Soil Characteristics and Lodgepole Pine (Pinus contorta var. latifolia) Performance Two Decades after Disk Trenching of Unburned and Broadcast-Burned Plots in Subboreal British Columbia
Table 3
Treatment1 effects2 on lodgepole pine 100 needle weight and foliar nutrient concentrations after 10 and 20 years.
Burning effects
Position effects
Burning × position effects
Year
Unburned
Burned
value3
Control
Hinge
Trench
valve
UB-C
UB-H
UB-T
B-C
B-H
B-T
value
100 needle weight
Weight (g)
10
2.01 ± 0.07
2.24 ± 0.07
0.068
2.15 ± 0.07
2.16 ± 0.07
2.06 ± 0.07
0.407
2.01 ± 0.10
2.03 ± 0.10
1.98 ± 0.10
2.28 ± 0.10
2.29 ± 0.10
2.13 ± 0.10
0.684
20
3.42 ± 0.16
3.45 ± 0.16
3.14 ± 0.16
Foliar nutrient concentration
N (g kg−1)
10
12.4 ± 0.3
12.6 ± 0.3
0.663
12.0 ± 0.4
12.7 ± 0.4
12.7 ± 0.4
0.304
11.6 ± 0.5
12.8 ± 0.6
12.7 ± 0.6
12.4 ± 0.6
12.6 ± 0.6
12.7 ± 0.5
0.579
20
11.4 ± 0.5
10.6 ± 0.5
10.9 ± 0.5
P (g kg−1)
10
1.77 ± 0.04
1.77 ± 0.04
0.935
1.75 ± 0.04
1.79 ± 0.04
1.78 ± 0.04
0.729
1.72 ± 0.05
1.80 ± 0.05
1.80 ± 0.06
1.78 ± 0.06
1.78 ± 0.06
1.76 ± 0.05
0.601
20
1.47 ± 0.05
1.41 ± 0.05
1.46 ± 0.05
K (g kg−1)
10
6.18 ± 0.18
6.24 ± 0.18
0.843
6.18 ± 0.17
6.34 ± 0.18
6.12 ± 0.17
0.557
6.05 ± 0.23
6.40 ± 0.25
6.10 ± 0.25
6.30 ± 0.25
6.28 ± 0.25
6.14 ± 0.23
0.666
20
5.59 ± 0.25
5.79 ± 0.25
5.61 ± 0.25
S (g kg−1)
10
1.10 ± 0.02
1.16 ± 0.02
0.041
1.10 ± 0.02 b
1.10 ± 0.02 b
1.18 ± 0.02 a
0.008
1.05 ± 0.02
1.10 ± 0.03
1.16 ± 0.03
1.16 ± 0.03
1.10 ± 0.03
1.21 ± 0.02
0.121
20
0.83 ± 0.03
0.79 ± 0.03
0.79 ± 0.03
Ca (g kg−1)
10
2.11 ± 0.09
2.00 ± 0.09
0.381
2.06 ± 0.07
2.03 ± 0.08
2.08 ± 0.07
0.735
2.02 ± 0.10
2.10 ± 0.11
2.23 ± 0.11
2.10 ± 0.11
1.95 ± 0.11
1.94 ± 0.10
0.057
20
1.58 ± 0.08
1.78 ± 0.08
1.64 ± 0.08
Mg (g kg−1)
10
0.86 ± 0.02
0.80 ± 0.02
0.089
0.84 ± 0.02
0.86 ± 0.02
0.79 ± 0.02
0.120
0.87 ± 0.03
0.87 ± 0.03
0.85 ± 0.03
0.81 ± 0.03
0.85 ± 0.03
0.74 ± 0.03
0.453
20
1.07 ± 0.05
1.08 ± 0.05
1.15 ± 0.05
SO4-S (mg kg−1)
10
52.7 ± 4.2
58.3 ± 4.3
0.298
54.6 ± 4.1
53.0 ± 3.9
58.9 ± 3.9
0.344
47.5 ± 5.2
51.0 ± 5.5
59.8 ± 5.5
61.8 ± 6.2
55.0 ± 5.5
58.1 ± 5.2
0.212
20
66.3 ± 6.3
76.9 ± 6.3
85.2 ± 6.3
Total Fe ( mg kg−1)
10
36 ± 5
47 ± 5
0.167
37 ± 6
37 ± 7
50 ± 6
0.319
35 ± 9
35 ± 10
37 ± 10
40 ± 10
40 ± 10
62 ± 9
0.454
20
27 ± 2
29 ± 2
31 ± 2
Active Fe (mg kg−1)
10
29 ± 1
32 ± 1
0.090
31 ± 1
32 ± 1
29 ± 1
0.134
29 ± 2
32 ± 2
27 ± 2
33 ± 2
33 ± 2
31 ± 2
0.591
20
28 ± 1
26 ± 1
24 ± 1
Cu (mg kg−1)
10
4.63 ± 0.18
4.58 ± 0.18
0.852
4.33 ± 0.22
4.63 ± 0.23
4.88 ± 0.22
0.238
4.40 ± 0.29
4.75 ± 0.33
4.75 ± 0.33
4.25 ± 0.33
4.50 ± 0.33
5.00 ± 0.29
0.706
20
3.37 ± 0.28
3.16 ± 0.28
3.33 ± 0.28
Mn (mg kg−1)
10
351 ± 23
257 ± 23
0.029
293 ± 20
316 ± 20
302 ± 20
0.535
336 ± 28
367 ± 29
350 ± 29
250 ± 29
266 ± 29
255 ± 28
0.930
20
292 ± 27
336 ± 27
190 ± 27
B (mg kg−1)
10
10.7 ± 0.7
11.7 ± 0.7
0.378
11.3 ± 0.6
11.0 ± 0.6
11.2 ± 0.6
0.832
10.9 ± 0.8
10.5 ± 0.8
10.8 ± 0.8
11.8 ± 0.8
11.5 ± 0.8
11.7 ± 0.8
0.991
20
7.9 ± 1.5
6.5 ± 1.5
6.1 ± 1.5
Al (mg kg−1)
10
828 ± 25
851 ± 25
0.529
828 ± 24
828 ± 25
862 ± 24
0.405
807 ± 32
805 ± 35
870 ± 35
848 ± 35
850 ± 35
854 ± 32
0.507
20
547 ± 24
525 ± 24
517 ± 24
Zn (mg kg−1)
10
42.9 ± 0.7
43.7 ± 0.7
0.451
41.7 ± 0.8
44.0 ± 0.9
44.2 ± 0.8
0.103
41.2 ± 1.1
42.8 ± 1.2
44.8 ± 1.2
42.3 ± 1.2
45.3 ± 1.2
43.6 ± 1.1
0.337
20
46.3 ± 2.0
46.6 ± 2.0
43.2 ± 2.0
1 Refer to Table 1 for treatment abbreviations. 2Values are mean ± one standard error. Letters are supplied only for variables where the Bonferroni test found significant differences between individual means within a given year. Means having the same letter do not differ significantly () within the given year according to the Bonferroni test. 3 values in bold indicate .
