Nature Environment and Pollution Technology

Lide Wang ¹, Tuo Yao ¹, Long Cheng ¹, Xiaohong Chai ¹, Chunxiu Guo ², Duoqing Man ², Duoze Wang ², Guangzheng Sun ¹

Affiliations
1 College of Pratacultural Science/Ministry of Education, Key Laboratory of Grassland Ecosystem/Pratacultural Engineering, Laboratory of Gansu Province/Sino-U.S. Center for Grazing Land Ecosystem Sastainability, Gansu Agricultural University, Lanzhou, 730070, CN
2 Gansu Desert Control Research Institute, Lanzhou, 730070, CN

Abstract

Soil inorganic nitrogen (nitrate nitrogen, ammonium nitrogen), enzyme activities (catalase, urease, phosphatase and invertase) and microbial biomass of secondary grassland in an abandoned farmland with different restoration years of Shiyang River are measured and analyzed. The results indicated that the soil ammonium nitrogen decreased and nitrate nitrogen increased in each layer (0-10cm, 10-20cm, 20-30cm, 30-40cm) as the restoration age increased. In addition to the 30-40cm soil layer, soil microbial biomass carbon in each layer had a downward trend in shorter abandoned ages (from 1a to 5a) and an upward trend in longer ages (from 8a to 31a); soil microbial biomass nitrogen reduced initially (from 1a to 4a), afterward increased (from 4a to 8a) and reached a steady level finally (from 8a to 31a); soil microbial biomass phosphorus increased firstly (from 1a to 5a) and then declined (from 5a to 31a). The activity of catalase altered insignificantly while those of other three soil enzymes varied significantly in the same layer within different restoration years. Soil enzyme activity declined with the increase in soil depth during the same restoration year.

Keywords

Shiyang River, Agricultural Land, Soil Chemical Properties, Soil Microbes, Soil Enzyme Activity.

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Weibing Zhang ¹, Zhongmin Zhang ², Yue Wang ², Duiyuan Ai ², Pengchen Wen ², Yan Zhu ², Lei Cao ², Tuo Yao ¹

Affiliations
1 College of Pratacultural Science/Ministry of Education, Key Laboratory of Grassland Ecosystem/Pratacultural Engineering, Laboratory of Gansu Province/Sino-U.S. Center for Grazing Land Ecosystem Sustainability, Gansu Agricultural University, Lanzhou, 730070, CN
2 College of Food Science and Technology Engineering, Gansu Agricultural University, Lanzhou 730070, CN

Abstract

Soil bacteria and fungi play key roles in ecosystem functioning and the maintenance of soil fertility. Many studies have been carried out to assess the effects of plant on microorganism communities in different environments. However, little is known about whether turfgrass establishment affects soil microbial community. Therefore, in the present study, the microbial diversity in turfgrass soil and vacant land soil were studied by high-throughput sequencing technique, and the corresponding analysis of microbial composition were conducted. The results showed that the bacteria and fungi in the soil of turfgrass are richer than that of vacant land. The difference of soil microbial community at the genera level is more significant than that at phylum level. Among bacteria, a total of one dominant genus and 91 non-dominant genera were shared by the two samples. Five dominant genera and 66 non-dominant genera were present only in sample CP4 (turfgrass soil), and 13 dominant genera and 17 non-dominant genera only in sample CP0 (vacant land). Among fungi, a total of 5 dominant genera and 71 non-dominant genera were shared by the two samples, 8 dominant genera and 23 non-dominant genera were present only in sample CP4, and 6 dominant genera and 20 non-dominant genera only in sample CP0. The results also indicated that both dominant and non-dominant microbial populations differed greatly in the two samples, as did the overall soil microbial community structure. This study provides previously unknown information regarding the impact of turfgrass establishment on soil microbial communities and also lays a foundation for further investigations into microbiota in turfgrass soil.

Keywords

Illumine Sequencing, Turfgrass Establishment, Microbial Community.

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