毛乌素沙地不同类型生物结皮与下层土壤酶活性及土壤碳氮磷化学计量特征

樊瑾, 李诗瑶, 余海龙, 黄菊莹

Soil enzyme activity and carbon， nitrogen and phosphorus stoichiometric characteristics under different types of biocrusts and subsoil in Mu Us Sandland

Jin Fan, Shiyao Li, Hailong Yu, Juying Huang

表3 不同类型生物结皮及不同层次土壤酶活性和C、N、P及其化学计量特征的方差分析结果

Table 3 The ANOVA results of soil enzyme activities and C，N，P and C∶N∶P stoichiometry among different soil layer and different biocrusts

指标 结皮类型 土壤深度 结皮类型×土壤深度 F P F P F P 过氧化氢酶Cat 227.942 <0.01 2538.858 <0.01 117.118 <0.01 蔗糖酶Suc 81.692 <0.01 4499.391 <0.01 23.655 <0.01 碱性磷酸酶Alp 17.992 <0.01 569.821 <0.01 3.668 <0.05 脲酶Ure 82.408 <0.01 291.958 <0.01 22.095 <0.01 有机碳SOC 12.788 <0.01 172.720 <0.01 10.721 <0.01 全氮TN 27.893 <0.01 499.220 <0.01 12.241 <0.01 全磷TP 31.087 <0.01 91.853 <0.01 2.013 >0.05 C/N 1.017 >0.05 42.7 <0.01 2.109 >0.05 C/P 4.904 >0.05 161.733 <0.01 6.066 <0.01 N/P 1.557 >0.05 187.064 <0.01 1.968 >0.05