DOI: 10.1007/s10533-013-9942-1
Scopus记录号: 2-s2.0-84907547762
论文题名: Nitrogen budgets of urban lawns under three different management regimes in southern California
作者: Wang W. ; Haver D. ; Pataki D.E.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 121, 期: 1 起始页码: 127
结束页码: 148
语种: 英语
英文关键词: Lawns
; N cycling
; Turfgrass
; Urban biogeochemistry
Scopus关键词: clipping
; environmental impact
; grass
; nitrogen cycle
; nutrient uptake
; residential location
; sedge
; urban area
; California
; United States
; Poaceae
英文摘要: We constructed nitrogen (N) budgets for the lawns of three simulated residences built to test the environmental impacts of three different residential landscape designs in southern California. The three designs included: a “Typical” lawn planted with cool season tall fescue (Schedonorus phoenix), fertilized at the recommended rate for this species (192 kg−1 ha−1 year−1) and irrigated with an automatic timer; a design intended to lower N and water requirements (“Low Input”) with the warm season seashore paspalum (Paspalum vaginatum) fertilized at 123 kg−1 ha−1 year−1 and irrigated with a soil moisture-based system; and a design incorporating local best practices (“Low Impact” lawn) that included the native sedge species Carex, fertilized at 48 kg−1 ha−1 year−1 and irrigated by a weather station-based system. Plant N uptake accounted for 33.2 ± 0.5 (tall fescue), 53.7 ± 0.7 (seashore paspalum), and 12.2 ± 1.3 % (Carex) of annual N inputs, while estimated N retention in soil was relatively large and similar in the three lawns (41–46 %). At lower N and water inputs than Typical, Low Input showed the highest annual clipping yield and N uptake, although it also had higher denitrification rates. Leaching inorganic N losses remained low even from the Typical lawn (2 %), while gaseous N losses were highly variable. The Low Input lawn was most efficient in retaining N with relatively low water and N costs, although its fertilization rates could be further reduced to lower gaseous N losses. Our results suggest that the choice of a warm-season, C4 turf species with reduced rates of irrigation and fertilization is effective in this semi-arid region to maintain high productivity and N retention in plants and soils at low N and water inputs. © 2013, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83586
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Ecology & Evolutionary Biology, University of California, Irvine, CA, United States; University of California Cooperative Extension, 1045 Arlington Drive, Costa Mesa, CA, United States; Department of Biology, University of Utah, Salt Lake City, UT, United States
Recommended Citation:
Wang W.,Haver D.,Pataki D.E.. Nitrogen budgets of urban lawns under three different management regimes in southern California[J]. Biogeochemistry,2014-01-01,121(1)