A Survey to Determine the Leaf Nitrogen Concentrations of 25 Landscape Tree Species

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Figure 1.
Ranges and medians of total nitrogen (percent total N on dry weight basis) in leaves of 25 landscape tree species.

Table 1.

Range of total nitrogen (percent total N on dry weight basis) in leaves of 25 landscape tree species.

Tree species	Range (%)^*
White mulberry (Moms alba)	2.0-3.6
White birch (Betula pendula)	2.2-3.4
Goldenrain tree (Koelreuteria paniculata)	1.9-3.5
Silver maple (Acer saccharinum)	2.0-3.4
Honeylocust (Gleditsia triacanthos)	2.3-3.1
Raywood ash (Fraxinus oxycarpa)	2.1-2.9
Valley oak (Quercus lobata)	2.1-2.9
Crapemyrtle (Lagerstroemia indica)	1.1-3.5
Modesto ash (Fraxinus velutina ‘Modesto’)	1.8-2.7
Zelkova (Zelkova serrata)	1.8-2.8
Chinese pistache (Pistachia chinensis)	1.6-3.0
White alder (Alnus rhombifolia)	1.9-2.6
Southern magnolia (Magnolia grandiflora)	1.0-3.5
Chinese tallow tree (Sapium sebiferum)	1.7-2.7
Chinese hackberry (Celtis sinensis)	1.4-2.8
Eucalyptus (Eucalyptus spp.)	1.8-2.1
London planetree (Platanus acerifolia)	1.4-2.6
Holly oak (Quercus ilex)	1.3-2.8
Tuliptree (Liriodendron tulipifera)	1.2-2.8
Cork oak (Quercus suber)	1.5-2.2
Maidenhair tree (Ginkgo biloba)	1.4-2.4
Olive (Olea europa)	1.3-1.9
Camphor tree (Cinnamomum camphora)	1.2-2.0
Bradford pear (Pyrus calleryana ‘Bradford’)	1.1-1.9
Deodar cedar (Cedrus deodara)	1.0-1.4

Table 2.

Ranges of total nitrogen (percent total N on dry weight basis) in leaves of selected landscape tree species from three studies.

Tree species	Ranges(%)
Tree species	Perry and Hickman^{^z}	Mills and Jones^{^y}	Kopinga and van den Burg^*
White mulberry (Moms alba)	2.0-3.6	1.2-2.4	—
White birch (Betula pendula)	2.2-3.4	4.0-4.6	2.3-3.3
Goldenrain tree (Koelreuteria paniculata)	1.9-3.5	2.5-2.8	—
Silver maple (Acer saccharinum)	2.0-3.4	2.3-2.6	1.9-2.7
Honeylocust (Gleditsia triacanthos)	2.3-3.1	2.4-4.0	2.0-2.5
Crapemyrtle (Lagerstroemia indica)	1.1-3.5	1.6-2.1	—
Zelkova (Zelkova serrata)	1.8-2.8	2.3-3.1	—
Chinese pistache (Pistachia chinensis)	1.6-3.0	2.1-2.8	—
Eucalyptus (Eucalyptus spp.)	1.8-2.1	1.2-1.2	—
London planetree (Platanus acerifolia)	1.4-2.6	2.0-2.7	2.0-2.6
Tuliptree (Liriodendron tulipifera)	1.2-2.8	1.9-4.3	2.6-3.0
Bradford pear (Pyrus calleryana ‘Bradford’)	1.1-1.9	1.6-2.5	—

↵z After Perry and Hickman, Current Study. Samples taken from trees growing in landscapes.
↵y After Mills and Jones, 1996. Samples taken from trees growing in botanical gardens, field research plots, and field and container production nurseries.
↵* After Kopinga and van den Burg, 1995. Sample source not given.

Table 3.

Mean total nitrogen (percent total N on dry weight basis) in leaves of 25 landscape tree species.

Tree species	Mean (%)^{^z^y}
White mulberry (Morus alba)	2.9 a
Honeylocust (Gleditsia triacanthos)	2.8 ab
White birch (Betula pendula)	2.7 ab
Goldenrain tree (Koelreuteria paniculata)	2.6 b
Silver maple (Acer saccharinum)	2.6 b
Raywood ash (Fraxinus oxycarpa)	2.4 c
Valley oak (Quercus lobata)	2.3 c
White alder (Alnus rhombifolia)	2.3 c
Chinese pistache (Pistachia chinensis)	2.3 c
Modesto ash (Fraxinus velutina ‘Modesto’)	2.2 cd
Zelkova (Zelkova serrata)	2.2 cde
Crapemyrtle (Lagerstroemia indica)	2.2 cde
Chinese hackberry (Celtis sinensis)	2.2 cde
Chinese tallow tree (Sapium sebiferum)	2.1 cde
London planetree (Platanus acerifolia)	2.0 def
Tuliptree (Liriodendron tulipifera)	2.0 def
Eucalyptus (Eucalyptus spp.)	1.9 ef
Cork oak (Quercus suber)	1.9 f
Maidenhair tree (Ginkgo biloba)	1.9 f
Holly oak (Quercus ilex)	1.6 g
Olive (Olea europa)	1.6 g
Camphor tree (Cinnamomum camphora)	1.6 g
Bradford pear (Pyrus calleryana ‘Bradford’)	1-6 g
Southern magnolia (Magnolia grandiflora)	1.3 h
Deodar cedar (Cedrus deodara)	1.1 h