Table 6.2.
Mean (±
SE) number of acorns, percentage of aborted acorns, and mean (±
SE) acorn size, including aborted fruits, of holm oak fruit fall in plots
receiving nitrogen vs. no nitrogen fertilizer, irrigation
vs. no irrigation, and control plots during 3 years· of study at Prades. For each row n = 12
plots, except
in the control plots where n =
3 b
1989-1990
1990-1991
1991-1992
Plots
Number of Abortion
Acorn size
Number of
Abortion
Acorn size
Number
Abortion
Acorn size
receiving
acorns
(%)
(g)
acorns
(%)
(g)
acorns
(%)
(g)
(m 2
year-I)
(m 2
year-I)
(m 2
year-I)
No nitrogen
26 ± 12
98
0.08 ± 0.03
323 ± 53
71
0.20 ± 0.03
305 ± 52
64
0.18 ± 0.01
Nitrogen
49 ± 12**
99
0.04 ± 0.Ql
571 ± 82*
71
0.20 ± 0.04
499 ± 116*
61*
0.18 ± 0.01
No irrigation
12 ± 3
100
0.08
±0.02
462 ± 95
87
0.09 ±0.02
582 ± 105
64
0.18 ± 0.01
Irrigation
62 ± 14***
97
0.04 ± 0.Ql
432 ± 57
55**
0.31 ± 0.02***
222 ± 29***
61
0.19 ± 0.01
Control plots
11 ± 9
100
0.04 ± 0.03
209 ± 86
80
0.13 ± 0.04
406 ± 149
64
0.19 ± 0.04
-
..
_ ..
_ -
_ . _ ....
_ . _ ..
• Years defined from 1 April to 31
March.
b
ANOVA signification: *
=
P<0.05; **
=
P = P i !:"
Q
::s
trl
8
0'
~
"-l
\0