Agriculture Reference
In-Depth Information
Fig. 2.6
Typical light-
response curves of early,
mid and late successional
species are shown. (From
Bazzaz 1979)
30
Early
20
Mid
10
Late
0
3
6
9
Light Intensity (1000 ft-c)
-10
140
slope=0.701***
120
Ad
100
Ca
Cj
80
Cs
Cs
*
Ma
60
Xm
Ol
Cp
Qm
Mt
40
Ns
Dp
Qg
Qr
Tc
As
Cu
Bn
20
Pv
0
0
50
100
150
200
250
LMA
(g
m
−2
)
Fig. 2.7
Leaf maturation period and leaf mass area across different evergreen broad-leaved tree
species (Miyazawa et al. 1998): Ad,
Actinidia deliciosa
; As,
Annona spragu
e
i
; Bn,
Brassica
napus
; Ca,
Coffea arabica
; Cp,
Connarus panamensis
; Cs,
Castanopsis sieboldii
; Cu,
Cucumis
sativus
; Dp,
Desmopsis panamensis
; Ma,
Morisonia americana
; Ol,
Ouratea lucens
; Qr,
Quercus
rubra
; Tc,
Theobroma cacao
; Xm,
Xylopia micrantha
.
Open squares
, species attaining full pho-
tosynthetic capacity before full leaf expansion;
open triangles
, species attaining full photosyn-
thetic capacity at full expansion;
closed squares
, delayed greening;
d
, days
only in August (Matsumoto 1984); in
Pinus pumila
, full photosynthetic capacity is
attained only in September or even the following spring (Kajimoto 1990). Evergreen
broad-leaved trees such as
Machilus thunbergii
,
Castanopsis sieboldii
, and
Quercus glauca
show similar delay in foliar development (Kusumoto 1961;
Miyazawa et al. 1998). In general, broad-leaved evergreen species with heavier, longer-
lived leaves take longer to develop their full photosynthetic capacity (Miyazawa
et al. 1998; Fig.
2.7
).
