冻融过程对荒漠区不同微生境下齿肋赤藓渗透调节物含量和抗氧化酶活力的影响

尹本丰, 张元明

Impacts of freeze-thaw processes on antioxidant activities and osmolyte contents of Syntrichia caninervis under different desert microhabitats

YIN Ben-Feng,ZHANG Yuan-Ming

表1 不同微生境下土壤理化性质的比较(平均值±标准偏差)

Table 1 Comparison of soil physical and chemical properties among different microhabitats (mean ± SD)

项目 Item	活灌丛 Alive shrub	死灌丛 Dead shrub	裸露地 Exposed area
有机碳 Organic matter (g·kg^-1)	3.721 ± 0.318^a	3.898 ± 0.737^a	2.300 ± 0.574^b
全氮 Total nitrogen (g·kg^-1)	0.475 ± 0.073^a	0.495 ± 0.048^a	0.301 ± 0.047^b
全磷 Total phosphorus (g·kg^-1)	0.400 ± 0.014^ab	0.445 ± 0.013^a	0.394 ± 0.059^b
全钾 Total potassium (g·kg^-1)	13.119 ± 0.249^a	12.977 ± 0.127^a	12.194 ± 0.136^b
总盐 Total salt (g·kg^-1)	0.576 ± 0.018^a	0.567 ± 0.079^a	0.514 ± 0.045^a
pH值 pH value	7.936 ± 0.031^a	7.672 ± 0.036^b	7.652 ± 0.262^b
电导率 Electrical conductivity (μs·cm^-1)	0.131 ± 0.009^a	0.129 ± 0.008^a	0.125 ± 0.016^a
冻结期温度(日均温) Temperature in freezing periods (℃)	-9.36	-11.09	-11.67
融雪期温度(日均温) Temperature in snow melting periods (℃)	-2.18	2.81	2.82
春季中旬干旱无雨期温度(日均温) Temperature in dry environment (℃)	9.76	11.64	11.64