科尔沁沙地封育恢复过程中植物群落特征变化及影响因素

王明明,刘新平,何玉惠,张铜会,魏静,车力木格,孙姗姗

How enclosure influences restored plant community changes of different initial types in Horqin Sandy Land

WANG Ming-Ming,LIU Xin-Ping,HE Yu-Hui,ZHANG Tong-Hui,WEI Jing,Chelmge ,SUN Shan-Shan

表3 科尔沁沙地不同类型封育沙地2008和2017年土壤养分、水分、有机质含量以及种子密度和丰富度比较(平均值±标准偏差)

Table 3 Multiple comparisons of soil nutrients, soil moisture, soil organic matter and soil seed density, seed richness in different enclosure types of sandy lands in the Horqin Sandy Land in 2008 and 2017 (mean ± SD)

土壤因子 Soil factor	MD		FD		SG
土壤因子 Soil factor	2008年	2017年	2008年	2017年	2008年	2017年
SOM (g·kg^-1)	0.53 ± 0.08^a	0.42 ± 0.05^b	1.13 ± 0.39^a	1.05 ± 0.36^a	5.64 ± 2.18^a	4.05 ± 0.51^a
TN (g·kg^-1)	0.03 ± 0.05^a	0.024 ± 0.01^a	0.068 ± 0.02^a	0.072 ± 0.06^a	0.34 ± 0.11^a	0.35 ± 0.07^a
AN (mg·kg^-1)	5.35 ± 1.25^b	8.80 ± 2.52^a	6.35 ± 3.20^b	11.28 + 3.60^a	22.51 ± 2.98^b	29.87 ± 4.89^a
AP (mg·kg^-1)	4.14 ± 0.65^b	9.88 ± 0.17^a	3.88 ± 0.92^b	9.87 ± 0.07^a	3.22 ± 1.32^b	9.43 ± 0.11^a
AK (mg·kg^-1)	54.67 ± 7.08^a	43.05 ± 4.60^b	64.58 ± 9.80^a	65.61 ± 11.30^a	116.42 ± 23.30^a	112.47 ± 20.20^a
SSD (粒·m^-2)	492.0 ± 204.40^a	670.0 ± 268.6^a	2 669 ± 1 108^a	1 860 ± 687^a	3 344 ± 1 378^a	4 072 ± 1 639^a
SSR	4.0 ± 1.20^b	5 ± 1.30^a	10 ± 0.50^a	8 ± 1.33^b	12 ± 2.10^a	9 ± 1.24^b
SM (%)	2.43 ± 0.32^b		2.00 ± 0.07^c		3.72 ± 0.10^a