methods which are in accordance with scientific purposes.