Vergara - 1976 - Physiological and morphological adaptability of ri

i
~
I20
cLniATF. AND RIFF.
[ml
(g
height
Relative
IR -e Sept,'l£.,19?1
1' I/ovoq a o _,' -
_ I
o.
in“ iifiiili ;
l
"
‘ |
1m
| 5
olllljAlkirllljlAlli tt- lritti ...t.t-,i
O 1050 1050 1050 105 l. Z 0
Conplernentary diffuse radiation flux tw/m?)
LJ|l|_1l||ll]lll|
o 2i 0 21 o 2t o 21
Diffuse radiation emamted irom plant layer, B(Z),C(Z)
tw/m?)
LAD(m2/n3)
3. Profiles of complementary diffuse radiation fluxes in rice canopies (Cdagzuva el al.. 1974a).
S = Q.,(h,):eos 13,11 I IT (sunlil leal)
or (6)
S = I, (shaded leat)
where Q.,(h,) is lhc intensity of direct solar radiation on a surface normal to
suns ray at solar elevation ofh,,. rL and r“ denote the direction of leaf normal
and sun. respectively, and L. is the sum of diffuse radiation fluxes impinging on
abaxial and adaxial surfaces of plant leaf.
Figure 4 represents the partition of solar radiation energy among the leaves
of rice crop. When the sun xvas low. most leaves were in shade and the leaf area
lit by radiation less than 3'0 \\-'/m= was predominant in the canopies. With an