中国西北荒漠区藻结皮覆盖下土壤有机碳垂直分布特征及其影响因素

杜蕃, 杨军刚, 郭星, 陆永兴, 陶冶, 尹本丰, 荣晓莹, 李永刚, 张元明, 周晓兵

Vertical distribution characteristics and influencing factors of soil organic carbon under cyanobacterial crusts in the Northwest desert region of China

Fan Du, Jungang Yang, Xing Guo, Yongxing Lu, Ye Tao, Benfeng Yin, Xiaoying Rong, Yonggang Li, Yuanming Zhang, Xiaobing Zhou

表2 西北荒漠区裸沙和藻结皮覆盖下土壤理化性质

Table 2 Soil physicochemical characteristics under bare sand and cyanobacterial crust coverage in the northwest desert region

类型	土层 /cm	酸碱度 pH	电导率 EC /（μS·cm^-1）	全氮 TN /(mg·kg^-1)	硝态氮 NO $_{3}^{-}$ -N /(mg·kg^-1)	铵态氮 NH $_{4}^{+}$ -N /(mg·kg^-1)	全磷 TP /(mg·kg^-1)	速效磷 AP /(mg·kg^-1)	土壤含水率SWC /%
裸沙	0~2	8.15±0.09^a	105.91±14.38^a	98.59±19.56^a	12.21±6.93^a	8.78±1.31^a	259.89±53.25^a	3.14±0.45^a	0.12±0.04^b
	2~5	8.22±0.10^a	120.67±34.85^a	94.66±17.73^a	9.82±4.51^a	7.38±1.28^a	243.56±46.20^a	3.20±0.36^a	0.20±0.07^b
	5~10	8.27±0.09^a	90.91±8.53^a	95.14±18.01^a	11.28±7.06^a	6.80±1.21^a	237.19±46.82^a	2.84±0.26^a	0.31±0.09^b
	10~20	8.32±0.09^a	113.14±28.72^a	79.85±11.63^a	11.34±7.60^a	7.53±1.11^a	233.01±42.80^a	2.72±0.25^a	0.84±0.28^a
藻结皮	BSC	7.72±0.09^c	194.91±37.15^a	202.71±30.34^a	10.90±2.79^a	11.43±1.50^a	365.15±43.00^a	3.37±0.40^a	0.18±0.03^a
	0~2	8.14±0.08^b	161.83±50.30^a	147.62±23.26^a	12.11±4.41^a	6.56±1.41^b	282.09±39.65^a	3.18±0.36^a	0.19±0.02^a
	2~5	8.31±0.07^ab	165.78±65.19^a	134.15±23.42^a	12.66±5.73^a	6.15±1.25^b	269.44±41.53^a	3.20±0.33^a	0.34±0.11^a
	5~10	8.44±0.06^a	148.29±54.10^a	125.24±23.03^a	7.84±2.95^a	5.87±1.05^b	245.19±35.44^a	3.13±0.25^a	0.28±0.04^a
	10~20	8.51±0.06^a	136.24±36.39^a	124.15±24.78^a	6.87±2.35^a	6.98±1.25^b	263.09±45.28^a	2.88±0.27^a	0.35±0.08^a