DOI: 10.1016/j.foreco.2015.01.030
Scopus记录号: 2-s2.0-84922985331
论文题名: Variability in needle lifespan and foliar biomass along a gradient of soil fertility in maritime pine plantations on acid soils rich in organic matter
作者: Eimil-Fraga C. ; Sánchez-Rodríguez F. ; Álvarez-Rodríguez E. ; Rodríguez-Soalleiro R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 343 起始页码: 34
结束页码: 41
语种: 英语
英文关键词: Biomass
; Leaf area index
; Needle longevity
; Nutrients
; Pinus pinaster
; Site index
Scopus关键词: Biogeochemistry
; Biological materials
; Biomass
; Forestry
; Nutrients
; Organic compounds
; Plants (botany)
; Productivity
; Soils
; Leaf Area Index
; Needle longevity
; Nutrient concentrations
; Pinus pinaster
; Pinus pinaster ait
; Site index
; Specific leaf area
; Standard deviation
; Needles
; acid soil
; biomass
; coniferous tree
; growth
; leaf area index
; longevity
; risk factor
; site index
; soil fertility
; soil organic matter
; survival
; tree planting
; Pinus pinaster
英文摘要: The variability in needle lifespan, foliar biomass and leaf area index was studied in 31 Pinus pinaster Ait. plots in Galicia (NW Spain), established along a gradient of soil productivity in plantations of similar age (11-14years). The soils under study were acidic (pH 3.7-5.3) and very rich in organic matter (6.9-34.3%). All needles were classified according to age class, and presence/absence of needles was recorded to evaluate survival. Specific leaf area and needle biomass were calculated for each plot. The foliage nutrient concentrations were also measured and site index was calculated. The maximum needle age was 5years. Survival of needles older than 2years declined rapidly. Needle longevity was positively affected by site index and foliar nutrient concentrations, particularly of Mg and K. This suggests that maritime pine responds to low soil fertility by decreasing needle lifespan at local scales. Needle biomass and leaf area index were significantly higher in 1 and 2-year-old needles. Total needle biomass and LAI values were very variable (average values of 4.89tha-1 and 1.64m2m-2, standard deviation 3.1 and 1.1 and CV of 64% and 69%, respectively) and were positively related to site productivity and foliar nutrients. The average litterfall rate was estimated to be 0.31year-1. The mean growth efficiency (0.36kgm-2year-1) was also rather variable (CV=50%) and was positively related to foliar K and needle longevity. The relationships between all variables associated with high levels of pine productivity and the mean shrub height were always significant and negative, indicating a reduction in the risk of ground fire. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65510
Appears in Collections: 影响、适应和脆弱性
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作者单位: Unit of Sustainable Forest Management, Department of Vegetal Production, University of Santiago de Compostela, Lugo, Spain; Subdirección General de Recursos Forestales, Xunta de Galicia, Santiago de Compostela, Spain; Department of Soil Science and Agricultural Chemistry, University of Santiago de Compostela, Lugo, Spain
Recommended Citation:
Eimil-Fraga C.,Sánchez-Rodríguez F.,Álvarez-Rodríguez E.,et al. Variability in needle lifespan and foliar biomass along a gradient of soil fertility in maritime pine plantations on acid soils rich in organic matter[J]. Forest Ecology and Management,2015-01-01,343