摘要
以未设置防寒沟和在前底脚设置防寒沟的辽沈I型日光温室为例 ,对土壤温度变化规律进行了试验研究。研究表明 ,在地面下 0 4m ,最低温度出现在温室的前底脚 ,其次是温室的后底脚 ,未设置防寒沟时最高温度出现在温室中部靠后 ,设置防寒沟时最高温度出现在温室中部靠前 ;在地面下 0 8m ,未设置防寒沟与设置防寒沟温室内外温度变化规律基本相同 ,说明防寒沟埋深0 8m是合理的 ,建议取 0 8m～ 1 2m ;对采用不同防寒沟材料对日光温室沿横向地温变化规律分析表明 ,吸湿性小、导热系数小、整体性好的聚苯板具有较好的保温隔热性能 。
Soil temperature changes were studied in solar greenhouse with cold-proof ditch and without cold-proof ditch in the fore foot. Results showed that at 0.4m underground the lowest temperature was in the fore foot and then in the back foot, and the highest temperature was in the behind-middle part without cold-proof ditch, but in the fore-middle part with cold-proof ditch . The changs of temperature between inside and outside of greenhouses with cold-proof ditch and without cold-proof ditch were similar at 0.8m underground, which showed that 0.8m depth of cold-proof ditch was suitable. So depth rage of cold-proof ditch could be 0.8m-1.2m. The comparison of different materials of cold-proof ditch showed that Polystyrene board had a good effect of heat preservation, whereas, slag had no prominent effect of heat preservation.
出处
《沈阳农业大学学报》
CAS
CSCD
2004年第5期595-597,共3页
Journal of Shenyang Agricultural University
基金
"十五"辽宁省攻关项目 (2 0 0 1 2 1 50 0 1 )
