农业工程学报2001，Vol.17Issue(3)：32-36,5.
宽地膜覆盖条件下土壤温度场特征
Field Characters of Soil Temperature Under the Wide Plastic-Mulch
李毅 1王文焰 1门旗 2钟新才 2谢香文2
作者信息
- 1. 西安理工大学水资源所,
- 2. 新疆农科院土肥所,
- 折叠
摘要
Abstract
Wide plastic film mulch has demonstrated obvious positive effect on soil temperature. A field experiment was conducted in Kuitun, Xinjiang, to investigate soil temperature dynamics for four scenarios: three within the mulch (clearance, middle and side), and one with the mulch removed. The variation of upper layer soil temperatures (5 cm deep) can be fitted as a sine function, and the daily variation can be characterized by three measurements at 8:00,16:00 and 20：00. For the upper layer soil in the planting season, the maximum temperature, maximum temperature fluctuation, and maximum average temperature all occurred under the middle of the mulch, which was followed in turn by the side and clearance of the mulch, and with the mulch removed. Soil temperatures of clearance, middle and side at different depths have their variation both in a day and in seasons. For different soil depths, the amplitude of temperature daily variation can be approximated as an exponential function of the depth.关键词
地温/宽地膜覆盖/温度场特征/日变幅分类
农业科技引用本文复制引用
李毅,王文焰,门旗,钟新才,谢香文..宽地膜覆盖条件下土壤温度场特征[J].农业工程学报,2001,17(3):32-36,5.
