不同长度micro-lysimeters对测定土壤蒸发的影响

Effects of the different length micro-lysimeters on the evaporation

研究了 5 ,10 ,15 ,2 0 ,2 5 cm共 5种不同长度处理和内壁有孔、内外壁均有孔 2种处理由 PVC管制成的 micro- lysimeters对土壤蒸发的影响。结果表明 :降雨后 5 ,10 cm处理的土壤水分蒸发较快 ,15 ,2 0 ,2 5 cm处理的变化不明显 ,可以利用 15 cm长的 m icro- lysimeters测定土壤蒸发 ;壁上有孔处理的蒸发要高于同样长度的无孔处理。

In order to find the effects of different length micro lysimeters on evaporation,we design different length MLS including 5,10,15,20,25 cm and some MLS which have holes on the wall.The result indicates the evaporation of the MLS of 5,10 cm are faster than others at the beginning and the evaporation of MLS of 15,20,25 cm are similar,so we can use micro lysimeters of 15 cm length to measure the soil evaporation.We also found the evaporation of MLS with the holes are higher than the same depth MLS without holes on the wall.