NDLI: Belowground carbon allocation and net primary and ecosystem productivities in apple trees (Malus domestica) as affected by soil water availability

Content Provider	Springer Nature Link
Author	Panzacchi, Pietro Ton, Giusti Ceccon, Christian Scandellari, Francesca Ventura, Maurizio Zibordi, Marco Tagliavini, Massimo
Copyright Year	2012
Abstract	Fruit orchards potential as carbon (C) sinks is virtually unknown. Moreover, despite their importance in the Mediterranean area, few data are available about the effect of the reduction in water availability on fruit tree productivity. Here we report the effect of two different irrigation regimes on net primary (NPP) and net ecosystem (NEP) productivities of an apple orchard in northern Italy in 2006.Trees productivity and heterotrophic soil respiration were estimated by inventory and root exclusion methods, while belowground allocation with a C mass-balance approach.The NPP of the control (7.86 ± 0.25 Mg C ha$^{-1}$; mean ± SE) was significantly greater than that of water stressed trees (6.53 ± 0.12 Mg C ha$^{-1}$), and the ratio between above and below net primary productivity (ANPP/BNPP) was 1.88 and 0.98 respectively. However, the partitioning of ANPP and BNPP among aerial organs and among fine, coarse roots, and root litter was unaffected by the water regime. Although NEP was greater in the control than in stressed trees the C gain of the system after fruit removal (NEP$_{afr}$) was unaffected by water availability.This study indicated an effect of water availability on C partitioning patterns above- and belowground, although there were no significant effects on the C sink potential as NEP$_{afr}$.
Starting Page	229
Ending Page	241
Page Count	13
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	360
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-04-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Apple Soil respiration Net primary productivity Water stress Total belowground carbon allocation Plant Sciences Plant Physiology Ecology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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