草业学报2018，Vol.27Issue(9)：14-24,11.DOI:10.11686/cyxb2017440
石羊河下游不同类型荒漠草地黑果枸杞群落结构特征及土壤特性研究
Structural features of Lycium ruthenicum communities and associated soil characteristics on different types of desert rangeland in the lower reaches of the Shiyang River
摘要
Abstract
The species composition and soil characteristics of black wolfberry communities in four different types of desert rangeland (loose sand dunes, salt flats, gravels, vegetated or semi-vegetated dunes) in the lower reaches of the Shiyang river were studied. Key content of this paper includes: 1) Among the plant communities investigated, there were 31 species (12 shrub plants, 8 perennial herbs and 11 annual herbs) belonging to 9 families and 28 genera. Hence the community structure at each studied site typically comprised a few families represented by a single taxon from one or more genera. Lycium ruthenicum had a dominance role in each of the 4 communities with ‘importance values’ of 58. 9%, 17. 6% , 18. 2% and 38. 1% , respectively, for the above 4 site categories. Only at the gravel flats site was another species more important (Setaria viridis, 28. 9%). 2) A range of soil chemical properties are tabulated for 0-10 cm. 10-20 cm. 20-40 cm, and 40- 60 cm soil depths. Soil organic C for the 0-10 cm soil depth was 0. 30%, 1. 08%, 0. 29%, and 0. 37% (mean s. e. ±0. 05%) , respectively, for loose dune, salt flat, gravel and vegetated dune sites. The measured soil properties generally did not vary significantly with soil depth, but along with SOC, soil total P and available K were markedly higher in saline flats than at the other site categories.3) Site rankings for soil microbial biomass were saline soil (-300mg.kg-l>loose>sand>vegetated dunes>gravel ( -125 mg . kg-'). Soil enzyme activities are reported for the 4 soil depths for catalase, sucrose, urease, phosphatase and invertase, and were highest in the saline soil in each case. 4) There was a significant positive correlation between soil organic matter and microbial biomass carbon, microbial biomass nitrogen, phosphatase and sucrase (P<O. 01), and a significant positive correlation with urease and catalase (P<0. 05). Phosphorus content was significantly positively correlated with urease,phosphatase and invertase (P<O. 01) , and positively correlated with microbial biomass carbon (P<0. 05). Soil available potassium content was significantly positively correlated with microbial biomass nitrogen and phosphatase ( P<0. 01).关键词
石羊河下游/荒漠草地/黑果枸杞群落/植被特征/土壤特性Key words
the lower reaches of Shiyang River/ desert rangeland/ Lycium. ruthenicum. community/ vegetation structural features/ soil characteristics引用本文复制引用
郭春秀1,2,3,马俊梅1,2,3*,何芳兰2,3,王理德2,3,李金辉1,2,3,安富博2,3,袁宏波2,3,刘开琳2,3..石羊河下游不同类型荒漠草地黑果枸杞群落结构特征及土壤特性研究[J].草业学报,2018,27(9):14-24,11.基金项目
国家地区基金项目(31560128,31760709,31860175,31460134,31460223),重点实验室开放基金项目(GSDC201506)和省自然科学基金项目(18JR3RA018)资助. （31560128,31760709,31860175,31460134,31460223）
