城口县

城口县生态旅游可持续发展对策研究

A Study of the Sustainable Development of Ecotourism in Chengkou County

农商对接：农产品流通模式创新问题研究&基于重庆城口县和开县的调研

Research into innovative mode of agricultural products circulation & Based on survey on Chengkou County and Kaixian County of Chongqing

以“长治”工程重点县&城口县为例，研究其水土流失成因及治理模式。

In this paper , taking Chengkou county as an example , factors contributing to soil erosion were studied .

本文对拱桥的病害和成因进行了分析，对拱桥的加固方法进行了介绍，并以重庆城口县仁和大桥加固工程为例，详细阐述了增大截面加固法加固拱桥的设计计算原理和施工方法。

Ren river bridge of Chongqing reinforcement project as an example , elaborated the principles of design calculations and construction methods of increasing section reinforcement method of arch bridges .

从土壤的理化因子出发，利用综合评价的方法，对渝东地区城口县坪坝区大巴山南坡山地黄壤的土壤肥力变化特征与地上植被类型之间的关系进行了研究。

Based on the analyses of soil physical and chemical properties , this paper studied the relationship between plant community succession and fertility variation of mountain yellow soil in east Chongqing .