摘要
浮膜覆盖是近几年发展起来的一种新型覆盖栽培技术。该研究通过对浮膜覆盖区、薄膜覆盖区以及无覆盖对照区地温、气温的多点连续测量,利用调和解析的方法,分析了浮膜覆盖空间的温度变化特征以及和其它覆盖区的区别,并调查了浮膜覆盖对油菜生长发育的影响。研究结果表明,在北京春季晴天微风的情况下,浮膜覆盖区的白天(6:00～18:00)平均气温比无覆盖区高约7℃,晚间平均气温比无覆盖区高约3℃;从地表面到深度30cm的全天平均地温,浮膜覆盖区比无覆盖区高约2℃。根据调和解析的结果,深度10cm处的地温最大值出现的时间,浮膜覆盖区比无覆盖区晚约30min,薄膜拱棚区比无覆盖区则晚约90min。同样根据调和解析的结果,各区的地温不易层深度有明显差别,薄膜拱棚区为37.2cm,浮膜拱棚区和浮膜直接覆盖区的不易层深度分别为47.2cm和44.1cm,无覆盖区为50.6cm。
Floating mulch' is a newly developed protected culture technology. The characteristics of air temperature, soil temperatures under covers were analysed by harmonic analysis and the growthes of vegtable with and without floating mulch were also compared.
The day and night average air temperatures under floating mulch are higher about 7 ℃ and 3 ℃ than those without cover respectively in the spring at Beijing area. The average soil temperature from 0 cm to 30 cm of depth under floating mulch is higher ℃ than that of control area. As the results of harmonic analysis, the time of occuring maxmum soil temperature under floating mulch is 30 min late.compared with that of control area at 10 cm depth.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
1994年第4期125-130,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金
关键词
浮膜覆盖
地温
气温
蔬菜
生长发育
Floating mulch Harmonic analysis Non-woven fabrics
