Skip to Main Content
Short-term effects of fertilization on loblolly pine (Pinus taeda L.) physiologyAuthor(s): C.M. Gough; J.R. Seiler; Chris A. Maier
Source: Plant, Cell and Environment (2004) 27, 876 886
Publication Series: Miscellaneous Publication
PDF: View PDF (319 KB)
DescriptionFertilization commonly increases biomass production in loblolly pine (Pinus taeda L.). However, the sequence of short-term physiological adjustments allowing for the establishment of leaf area and enhanced growth is not well understood. The effects of fertilization on photosynthetic parameters, root respiration, and growth for over 200 d following the application of diammonium phosphate were intensively investigated in an effort to establish a relative sequence of events associated with improved growth. Root respiration, foliar nitrogen concentration [N]f, and light-saturated net photosynthesis (Asat) temporarily increased following fertilization. Asat was correlated positively with [N]f when non-fertilized and fertilized treatments were pooled (R2 = 0.47). Increased photosynthetic capacity following fertilization was due to both improved photochemical efficiency and capacity and enhanced carboxylation capacity of Rubisco. Positive effects of fertilization on growth were observed shortly after Asat increased. Fertilized seedlings had 36.5% more leaf area and 36.5% greater total dry weight biomass at 211 d following fertilization. It is concluded that fertilization temporarily increased photo-synthetic capacity, which resulted in a pool of photo-assimilate used to build leaf area. The N from fertilizer initially invested in photosynthetic structures and enzymes probably re-translocated to newly developing foliage, explaining the reduction in [N]f and Asat that was observed after peak levels were achieved following fertilization.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGough, C.M.; Seiler, J.R.; Maier, Chris A. 2004. Short-term effects of fertilization on loblolly pine (Pinus taeda L.) physiology. Plant, Cell and Environment (2004) 27, 876 886
- Post-fertilization physiology and growth performance of loblolly pine clones
- Branch growth and gas exchange in 13-year-old loblolly pine (Pinus taeda) trees in response to elevated carbon dioxide concentration and fertilization
- Pinus taeda clones and soil nutrient availability: effects of soil organic matter incorporation and fertilization on biomass partitioning and leaf physiology
XML: View XML