DOI: 10.1016/j.foreco.2013.08.019
Scopus记录号: 2-s2.0-84884372550
论文题名: Stem biomass, C and N partitioning and growth efficiency of mature pedigreed black spruce on both a wet and a dry site
作者: Major J.E. ; Johnsen K.H. ; Barsi D.C. ; Campbell M. ; Malcolm J.W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 310 起始页码: 495
结束页码: 507
语种: 英语
英文关键词: Adaptation
; Belowground mass
; Fitness
; Growth efficiency
; Soil moisture
; Wood density
Scopus关键词: Adaptation
; Belowground mass
; Fitness
; Growth efficiency
; Wood density
; Agronomy
; Biomass
; Carbon dioxide
; Drought
; Efficiency
; Forestry
; Hardwoods
; Productivity
; Soil moisture
; Ecology
; adaptation
; biomass
; biomass allocation
; carbon dioxide
; concentration (composition)
; coniferous tree
; drought stress
; dry matter
; photosynthesis
; soil carbon
; soil moisture
; soil nitrogen
; stem
; tolerance
; water availability
; Canada
; Ontario [Canada]
英文摘要: Worldwide, efforts to manage atmospheric CO2 are being explored both by reducing emissions and by sequestering more carbon (C). Stem biomass, C, and nitrogen (N) parameters were measured in plots of first-generation (F1), 32-year-old black spruce (Picea mariana (Mill.) B.S.P.) from four full-sib families studied previously for drought tolerance and differential productivity on both a dry and a wet site in central Ontario, Canada. The wet site had greater stem wood N and bark N concentrations than the dry site. Site differences in N were most likely driven by soil moisture stress impairing N uptake, as soil N was equal at both sites. Drought-tolerant (faster growing) families had lower wood density than drought-intolerant families on the wet site but there were no wood density differences between families on the dry site. Allometric analysis showed greater total stem dry mass per unit total belowground dry mass for drought-tolerant than intolerant families and for wet than dry sites, indicating a differential allocation of photosynthate dependent on both genotype and environment. Allometric analysis also showed greater total stem dry mass per unit total needle dry mass (growth efficiency) for drought-tolerant than intolerant families and for the wet than the dry site. This indicates greater productivity is a result of greater growth efficiency caused by greater net photosynthesis (shown previously) and greater partitioning of biomass to stem relative to total roots. The variation in physiological processes documented in our previous investigations and the biomass allocation variation shown here most probably underlie the increase in stem productivity from both black spruce tree improvement programs and increased water availability. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66241
Appears in Collections: 影响、适应和脆弱性
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作者单位: Natural Resources Canada, Canadian Forest Service - Atlantic Forestry Centre, Fredericton, NB E3B 5P7, Canada; USDA Forest Service, Southern Research Station, 3041 Cornwallis Road, RTP, NC 27709, United States; Natural Resources Canada, Canadian Forest Service - HQ, 580 Booth Street, Ottawa, ON K1A 0E4, Canada
Recommended Citation:
Major J.E.,Johnsen K.H.,Barsi D.C.,et al. Stem biomass, C and N partitioning and growth efficiency of mature pedigreed black spruce on both a wet and a dry site[J]. Forest Ecology and Management,2013-01-01,310