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本文研究用沙覆盖土壤对抑制土壤水分蒸发的作用。在土柱上分別覆盖0、2、6厘米厚的沙层,用1.1和0.55厘米/日潜在蒸发率测定。测定了不同处理的土壤水分随深度的分布,所研究的5种处理为:对照(不覆沙);6厘米厚粗沙覆盖(C_6);6厘米厚细沙(F_6);2厘米厚粗沙(C_2);2厘米厚细沙(F_2)。试验进行35天后,在日潜在蒸发为1.1厘米时,对照C_6、F_6、C_2、F_2累计蒸发量分别为6.79、1.50、1.55、3.76和4.62厘米,在日潜在蒸发量为0.55厘米时,相应为6.68、0.95、1.21、2.71、4.28厘米。研宄表明:覆盖有效的顺序是:C_6>F_6>C_2>F_2>对照。
This paper studies the effect of sand covering soil on the inhibition of soil moisture evaporation. The soil columns were covered with 0, 2, and 6 cm thick sand layers, respectively, at a potential evaporation rate of 1.1 and 0.55 cm / day. The distributions of soil moisture with depth of different treatments were measured. The five treatments studied were as follows: control (no sand cover); 6 cm thick coarse sand cover (C_6); 6 cm thick sand (F_6); 2 cm thick Sand (C_2); 2 cm thick sand (F_2). After the experiment for 35 days, the cumulative evaporation of C_6, F_6, C_2 and F_2 were 6.79, 1.50, 1.55, 3.76 and 4.62 cm respectively when the potential evaporation was 1.1 cm. At the potential evaporation of 0.55 cm, the corresponding cumulative 6.68, 0.95, 1.21, 2.71, 4.28 cm. Research shows that the coverage order is: C_6> F_6> C_2> F_2> control.