陜西省宝鳮、戶县一带农村,大烟囱熏肥历史悠久。一、大烟囱的壘法大烟囱是在烧火做飯或烧炕取暖时,使原来朝天冒的烟通过土坯(胡基),烟在通过土坯时,即起了熏肥的作用。每个烟囱先备好土坯300~500个。制作土坯的土最好采用粘性土,一般疏松的表土含有机质多,熏后常有損失。因此采用底土来熏較为合算。垒烟囱时,在靠灶或炕的墙壁外面,用土坯立垒(不能 Shaanxi Province Baodi, Huxian rural areas, a large chimney smoked fertilizer has a long history. First, the large chimney basement method Large chimney is burning fire cooking or heating kang, so that the original smoke flying through adobe (Hu Ji), smoke through the adobe, that played a role of fertilizer. Each chimney ready for adobe 300 ~ 500. Adhere to the best use of clay adobe soil, generally loose surface soil contains more organic matter, often after the loss of smoked. Therefore, the use of subsoil to smoked more cost-effective. Base chimney, by the stove or kang outside the wall, with adobe stand (can not