不同规格微型蒸渗仪测定土壤蒸发的试验研究

发布时间：2018-04-11 15:51

本文选题：高度 + 内径　；参考：《土壤通报》2017年02期

【摘要】：以陕北风沙土为研究对象,比较了微型蒸渗仪高度(10、15、20和25 cm)、内径(10和15 cm)和封底材料(薄铁皮和细纱布)对土壤蒸发测定结果的影响。结果表明,不同规格蒸渗仪测定的土壤蒸发量具有很好的相关性。当内径为10 cm时,土壤蒸发量的测定值随高度的增加而增加,高度为20 cm时的测定值显著大于10 cm时。当高度为10 cm时,将内径由10 cm增加至15 cm对土壤蒸发的测定没有显著影响。高度和内径一定时,将封底材料由薄铁皮换为细纱布时测定的土壤蒸发量显著增加。高度为20 cm时,土壤蒸发测定的精度最高,为98.5%,其次是高度为25 cm和15 cm时,精度分别为96.3%和93.5%。综合考虑精度和便捷性,推荐使用高度为20 cm、内径为10 cm且用薄铁皮封底的微型蒸渗仪。
[Abstract]:Taking the wind-sand soil of northern Shaanxi as the research object, the effects of the height of the mini-evapoosmograph 1010 ~ 1520 and 25 cm ~ (-1), the inner diameter of 10 ~ 15 cm ~ (-1) and the inner diameter of 10 ~ 15 cm ~ (15 cm) and the bottom material (thin iron sheet and fine gauze) on the results of soil evaporation were compared.The results showed that there was a good correlation between soil evaporation and soil evaporation with different specifications.When the diameter of soil was 10 cm, the measured value of soil evaporation increased with the increase of height, and when the height was 20 cm, the measured value was significantly greater than that of 10 cm.When the height was 10 cm, increasing the inner diameter from 10 cm to 15 cm had no significant effect on the measurement of soil evaporation.When the height and inner diameter are constant, the soil evaporation measured when the base material is changed from thin iron sheet to fine gauze is significantly increased.When the height is 20 cm, the precision of soil evaporation measurement is the highest, 98.5, followed by the height of 25 cm and 15 cm, the accuracy is 96.3% and 93.5%, respectively.Considering the accuracy and convenience, it is recommended to use a miniature steammeter with a height of 20 cm, an inner diameter of 10 cm and a thin iron sheet to seal the bottom.
【作者单位】：西北农林科技大学资源环境学院;西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院地理科学与资源研究所;
【基金】：国家自然科学基金资助项目(41530854,41571296)资助
【分类号】：S152.73

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