论文部分内容阅读
(地理Ⅰ)P13大棚农业大棚农业是指通过采用现代化农业工程和机械技术建造大棚,人为改变自然环境,为农业生产提供相对可控制,甚至最适宜的温度、湿度、光照等环境条件,而在一定程度上摆脱对自然环境的依赖,进行有效生产的农业。大棚覆盖面积较大,空间大,热效较好,容易建造,且造价较低,是当前应用较广的保护设施。可种植高秧支架的瓜、果、豆类等蔬菜。一般比露地可提早收获20天～40天,秋后可延长生长期25天左右。随着工农业的发展和不断的革新,新的大棚类型及覆盖方式也将不断出现。当前应用的大棚,依其建
(Geography) P13 Greenhouses Greenhouses Agriculture refers to the construction of greenhouses through the use of modern agricultural engineering and mechanical technology, artificially changing the natural environment, providing relatively controllable and even optimum temperature, humidity and light conditions for agricultural production. To a certain extent, get rid of dependence on the natural environment and carry out effective production of agriculture. Greenhouses cover a larger area, large space, good thermal efficiency, easy to build, and lower cost, is currently widely used protection facilities. High seedlings can be planted melons, fruits, beans and other vegetables. Generally harvested earlier than the open field 20 days to 40 days, the autumn can extend the growing period of 25 days or so. With the development of industry and agriculture and continuous innovation, new types and coverage of greenhouses will also continue to emerge. The current application of greenhouses, according to their construction