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本试验用电子温度计,在重庆对田间旱作土,受控旱作土、水稻土的土温微变化,进行原位、原态、连续、自记测试,结果证明了作者1978年5月发现的土温微变化存在的事实。进而分析讨论了土温微变化的特点和可利用性,丰富了土壤温度研究的内容。土温微(分、秒)变化,主要受日照、天气状况、云片移动和土性、地形、被裸情况的影响。旱地土壤的T气、T表与太阳辐射呈同步微变,T_(-0.5)—T_(-5)与太阳辐射呈随步微变,往下随土壤深度的增加土温变化逐渐迟缓,并过渡到滞后时变。土温微变化明显的土层,一般为0—2(最大为5)厘米,出现时间多在9—19时(重庆时间)。土温微变分升温微变和降温微变,它们的分变化最大幅值不同,最大者可达5℃/分。表土、气温微变组合状况与即将来临的某种天气有很好的相关性,可作天气预报参数,为农业生产服务。
In this experiment, using electronic thermometer, in Chongqing on the field of dry soil, controlled dry soil, paddy soil temperature changes, in situ, original state, continuous, self-recording test, the results prove that the author in May 1978 found The fact that there is a slight change in soil temperature. Then the characteristics and availability of soil temperature changes are analyzed and discussed, which enriches the content of soil temperature research. Soil temperature micro (minutes, seconds) changes, mainly affected by sunshine, weather conditions, cloud movement and soil, topography, being nudity situation. The T-gas and T-table in the upland soil changed slightly synchronously with the solar radiation. The T_ (- 0.5) -T_ (-5) and the solar radiation showed a slight change along with the solar radiation. The soil temperature changed gradually with the soil depth increasing slowly Transition to lag change. Soil temperature changes slightly obvious soil, usually 0-2 (maximum 5) cm, appear more time in 9-19 (Chongqing time). Soil temperature micro-micro-temperature changes and micro-temperature changes, their maximum amplitude of different sub-changes, the largest up to 5 ℃ / min. Topsoil, a combination of slight temperature changes and a certain weather there is a good correlation, can be used for weather forecasting parameters for agricultural production services.