Scientia Silvae Sinicae ›› 2022, Vol. 58 ›› Issue (6): 110-121.doi: 10.11707/j.1001-7488.20220611
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Lixuan Wang,Guang Yang*,Jiaqi Gao,Xin Zheng,Zhaoguo Li,Yuetai Weng,Xueying Di,Hongzhou Yu
Received:
2020-12-28
Online:
2022-06-25
Published:
2022-09-24
Contact:
Guang Yang
CLC Number:
Lixuan Wang,Guang Yang,Jiaqi Gao,Xin Zheng,Zhaoguo Li,Yuetai Weng,Xueying Di,Hongzhou Yu. Changes in the Flammability of Post-Fire Aboveground Litter of Larix gmelinii[J]. Scientia Silvae Sinicae, 2022, 58(6): 110-121.
Table 1
Basic information of Larix gmelinii natural forest after fire"
样地代号 Plot code | 火灾时间 Time of fire | 落叶松平均胸径 Mean DBH of L. gmelinii (cm) | 优势灌木 Dominant shrub | 落叶松占比 Percentage of L. gmelinii (%) | 海拔 Altitude/m | 坡度 Slope(°) | 坡向 Aspect(°) |
1990A | 13.63 | Le, Va | 87.2 | 450 | 4 | 315 | |
1990B | 1990-04 | 15.07 | Le | 85.7 | 433 | 3 | 290 |
1990C | 24.37 | Le | 50 | 439 | 4 | 309 | |
1994A | 7.62 | Le, Va | 50 | 654 | 6 | 30 | |
1994B | 1994-07 | 9.74 | Le, Va | 61.9 | 650 | 3 | 107 |
1994C | 12.27 | Le, Va | 70.9 | 672 | 6 | 116 | |
1996A | 11.35 | Le, Va | 88.9 | 473 | 2 | 48 | |
1996B | 1996-08 | 10.08 | Le, Va | 97.1 | 472 | 2 | 64 |
1996C | 11.75 | Le, Va | 87.9 | 486 | 1 | 34 | |
2000A | 17.21 | Le, Va | 90 | 795 | 8 | 86 | |
2000B | 2000-09 | 14.07 | Le, Va | 90 | 778 | 4 | 62 |
2000C | 21.38 | Le, Va | 96.6 | 798 | 9 | 94 | |
2006A | 12.82 | Le, Rh | 64.4 | 519 | 2 | 209 | |
2006B | 2006-09 | 12.94 | Le, Rh | 76.9 | 511 | 3 | 212 |
2006C | 25.05 | Le | 52.4 | 518 | 1 | 200 | |
2010A | 2010-06 | 18.31 | Le | 100 | 837 | 6 | 58 |
2012A | 8.59 | Le, Rh | 79.4 | 448 | 10 | 258 | |
2012B | 2012-04 | 8.48 | Le, Rh | 89.6 | 463 | 9 | 282 |
2012C | 9.53 | Le, Rh | 85.3 | 458 | 10 | 308 | |
2015A | 26.81 | Le, Rh | 86.7 | 660 | 13 | 123 | |
2015B | 2015-07 | 26.75 | Ru | 80 | 669 | 7 | 93 |
2015C | 26.46 | Le、Rh | 82.6 | 661 | 10 | 104 | |
CK A | 9.08 | Le | 100 | 430 | 2 | 15 | |
CK B | 对照组CK | 12.48 | Le, Va | 94.6 | 450 | 2 | 13 |
CK C | 13.28 | Va, Rh | 87.5 | 423 | 1 | 115 |
Fig.1
Fat content, ash content, higher heating value and ash free calorific value of aboveground litter with different time over fire The error bar is the standard deviation, different small letters in the same group showed significant difference in the contents of each index in different recovery time (P < 0.05). ESR, MSR, LSR and CK are the early, middle, late stages of restoration and control group, respectively, the same below."
Fig.3
Pearson correlation analysis of fat content, ash content, higher heating value, ash free calorific value, enzyme content and environmental factors of aboveground litter. *: At the 0.05 level (two tailed), the correlation was significant; **: At the 0.01 level (two tailed), the correlation was significant. The translation in the fat, ash, higher heating value, ash free calorific value, hemicellulase, ligninase content and cellulase, adopts abbreviations, namely Fat%, Ash%, HHV, AFCV, HC, L and C, the same below."
Table 2
Paired sample t test of litter and fermentative at the same time of restoration"
配对差值Pairing difference | t | df | P (双尾Two tails) | 相关性 Relevance | 显著性 Significance | |||||
样本 Sample | 平均值 Average | SD | MSD | CID | ||||||
下限 Lower limit | 上限 Upper limit | |||||||||
Fat% | 1.157 17 | 0.884 16 | 0.102 09 | 0.953 75 | 1.360 60 | 11.334 | 74 | 0.000 | 0.219 | 0.059 |
HHV | 1.226 45 | 0.849 15 | 0.098 05 | 1.031 08 | 1.421 82 | 12.508 | 74 | 0.000 | 0.114 | 0.329 |
Ash% | -22.000 60 | 15.554 44 | 1.796 07 | -25.579 35 | -18.421 85 | -12.249 | 74 | 0.000 | 0.362 | 0.001 |
AFCV | 0.112 20 | 0.733 90 | 0.084 74 | -0.056 66 | 0.281 05 | 1.324 | 74 | 0.190 | -0.111 | 0.342 |
HC | 0.075 67 | 0.603 25 | 0.069 66 | -0.063 13 | 0.214 46 | 1.086 | 74 | 0.281 | 0.221 | 0.057 |
L | 0.030 65 | 0.180 76 | 0.020 87 | -0.010 94 | 0.072 24 | 1.469 | 74 | 0.146 | 0.021 | 0.861 |
C | 0.086 60 | 0.846 63 | 0.097 76 | -0.108 19 | 0.281 39 | 0.886 | 74 | 0.379 | 0.360 | 0.002 |
Fig.4
Fat content, ash content and higher heating value coupling model of aboveground litter over fire A: The coupling model of fat-calorie; B: The coupling model of ash content and high calorific value in litter and fermentative layer; C: The coupling model of ash content and high calorific value in aboveground litter."
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