砒砂岩添加对风沙土有机碳储量的影响

Effect of Adding Soft Rock on the Organic Carbon Storage of Aeolian Sandy Soil

指出了毛乌素沙地区域水土侵蚀严重,通过添加砒砂岩可以改进沙土的进一步沙化。将砒砂岩与沙按照0∶1、1∶5、1∶2和1∶1(CK、C1、C2和C3)进行复配,对有机碳储量进行了研究。结果表明:各土层间的有机碳含量分布分别为0~10 cm(3.56 g/kg)>10~20 cm(3.45 g/kg)>20~30 cm(3.11 g/kg)。0~10 cm、10~20 cm和20~30 cm土层的平均容重为1.71 g/cm^3、1.94 g/cm^3和2.13 g/cm^3,随着土层的加深土壤容重发生显著变化。随着砒砂岩比例的依次增加,土壤有机碳储量逐渐增加,其中CK、C1和C2处理间无显著差异,C3较CK处理显著增加了41.62%。可见砒沙岩添加量为50%时,沙地有机碳储量增加显著。

The soil and water erosion in the Mu Us sandy area is serious,and the further desertification of the sand can be improved by adding arsenic sandstone.In this study,arsenic and sand were compounded according to 0∶1,1∶5,1∶2,and 1∶1(CK,C1,C2,and C3)to study organic carbon storage.The results showed that the distribution of organic carbon content between soil layers was 0~10 cm(3.56 g/kg)>10~20 cm(3.45 g/kg)>20~30 cm(3.11 g/kg).The average bulk density of 0~10 cm,10~20 cm and 20~30 cm soil layers are 1.71 g/cm^3,1.94 g/cm^3 and 2.13 g/cm^3,and the soil bulk density changes significantly as the soil layer deepens.With the increasing proportion of arsenic sandstone,soil organic carbon storage gradually increased.Among them,there was no significant difference between CK,C1 and C2 treatments,and C3 was significantly increased by 41.62%compared with CK treatment.It can be seen that the organic carbon storage of sandy land increases significantly when the addition amount of arsenic is 50%.