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| 1 | Saline soil enzyme activities of four plant communities in Sangong River basin of Xinjiang,China显示文摘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(α-1,4-glucosidase(AG);β-1,4-glucosidase(BG);N-acetyl-β-glucosaminidase(NAG);β-D-cellobiosidase(CBH);andβ-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,respectively,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 independently 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 activities of all soil enzymes except peroxidase.Soil microbial carbon content also showed a significant positive correlation(P<0.01)with the activities of all soil enzymes except polyphenol oxidase.The results suggested that the H.ammodendron community has the highest ability to utilize soil organic carbon,and glucoside could be the most extensively utilized non-ligninolytic carbon source in the saline soil of arid areas in Xinjiang. | ZhengJun GUAN Qian LUO Xi CHEN XianWei FENG ZhiXi TANG Wei WEI YuanRun ZHENG | 2014 | Journal of Arid Land2014，6，2： | 11 |
| 2 | Distribution of plant species and species-soil relationship in the east central Gurbantunggut Desert, China显示文摘在在东方的种类和土壤因素之间的植物种类和关系的分发 Gurbantunggut 沙漠的中央部分被学习提供更多的卓见进植物群并且越过沙漠的各种各样的部分在植被决定差别。双向簇分析证明在区域的植被能被划分成三个组,第一个组被灌木种类, Ephedra przewalskii 和草种类统治,主要在扁平的根据和轻轻的斜坡的区域的 Carex physodes;第二个组被 C 统治。physodes, Artemisia songorica 和 A。主要沙沙丘和第三个组的斜坡上的 xerophytica 被灌木种类统治,主要沙沙丘的顶上的 Haloxylon persicum。在植物密度在之间没有差别组织 1 和 2,但是在组 3 有重要减少。不到植被组 3 的土壤水比在其它,二个组根本玷污深度的低得多。EC,有机物,全部的 P 和可溶的 Na, Ca 和 Mg 与土壤水很同样变化了。正规通讯分析(CCA ) 令人满意地在区域估计了种类土壤关系。植物种类的分发强烈与水内容,有机物, EC 和营养素的土壤因素被相关。在三把 CCA 斧子解释的种类出现的变化是大约 70% ,显示一些解释地点变量可以在我们的学习参数外面存在。土壤质地被建议在未来研究被包括改进 CCA 的解释。 | AN Ping LI Xiangjun ZHENG Yuanrun ENEJI A. Egrinya QIMAN Yunus ZHENG Mingqing INANAGA Shinobu | 2015 | Journal of Geographical Sciences2015，25，1： | 11 |
| 3 | Effect of drought on pigments, osmotic adjustment and antioxidant enzymes in six woody plant species in karst habitats of southwestern China显示文摘 | Changcheng Liu Yuguo Liu Ke Guo Dayong Fan Guoqing Li Yuanrun Zheng Lifei Yu Rui Yang | 2010 | Environmental and Experimental Botany2010，，2： | 2 |
| 4 | Germination characteristics of Agriophyllum squarrosum 显示文摘 | Yuanrun Zheng Yong Gao | 2004 | Canadian Journal of Botany2004，82，11： | 1 |
| 5 | Ecological restoration in northern china:germination characteristics of nine key species in relation to air seeding显示文摘 | Zheng Yuanrun Xie Zhixiao Gao Yong | 2003 | Belgian Journal of Botany2003，136，2： | 1 |
| 6 | Responses to air temperature and soil moisture of growth of four dominant species on sand dunes of central Inner Mongolia显示文摘 | Yuanrun Zheng Glyn M. Rimmington Zhixiao Xie Lei Zhang Ping An Guangsheng Zhou Xiangjun Li Yunjiang Yu Lijun Chen Hideyuki Shimizu | 2008 | Journal of Plant Research2008，，5： | 1 |
| 7 | Persistence of four dominant psammophyte species in central Inner Mongolia of China under continual drought显示文摘Clarifying the persistence time of seedlings of dominant species under continual drought will help us understand responses of ecosystems to global climate change and improve revegetation efforts.Drought tolerance of four dominant psammophytic shrub species occurring in different environments was studied in the semi-arid areas of Inner Mongolian grasslands.Seedlings of Hedysarum laeve,Caragana korshinskii,Artemisia sphaerocephala and Artemisia ordosica were grown under four air temperature regimes(night/day:12.5/22.5℃,15/25℃,17.5/27.5℃ and 20/30℃)within climate(air temperature and humidity)controlled,naturally lit glasshouses with a night/day relative humidity of 70%/50%.Pots were watered to field capacity for each temperature treatment.Soil water condition was monitored by weighting each pot every day using an electronic balance.Date of seedling death for each treatment was recorded and the dead plants were harvested.Plant dry weights were determined after oven drying at 80℃ for 3 days.Two Artemisia species had higher growth rates than H.laeve and C.korshinskii,and the growth of all four species increased with increasing temperatures.The two Artemisia species had the highest leaf biomass increment,followed by C.korshinskii,and then H.laeve.Shoot biomass increment was higher for A.ordosica and C.korshinskii,intermediate for A.sphaerocephala and lowest for H.laeve.C.korshinskii had the highest root biomass increment.The final soil water content at death for all four species varied from 1% to 2%.C.korshinskii,A.sphaerocephala,H.laeve and A.ordosica survived for 25-43,24-41,26-41,and 24-37 days without watering,respectively.C.korshinskii,A.sphaerocephala,H.Laeve,and A.ordosica seedlings survived longer at the lowest temperatures(12.5/22.5℃)than at the highest temperatures(20/30℃)by 18,17,15 and 13 days,respectively.Increased climatic temperatures induce the death of seedlings in years with long intervals between rainfall events.The adaptation of seedlings to droughts should be emphasized in revegetation efforts in the Ordos Plateau,Inner Mongolia. | YuanRun ZHENG LianHe JIANG Yong GAO Xi CHEN GePing LUO XianWei FENG YunJiang YU Ping AN Yi YU Hideyuki SHIMIZU | 2013 | Journal of Arid Land2013，5，3： | 1 |
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