DOI: 10.1016/j.foreco.2013.02.006
Scopus记录号: 2-s2.0-84875243246
论文题名: Variations in N mineralization and herbaceous species diversity due to sites, seasons, and N treatments in a seasonally dry tropical environment of India
作者: Verma P. ; Verma P. ; Sagar R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 297 起始页码: 15
结束页码: 26
语种: 英语
英文关键词: Dry tropical environment
; N application
; N mineralization
; NMS ordination
; Species composition
; Species diversity
Scopus关键词: Banaras Hindu University
; Essential elements
; Herbaceous vegetation
; Microbial dynamics
; N mineralization
; NMS ordination
; Species composition
; Tropical environments
; Biodiversity
; Rain
; Soils
; Tropics
; Vegetation
; Mineralogy
; atmospheric deposition
; community composition
; herb
; mineralization
; moisture content
; nutrient availability
; rainfall
; sampling
; seasonal variation
; species diversity
; tropical environment
; university sector
; India
英文摘要: Nitrogen (N) is an essential element for plant growth, however enriched N deposition may have seriously impacts on air, water, soil and vegetations. In this reference, we assessed the impacts of N applications on the rates of N-mineralization and their counter effects on the composition and diversity of herbaceous vegetation in a seasonally dry tropical environment of India. For this; 135, 1×1m plots distributed in 15 locations were established at the Banaras Hindu University, India. Since 1st January 2007, within each location, equal numbers of 1×1m plots were treated with three doses of N (0kgNha-1yr-1/control, 60kgNha-1yr-1 and 120kgNha-1yr-1). Soil and vegetation samples were collected in year 2010. The data on soil N mineralization, rainfall and species numbers were collected monthly and the data on Shannon diversity index were collected seasonally. The data were subjected to appropriate statistical analyses. The NMS ordination suggested that the sites, N levels and seasons caused substantial differences in the rate of soil N-mineralization, species composition and diversity of herbaceous species. Results showed that moderate levels of rainfall and N applications (60kgNha-1yr-1) facilitated the accumulation of herbaceous species diversity by accelerating the process of soil N-mineralization due to increased availability of soil-N and decreased C:N ratio of the soil. The study did not support the N-saturation theory for the N-mineralization rates as well as species diversity possibly due to loss of added N through the process of volatization, denitrification and consumed by the nitrophilic species, which warrants in-depth study of microbial dynamics to explore the mechanisms associated with N mineralization in N perturbed ecosystems, particularly from dry tropical environments of India which are nutrient and moisture limited. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66637
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Botany, Banaras Hindu University, India
Recommended Citation:
Verma P.,Verma P.,Sagar R.. Variations in N mineralization and herbaceous species diversity due to sites, seasons, and N treatments in a seasonally dry tropical environment of India[J]. Forest Ecology and Management,2013-01-01,297