干旱地区农业研究2011，Vol.29Issue(1)：139-145,7.
南疆棉花苗期覆膜地温变化分析
Analysis of .temperature changes under film during cotton seedling stage in south Xinjiang
摘要
Abstract
The temperatures of film-mulched soil and that without mulching in cotton seedling stage in Xinjiang Bazhou Irrigation Experiment Station are compared. The temperature of the 5 cm soil la℃er under film increases from 8: 00 and decreases after achieving to the peak of 44℃ at 16:00. The temperature vs. the time curve can be fitted well by the sine function and it shows that the occurrence of the peak temperature gets increasingly later with the increase of soil depth. The difference between the soil temperature under film and that between films increases first and then decreases,and the time of the peak occurrence is delayed by the depth of the soil, and the changing amplitude tends to be stable with the increase of soil depth. The temperature of the 5 cm soil layer increases by 13℃ under film from 8:00 ～ 12:00 while by 8.5 ℃ between films, indicating that film mulching has good effects on improving soil temperature. By analyzing soil temperature trend in seedling stage, it is found that film mulching can increase temperature and reduce the rate of temperature change thus to avoid the damage to cotton caused by excessive temperature drop.关键词
苗期/覆膜/地温/膜下/膜间Key words
seedling stage/ film mulching/ soil temperature/ under film/ between films分类
农业科技引用本文复制引用
王卫华,王全九,刘建军..南疆棉花苗期覆膜地温变化分析[J].干旱地区农业研究,2011,29(1):139-145,7.基金项目
国家科技支撑计划项目(2007BAD38B00) （2007BAD38B00）
国家863项目"水盐调控精量灌溉技术"(2006AA100207) （2006AA100207）
