中文摘要：

土壤酶活动在变换起一个重要作用玷污器官的碳进无机的碳，它为全球碳周期是重要的。在这研究，我们调查了二 ligninolytic 酶(peroxidase 和多酚 oxidase ) 和五 non-ligninolytic 酶的土壤酶活动(-1,4-glucosidase (AG ) ；-1,4-glucosidase (BG ) ；N 乙酰 -- glucosaminidase (唠叨) ；-D-cellobiosidase (CBH ) ；并且 -xylosidase (BXYL )) 在在 Fukang 的 Sangong 河盆的四个植物社区，北方 Xinjiang，中国。分别地，四个典型植物社区被 Haloxylon ammodendron， Reaumuria soongonica， Salsola passerina，和 Tamarix rarmosissima 与改变的碱度的盐的土壤统治。结果证明土壤 peroxidase 活动季节地减少了。五 non-ligninolytic 酶的活动与增加土壤深度减少了，当那些没二 ligninolytic 酶显示出如此的一个趋势时。在四个植物社区， BG 在五 non-ligninolytic 酶之中举办了最高的活动，并且二 ligninolytic 酶的活动比四 non-ligninolytic 的那些高(AG，唠叨， CBH，和 BXYL ) 。H 的社区。ammodendron 在大多数情况中关于二 ligninolytic 酶显示了最高的活动，但是没有重要差别在四个植物社区之中被发现。四个植物社区的土壤酶活动的几何平均数通过独立地执行的主要部件分析(PCA ) 被验证，它显示不同植物社区举办了不同土壤酶活动。关联分析证明那项土壤多酚 oxidase 活动断然显著地与五 non-ligninolytic 酶的活动被相关。除了 peroxidase，土壤 pH 价值断然与所有土壤酶的活动被相关。玷污也显示出的微生物引起的碳内容重要积极关联(P < 0.01 ) 与除了多酚 oxidase 的所有土壤酶的活动。结果建议了 H。ammodendron 社区有最高的能力利用土壤器官的碳，和配糖物能是在在 Xinjiang 的干旱区域的盐的土壤的最广泛地利用的 non-ligninolytic 碳来源。

英文摘要：

Soil enzyme activity plays an important role in the conversion of soil organic carbon into inorganic carbon, which is significant for the global carbon cycle. In this study, we investigated the soil enzyme activities of two ligninolytic enzymes （peroxidase and polyphenol oxidase） and five non-ligninolytic enzymes （a-l,4-glucosidase （AG）; 13-1,4-gluco- sidase （BG）; N-acetyl-[3-glucosaminidase （NAG）; ~3-D-cellobiosidase （CBH）; and ~-xylosidase （BXYL）） in four plant communities of the Sangong River basin in Fukang, North Xinjiang, China. The four typical plant communities were dominated by Haloxylon ammodendron, Reaumuria soongonica, Salsola passerina, and Tamarix rarmosissima, respec- tively, with saline soils of varied alkalinity. The results showed that the soil peroxidase activity decreased seasonally. The activities of the five non-ligninolytic enzymes decreased with increasing soil depths, while those of the two ligninolytic enzymes did not show such a trend. In the four plant communities, BG had the highest activity among the five non-ligninolytic enzymes, and the activities of the two ligninolytic enzymes were higher than those of the four non-ligninolytic ones （AG, NAG, CBH, and BXYL）. The community of H. ammodendron displayed the highest activity with respect to the two ligninolytic enzymes in most cases, but no significant differences were found among the four plant communities. The geometric mean of soil enzyme activities of the four plant communities was validated through an inde- pendently performed principal component analysis （PCA）, which indicated that different plant communities had different soil enzyme activities. The correlation analysis showed that soil polyphenol oxidase activity was significantly positively correlated with the activities of the five non-ligninolytic enzymes. The soil pH value was positively correlated with the ac- tivities of all soil enzymes except peroxidase. Soil microbial carbon content also showed a significant positive correlation （