腾格里沙漠南缘植被恢复对土壤有机碳组成及稳定性的影响

腾格里沙漠南缘植被恢复对土壤有机碳组成及稳定性的影响

贺郝钰, 刘蔚, 常宗强, 侯春梅, 孙力炜, 迟秀丽

Effects of revegetation on soil organic carbon composition and stability in the southern edge of the Tengger Desert

Haoyu He, Wei Liu, Zongqiang Chang, Chunmei Hou, Liwei Sun, Xiuli Chi

表1 植被特征和土壤（0~10 cm）理化性质随植被恢复年限的变化

Table 1 Changes in vegetation characteristics and soil （0~10 cm） physicochemical properties during revegetation process

	植被恢复年限/a						方差分析结果
	0	12	20	32	41		F	P
植被盖度/%	4.77±0.64^a	36.21±3.05^b	35.47±2.26^b	30.48±2.11^c	30.47±2.24^c		34.697	0.001
AGB/(g·m^-2)	7.95±0.93^a	353.88±33.87^b	299.74±18.75^b	163.52±8.96^c	155.16±8.09^c		56.053	0.001
BGB/(g·m^-2)	1.11±0.14^a	9.33±0.75^b	9.20±1.18^b	9.65±0.39^b	10.12±0.41^c		31.374	0.001
凋落物/(g·m^-2)	0.00^a	7.76±0.82^b	8.74±0.77^b	11.95±0.74^c	16.22±1.66^c		39.338	0.001
黏粉粒含量/%	0.18±0.01^a	1.99±0.23^b	4.53±0.11^c	6.54±0.18^d	12.55±0.94^e		118.572	0.001
砂粒含量/%	99.82±0.01^a	98.01±0.23^b	95.47±0.11^c	93.46±0.18^d	87.45±0.93^e		118.572	0.001
pH	8.99±0.06^a	8.89±0.04^ab	8.84±0.03^b	8.58±0.17^c	8.50±0.09^c		4.984	0.018
EC/(μS·cm^-1)	25.06±0.77^a	58.97±2.89^b	90.33±2.50^c	109.7±19.42^cd	131.97±11.40^d		16.991	0.001
SOC/(g·kg^-1)	0.27±0.03^a	0.55±0.05^b	1.10±0.07^c	1.61±0.03^d	2.86±0.34^e		42.438	0.001
TN/ (g·kg^-1)	0.17±0.001^a	0.21±0.02^b	0.26±0.04^c	0.38±0.02^d	0.54±0.04^e		24.630	0.001
C∶N	1.55±0.17^a	2.77±0.48^b	4.50±0.76^c	4.26±0.33^c	5.27±0.23^d		11.054	0.001