Deep stacking poultry litter as feed ingredient in livestock production

The compelling need to harness the potentials of the numerous agro-industrial by-products and the so-called “wastes” as part replacement for the more expensive conventional feed ingredients have been seriously expressed. This need has arisen mainly from the increasing demand and supply deficit of conventional feed resources with a concomitant sharp rise in their cost prices. The net effect of increased unit cost of the conventional feed resources is increased cost of the compounded rations, which by extension gives rise to increased cost of meat and animal products. It then becomes highly imperative that other sources for rapid livestock output to meet the growing human demands for animal protein foods are sourced. Such other sources should be cheap and nutritionally adequate for feeding animals with the aim of lowering the cost of producing meat. One of such measure is the recycling of poultry litter as part replacement for soya bean in livestock nutrition. Poultry litter is the by-product of poultry production, which should be managed in an environmentally friendly manner. As observed in this study, poultry litter contains 20% crude protein, 621.41 ME kcal kg^?1, and substantial amounts of minerals that could be exploited in feeding livestock. This study has explored the possibility of including poultry litter in diets in view of its contents.     

露天煤矿排土场工程地质勘察技术方法浅析

通过对露天煤矿排土场工程地质钻孔勘探的实际工作经验,简要阐明了露天煤矿排土场排弃物层在钻探过程中经常遇到的几个问题,详细论述了解决问题所应采取的技术方法与措施。     

东部平原地区湖泊湿地的恢复与可持续发展对策

湖泊湿地是我国的重要湿地生态系统,具有许多经济价值和社会服务功能,合理开发和利用湖泊湿地资源有利于促进我国广大湖区的可持续发展。结合有关东部平原地区湖泊湿地的研究,提出该区湖泊湿地的恢复与可持续发展对策,指出湖泊湿地的恢复应坚持生态、经济和社会可持续发展的原则,并根据具体的生态环境状况来进行,旨在为恢复与保护湖泊湿地的实际操作提供科学依据。     

在数字信号处理中二进制数量化引起的有限字长效应

在数字信号处理中,采用不同的二进制数的表示方法及量化方式,其误差相距甚远.本文首先分析二进制数的不同表示方式是产生有限字长误差的直接原因,然后对三种二进制数的表示方法及两种量化方式做了详细的说明及分析,同时,还利用MATLAB对不同量化方式的误差敏感性进行了分析,并针对具体问题进行了归纳和总结,提出了相应的解决方案.信号处理在林业森林生态信息处理以及林业生产安全信息处理等方面具有重要的意义.     

完善我国油气勘探资金筹措渠道的探讨

本文针对我国目前油气勘探资金贫乏、渠道单一的现象,提出了通过建立石油股票和债券市场实施公司投资,开辟地质市场和引进外资等方式来完善我国油气勘探资金的筹措渠道,以促进油气勘探业的发展。     

第一次全国污染源普查工业源普查基层工作方法探讨

结合工业污染源普查的基层工作经历,分析污染源普查特点和要求,对污染源普查的工作程序、工作方法等内容进行了探索性的研究。针对实际工作中存在的问题提出解决方案,并在清查、普查环节提出了重点工作内容和工作方式的改进,总结出一套工业源普查基层工作方式,为今后的污染源普查工作提供参考。