| 农田作物层温度初步研究—以冬小麦、夏玉米为例 |
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| 引用本文： | 董振国.农田作物层温度初步研究—以冬小麦、夏玉米为例[J].生态学报,1984,4(2):141-148. |
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| 作者姓名： | 董振国 |
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| 作者单位： | 中国科学院地理研究所 |
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| 摘 要： | 观测表明,充分供水的麦田作物层温度在一昼夜的大部分时间内,低于作物层顶以上1.5米处气温。8—10点叶温有时比气温稍高。叶温与气温差最大值出现在日落后至露出现前一段时间内,晴日无风天气大约出现在日落后一小时。白昼,夏玉米作物层温度高于气温,冬小麦作物层温度低于气温。夜间,小麦和玉米叶温都比气温低。土壤水分不足,蒸腾速率减小,叶温升高,叶温与气温差增大。叶温的变化反映了作物自身的水分状况。
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A PRELIMINARY STUDY ON THE CANOPY TEMPERATURE IN THE WINTER WHEAT AND THE SUMMER MAIZE FIELDS |
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| Dong Zhenguo.A PRELIMINARY STUDY ON THE CANOPY TEMPERATURE IN THE WINTER WHEAT AND THE SUMMER MAIZE FIELDS[J].Acta Ecologica Sinica,1984,4(2):141-148. |
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| Authors: | Dong Zhenguo |
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| Institution: | Institute of Geography; Academia Sinica |
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| Abstract: | Most of the observations show that canopy temperati re is lower than air temperature of 1.5m.above the canopy in the wheat fields with an adequate water supply during day and night.Smoetimes, leaf temperature is slightly higher than air temperature from 8:00-10:00 in the morning. The maximum difference between leaf temperature and air temperature occurs in the period from after sunset to before dewing. It occurs about one hour after sunset under calm,clear day. In daytime, the canopy temperature of summer m... |
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