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@ARTICLE{Postma:888606,
author = {Postma, Johannes A. and Hecht, Vera L. and Hikosaka, Kouki
and Nord, Eric A. and Pons, Thijs L. and Poorter, Hendrik},
title = {{D}ividing the pie: {A} quantitative review on plant
density responses},
journal = {Plant, cell $\&$ environment},
volume = {44},
number = {4},
issn = {1365-3040},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2020-05062},
pages = {1072-1094},
year = {2021},
abstract = {Plant population density is an important variable in
agronomy and forestry and offers an experimental way to
better understand plant-plant competition. We made a
meta-analysis of responses of even-aged mono-specific stands
to population density, by quantifying for 3 stand and 33
individual plant variables in 334 experiments how much both
plant biomass and phenotypic traits change with a doubling
in density. Increasing density increases standing crop per
area, but decreases the mean size of its individuals, mostly
through reduced tillering and branching. Among the
phenotypic traits, stem diameter is negatively affected, but
plant height remains remarkably similar, partly due to an
increased stem length:mass ratio, partly by increased
allocation to stems. The reduction in biomass is caused by a
lower photosynthetic rate, mainly due to shading of part of
the foliage. Total seed mass per plant is also strongly
reduced, marginally by lower mass per seed, but mainly
because of lower seed numbers. Plants generally have fewer
shoot-born roots, but their overall rooting depth seems
little affected. The phenotypic plasticity responses to high
densities correlate strongly with those to low-light, and
less with those to low nutrients, suggesting that at high
density, shading affects plants more than nutrient
depletion.Keywords: plant population density, plant
population dynamics, intra-specific competition, nutrient
availability, shading, meta-analysis},
cin = {IBG-2},
ddc = {580},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
pubmed = {33280135},
UT = {WOS:000603321100001},
doi = {10.1111/pce.13968},
url = {https://juser.fz-juelich.de/record/888606},
}