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内蒙干旱地区杨树人工用材林灌溉量与林木生长量 总被引：2，自引：0，他引：2
对内蒙古干旱河套黄灌区群众杨人工用材林的适宜灌溉量的研究表明，在林木生长后期增加灌水次数，可使胸径生长增加０．２５￣０．４２ｃｍ。树冠生长指标和根系生长量均随灌溉量增加而增加，１５００、４５００、７５００、２２５００ｍ＾３／ｈｍ＾２·ａ灌溉量的平均叶面积分别为１９．３、２４．５、３０．５、４３．４ｍ＾２；平均叶干重分别是１．１、１．３、１．５、３．９ｋｇ；平均叶面积指数分别为０．９７、１．２３、１ 相似文献
3.
对内蒙古干旱河套黄灌区群众杨人工用材林的适宜灌溉量的研究表明，在林木生长后期增加灌水次数，可使胸径生长增加０．２５～０．４２ｃｍ。树冠生长指标和根系生长量均随灌溉量增加而增加，１５００、４５００、７５００、２２５００ｍ３／ｈｍ２·ａ灌溉量的平均叶面积分别是１９．３、２４．５、３０．５、４３．４ｍ２；平均叶干重分别是１．１、１．３、１．５、３．９ｋｇ；平均叶面积指数分别为０．９７、１．２３、１．５３、２．１８。林木蒸腾量随灌溉量增加而增加，年蒸腾耗水量分别为１２５９．７、１５２７．７、１９８８．４、４９８６．１ｍ３／ｈｍ２。在一定范围内，林木材积生长量随灌溉量增加而增加，年产材积量分别为３．０４、４．０８、４．５１、８．７３ｍ３／ｈｍ２。虽然２２５００ｍ３／ｈｍ２·ａ灌溉量的产材量最高，但材积需水系数最高，其耗水量是其它灌溉量的３～１５倍。在水资源日益短缺的内蒙干旱地区，杨树人工林的灌溉量以７５００ｍ３／ｈｍ２·ａ为宜。 相似文献
4.
根据５ａ定位观测，对尖峰岭热带山地雨林更新林生态系统的水文化学循环规律数据分析表明，年均降雨量为２６６８．３ｍｍ，其中总径流量占４６．７％，蒸散量５３．３％，冠层留量１４．０％。Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ的年均降雨输入量为７８．４ｋｇ（ｈｍ＾２．ａ），总径流输出５６．７ｋｇ／（ｈｍ＾２．ａ），净积累２１．６ｋｇ／（ｈｇｍ＾２．ａ），Ｓｉ，有机Ｃ、Ａｌ、Ｍｎ的年均降雨输入量为２５．０ｋｇ（ｈｍ＾２．ａ） 相似文献
5.
哀牢山木果石栎林降雨过程中的养分循环 总被引：1，自引：0，他引：1
本文以云南哀牢山国家级自然保护区中山湿性常绿阔叶林的主要森林类型－木果石栎林为研究对象，分析了大气降雨对该生态系统地养分循环。结果表明，以大气降雨，穿透雨和树木干流为养分输入，以地表迳流和土壤渗漏为养分输出的养分循环过程中Ｎ、Ｐ、Ｋ，Ｃａ等分别增加了１５．９４１ｋｇ／ｈｍ＾２．ａ，０．３５３ｋｇ／ｈｍ＾２．ａ，３．８３ｋｇ／ｈｍ＾２．ａ和１．２０１ｋｇ／ｈｍ＾２．ａ而Ｍｇ减少了０．６５４ｋｇ／ｈｍ 相似文献
6.
杉木光皮桦混交林效益的调查研究 总被引：2，自引：0，他引：2
对桂西北杉木光皮桦混交林和杉木纯林的对比研究表明,３５年生杉桦混交林的立木蓄积量为４４１．０８７ｍ＾３／ｈｍ＾２,比杉木纯林高３．６％。混交林枯枝地层现存量及其Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ五种元素的积累量分别为１３．１８ｔ／ｈｍ＾２和２９９．５ｋｇ／ｈｍ＾２,分别比杉木纯林高９．７％和６９．９％。８混交林地（０～１００ｃｍ）土壤容重为０．８１～１．２２ｇ／ｃｍ＾３,比杉木纯林低１．０％～８．０％,而土壤孔隙度,通气度和持水量分别比杉木纯林高２．０％～３．９％。土壤有机质、全氮、水解氮、有效磷和速效钾分别比杉木纯高５．５％～４９．８％。 相似文献
7.
