DOI: 10.1016/j.foreco.2016.08.046
Scopus记录号: 2-s2.0-84988014716
论文题名: Fertilization reduced stomatal conductance but not photosynthesis of Pinus taeda which compensated for lower water availability in regards to growth
作者: Maggard A.O. ; Will R.E. ; Wilson D.S. ; Meek C.R. ; Vogel J.G.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 381 起始页码: 37
结束页码: 47
语种: 英语
英文关键词: Fertilization
; Leaf gas exchange
; Loblolly pine
; Pinus taeda
; Throughfall reduction
Scopus关键词: Nutrients
; Photosynthesis
; Plants (botany)
; Productivity
; Soil moisture
; Fertilization
; Leaf gas exchange
; Loblolly pine
; Pinus taeda
; Throughfall
; Forestry
; concentration (composition)
; coniferous tree
; drought
; fertilizer application
; gas exchange
; growing season
; growth rate
; leaf area index
; nitrogen
; nutrient availability
; photosynthesis
; plantation
; silviculture
; soil water
; stomatal conductance
; water availability
; water content
; water uptake
; Oklahoma [United States]
; United States
; Pinus taeda
英文摘要: Loblolly pine (Pinus taeda L.) is the most commercially important tree species in the southeastern USA. Projected increases in regional temperature and drought severity likely will cause reductions in productivity, in particular for the western edge of the loblolly pine range. To determine the effects of nutrient availability and reduced water availability on leaf gas exchange, leaf area index (LAI), and tree growth, we examined the interactive effects of fertilization (one time application of 224 kg N ha−1, 28 kg P ha−1, 56 kg K ha−1 and micronutrients) and reduced throughfall (approximate 30% reduction) over growing seasons 5–7 for a loblolly pine plantation in southeastern Oklahoma. Throughfall reduction reduced volumetric soil water content from 11.3% to 8.8% and fertilization increased foliar nitrogen concentration from 1.13 to 1.27 mg g−1. Fertilization increased LAI (10%) and subsequently tree growth while reducing stomatal conductance (7%) but caused less negative (3%) midday leaf water potential. Throughfall reduction reduced stomatal conductance (12%) and net photosynthesis (9%) and these responses were related to more negative midday leaf water potentials (11%). These results indicate that fertilization increased water use efficiency in that fertilized treatments maintained similar net photosynthetic rates as nonfertilized treatments even though stomatal conductance was lower. The net effect was that fertilization increased growth of throughfall reduction treatments such that productivity was similar to ambient throughfall treatments not receiving fertilization. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64674
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Natural Resource Ecology and Management, Oklahoma State University, Stillwater, OK, United States; South Central Climate Science Center, University of Oklahoma, Norman, OK, United States; Department of Ecosystem Science and Management, Texas A&M University, College Station, TX, United States
Recommended Citation:
Maggard A.O.,Will R.E.,Wilson D.S.,et al. Fertilization reduced stomatal conductance but not photosynthesis of Pinus taeda which compensated for lower water availability in regards to growth[J]. Forest Ecology and Management,2016-01-01,381