| Analysis of temperature changes under film during cotton seedling stage in south Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2011.01.25 |
| Key Words: seedling stage film mulching soil temperature under film between films |
| Author Name | Affiliation | | WANG Weihua | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China | | WANG Quanjiu | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, Shaanxi 712100, China | | LIU Jianjun | Xinjiang Survey and Design Institute of Water Resources and Hydropower, Urumqi, Xinjiang 830000, China |
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| 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 layer under film increases from 8∶00 and decreases after achieving to the peak of 44℃ at 16∶00. T
he 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 pe
ak 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 so
il 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 temperat
ure. By analyzing soil temperature trend in seedling stage, it is found that film mulching can increase temperature and reduce the rate of temperature change th
us to avoid the damage to cotton caused by excessive temperature drop. |
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