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2 生物结皮结皮层及其下层土壤理化性质

Table 2 Physicochemical properties of biocrusts and subsoil

层次 /cm	结皮类型	容重BD /(g·cm^-3)	含水率 SWC/%	孔隙度 Por/%	pH值	碱解氮AN /(mg·kg^-1)	速效磷AP /(mg·kg^-1)	速效钾AK /(mg·kg^-1)
结皮层	藻结皮	1.12±0.03^Aa	5.20±0.48^Aa	54.79±1.07^Aa	8.07±0.01^Aa	668.74±51.75^Aa	14.74±1.89^Aa	117.76±2.76^Aa
	混生结皮	1.11±0.09^Aa	4.20±0.66^Aa	58.16±3.32^Aa	8.21±0.15^Aa	809.89±50.90^Aa	15.29±2.97^Aa	137.18±3.14^Aa
	藓结皮	1.04±0.07^Aa	4.47±0.27^Aa	60.82±2.70^Aa	7.84±0.07^Ab	1096.98±63.74^Ab	26.14±2.61^Ab	202.32±18.5^Ab
0—5	藻结皮	1.31±0.01^Bab	7.54±0.75^Aa	50.62±0.36^Ba	8.47±0.02^Ba	196.08±4.53^Ba	6.52±0.61^Ba	94.82±3.26^Ba
	混生结皮	1.37±0.03^Ba	5.31±0.27^Ab	48.36±1.27^Ba	8.51±0.02^Bab	272.52±5.41^Bb	7.83±0.96^Ba	110.16±2.33^Ba
	藓结皮	1.23±0.05^Bb	5.52±0.27^Ab	53.71±2.03^Bb	8.60±0.04^Bb	316.11±20.02^Bc	10.41±0.69^Bb	135.02±8.72^Bb
5—10	藻结皮	1.39±0.05^Ba	7.14±0.91^Aa	47.44±1.95^Ba	8.50±0.02^Ba	117.80±15.31^Ba	5.09±1.00^BCa	70.15±5.72^Ca
	混生结皮	1.32±0.04^Ba	3.97±0.29^Bb	50.16±1.57^Ba	8.43±0.09^Ba	215.34±4.01^Cb	5.72±0.43^BCa	80.26±7.35^Ca
	藓结皮	1.31±0.04^BCa	4.28±0.29^Bb	50.44±1.42^BCa	8.80±0.07^Bb	245.38±23.25^Bb	6.65±0.26^BCa	124.34±3.57^Bb
10—20	藻结皮	1.39±0.02^Ba	6.52±1.31^Aa	47.55±0.70^Ba	8.47±0.05^Ba	110.13±15.02^Ba	2.75±0.24^Ca	47.58±9.08^Da
	混生结皮	1.43±0.04^Ba	4.71±0.36A^Ba	46.09±1.40^Ba	8.51±0.13^Ba	212.8±25.20^Cb	2.03±0.09^Ca	52.00±4.42^Da
	藓结皮	1.39±0.01^Ca	4.34±0.23^Ba	47.45±0.31^Ca	8.89±0.10^Cb	178.27±5.20^Cb	2.55±0.38^Ca	75.74±2.12^Cb