毛乌素沙地火电厂周边不同类型生物结皮酶活性及其影响因素

王融融, 樊瑾, 丛士翔, 余海龙, 黄菊莹

Enzyme activity characteristics and their influencing factors of different biocrusts around thermal plant in Mu Us Sandy Land

Rongrong Wang, Jin Fan, Shixiang Cong, Hailong Yu, Juying Huang

表4 不同类型生物结皮土壤重金属含量特征

Table 4 Characteristics of heavy metal contents of different biocrusts

样品	土层	Hg/(mg·kg^-1)	Pb/(mg·kg^-1)	As/(mg·kg^-1)	Cd/(mg·kg^-1)	Cr/(mg·kg^-1)	Zn/(mg·kg^-1)
藻结皮	结皮层	0.076±0.01^ab	16.200±0.32^ab	13.190±0.31^ab	0.281±0.02^a	52.732±1.96^a	39.507±0.97^a
	0~5 cm	0.072±0.01^a	13.332±0.68^a	12.802±0.41^a	0.131±0.02^a	52.566±2.07^a	32.086±0.71^a
	5~10 cm	0.071±0.00^a	12.681±0.05^a	11.926±0.30^a	0.105±0.00^a	48.902±0.16^a	31.047±0.71^a
	10~20 cm	0.070±0.00^a	12.713±0.33^a	11.543±0.28^a	0.103±0.00^a	50.147±2.35^a	31.040±0.60^a
混生结皮	结皮层	0.079±0.01^ab	18.776±0.12^b	15.952±1.53^a	0.327±0.01^a	56.935±2.70^a	41.262±0.22^ab
	0~5 cm	0.078±0.01^ab	13.244±0.33^a	14.498±1.38^a	0.126±0.00^a	53.631±2.00^a	31.765±0.84^a
	5~10 cm	0.070±0.00^a	12.701±0.24^a	12.766±0.34^ab	0.101±0.00^a	53.162±0.88^a	31.707±0.70^a
	10~20 cm	0.074±0.00^ab	12.402±0.53^a	12.133±0.36^a	0.099±0.00^a	52.302±2.03^a	30.861±0.71^a
藓结皮	结皮层	0.095±0.01^a	19.638±1.37^b	16.627±3.11^a	0.409±0.08^a	57.063±3.01^a	44.412±2.16^b
	0~5 cm	0.092±0.01^b	13.177±0.18^a	14.782±3.57^a	0.136±0.01^a	52.936±0.97^a	32.313±0.42^a
	5~10 cm	0.080±0.04^a	11.663±0.52^b	14.063±0.51^b	0.105±0.00^a	49.778±1.53^a	30.041±0.48^b
	10~20 cm	0.079±0.00^b	11.816±0.90^a	11.470±0.11^a	0.102±0.00^a	48.540±3.80^a	32.144±1.68^a
风沙土背景值^[31]/(mg·kg^-1)		0.016	13.8	4.3	0.044	24.8	29.8
宁夏土壤环境背景值^[31]/(mg·kg^-1)		0.021	20.6	11.9	0.112	60.0	58.8