本论文研制一种以空气为载热介质的太阳能空气集热-土壤蓄热的增温系统，应用于农业温室。
In this thesis, a new solar active heating system with air collectors collecting and soil heat storage is studied for greenhouses heating.
本论文以内蒙古自治区中部武川县为例，分析了当地农业经济特征及农村奶牛养殖业现状。
This paper discusses the agricultural economic features and the present situation of dairy farming based on a case study at WuChuan county located in central Inner Mongolia.
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