Two Village Ecosystems in the Upper Minjiang River, China： A Comparison of Emergy Flow

By using the concept of emergy and method of emergy analysis, this paper has studied two mountain settlement (village) ecosystems in two aspects: input and output of energy in the agro-systems and the use of fuel energy. The result reveals that the settlement agro-system in the valley of Minjiang River is better in both structure and function than that at the so-called half-high mountain. The former one is higher than the latter one regarding such indices as emergy yield ratio, labor productivity of emergy and emergy sustainable index, but lower than the latter one regarding environmental loading ratio. In terms of fuel emergy, the settlement in the valley enjoys more diversified sources and is less depending on bio-energy while the settlement at the half-high mountain has only one source (i. e. fuel wood), much depending on bio-energy, may exert a greater pressure on environment.     

我国古代立体农业的理论和实践

本文介绍了人类从事农业生产，从简单到复杂模拟自由界生物群落繁衍，生长的简单历较详细地论述了古代农书中有关立体农业的和实践，供我们进一步建立，发展现代立体农业参考。     

广西农业科研院所科技开发现状、问题和对策研究

全面系统总结分析了广西农业科研院所科技开发现状，归纳出五大主要技术开发类型和目前科技开发存在的７个主要问题；提出了广西农业科研院所科技开发的十大措施与对策．     

关于建立合理的川西北草地农业生态经济系统若干问题的探讨

应用农业生态经济系统的理论，对川西北草地的现状进行了分析，该区存在的主要问题是：组分失调、流程不畅、利用层次单一、系统封闭保守和经营意识不强等问题，建立高效、优质、高产的川西北草地农业生态经济系统，必须调整组分、疏通流程、挖掘各生产层次潜力、强化外延特性，同时还必须加强该地区智力、物质技术投入，提高农牧民文化素质，普及科学技术，发展草地生产力。