en
Table 22.1.
Weight and nutrient amounts o( (orest noor and slash o n the experimental plo ts be(ore burning (August 1988)
and after burning (November
0
=0
1988).
n
= 20
(o r forest noor and n
= 10
for slash
'Tl
'"
::l
Fraction
Weight
C
N
P
S
Ca
Mg
K
Na
=0
Before burning (kg ha- ')
~.
;I>
;::>
Sla. sh
'"
..,
Leaves
12309
6191
160.0
12.3
13.5
118.2
12.3
89.9
2.7
~
..,
Stems
61805
30161
556.2
80.3
74.2
908.5
74.2
451.2
6.2
'"
.,
Total
Mean
74114
36352
716.3
92.7
87.7
1026.7
86.5
541.0
8.9
::l
Po
SO
(11730)
(5724)
(105.6)
(15.2)
(14.1 )
(172.4)
(l4 . 1 )
(85.6)
( 1.2)
(")
"
Forest noor
.,
';'
L
4500
2173
50.5
3.5
5.0
70.4
5.4
13.6
1.0
Q
F
9820
4384
109. 1
10.9
10.8
145.6
21.5
41.0
3.6
;::;
5'
H
24960
5776
37 1.3
27.0
35.4
488.9
127.5
89.7
7.0
OQ
Total
Mean
39150
12333
530.9
41.4
51.2
704.9
154.5
144.3
11.6
so
(16530)
(4129)
(246.0)
( 17.4)
(23.1)
(328.3)
(81.4 )
(58.8)
(4.6)
Total before burning
Total
Mean
113264
48685
1247. 1
134.1
138.9
1731.6
240.9
685.3
20.4
SO
(20269)
(7058)
(267.7)
{23.1}
(27.0)
(370.9)
(82.6)
(103.9)
(4.8)
After burning (kg ha -')
Forest noo r
Ashbed
15825
4448
175.0
57.7
35.6
1219.6
101.5
258.5
8.1
H
18640
4397
269.4
26.5
31.0
603.5
97.2
94.6
5.5
Total
Mean
34449
8845
444.4
84.2
66.5
1823.2
198.8
353.0
13.6
SO
(23086)
(4786)
(285.6)
(35.8)
(34.8)
(840.7)
{I
06.9)
(143.8)
(6.5)
Losses during the fire (kg ha - ')
Total
Mean
78815
39840
802.7
49.9
72.4
- 91.6
42.2
332.3
6.8
SD
(30721)
(8527)
(391.4)
(42.6)
(44.0)
(918.8)
(135.1 )
( 177.4)
(8. 1)
Percentage'
70
82
64
37
52
- 5
18
48
33
• Element loss as percentage of pre-fire amount.
""
.....
....,