根据５ａ定位观测，对尖峰岭热带山地雨林更新林生态系统的水文化学循环规律的数据分析表明，年均降雨量为２６６８．３ｍｍ，其中总径流量占４６．７％，蒸散量５３．３％，冠层截留量１４．０％。Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ的年均降雨输入量为７８．４ｋｇ／（ｈｍ２·ａ），总径流输出５６．７ｋｇ／（ｈｍ２·ａ），净积累２１．６ｋｇ／（ｈｍ２·ａ）；Ｓｉ、有机Ｃ、Ａｌ、Ｍｎ的年均降雨输入量为２５．０ｋｇ／（ｈｍ２·ａ），总径流输出为１１２．３ｋｇ／（ｈｍ２·ａ），净损失８７．３ｋｇ／（ｈｍ２·ａ），更新林系统仅处于更新进展过程中，同时证实了冠层对降水化学的淋溶效应，净淋溶系数达４．１１；提出了降雨、林内净降雨、总径流的各水化学物含量与其相应水量的回归模式 相似文献
8.
9.
施肥对尾叶桉无性系MLA生长影响的研究 总被引：6，自引：3，他引：3
在雷州林业局两个试验点进行了尾叶桉无性系ＭＬＡ施肥试验,林龄３８个月生的结果表明：处理⑥（Ｐ３００ｇ／株＋Ｋ３００ｇ／株＋１５０ｇ／株）的平均蓄积生长量为２９．２４ｍ＾３／ｈｍ＾２．ａ,比处理⑦（常规施肥,滤泥５０００ｇ／株＋Ｐ２５０ｇ／株＋Ｋ１５０ｇ／株）的平均蓄积生长量２６．２６ｍ＾２／ｈｍ＾２．ａ大１１;３％,比ｃｋ（不施肥）的平均蓄积生长量６．３９ｍ＾３／ｈｍ＾２．ａ大３５７．５９％,比总 相似文献
10.
巨峰葡萄高产栽培技术 总被引：1，自引：0，他引：1
宜兴市分水林场于１９９３年高标准地种植巨峰葡萄６－８７ｈｍ２。该园地被排灌沟渠和道路分隔成１２个种植小区。园地深翻后筑高畦宽床，开大塘施足基肥植苗（株行距１ｍ×３ｍ，每公顷３３００株后；改成２ｍ×３ｍ，每公顷１６５０株）。棚架为用１－８ｍ高水泥柱搭建的平棚。经３ａ的精细管理，在１９９６，１９９７年连续获得了高产。１９９６年产量３８３４３ｋｇ／ｈｍ２，采收实绩每公顷产３０１４４ｋｇ。品质比对照单穗平均重３４５ｇ，增加２２－３％；单果平均重１１－２ｇ，增加５－７％；可溶性固形物１６－２，增加１３－２… 相似文献
11.
１９８４～１９９６年在江西分宜县中国林科院亚热带林业实验中心的３个林场,分别对杉木人工林幼龄林、中龄林及近熟林进行了８组水土保持及养分循环方面多点的试验观测,对杉木人工林水土流失及养分损耗作了研究。结果表明,杉木人工林水土流失以幼林阶段为最大,其次中龄林阶段,最小是近熟林阶段。幼龄林地表迳流量为５４６．０ｍ＾３．ｈｍ＾－２,土壤侵蚀总量为１０５０．０ｋｇ．ｈｍ＾－２,土壤侵蚀量尤为明显;中龄林地表迳流量为５０６．９８ｍ＾３．ｈｍ＾－２;而近熟林地表迳流量为４７７．２５ｍ＾３．ｈｍ＾－２,土壤侵蚀量可略而不计。幼龄林流失有机质５０．０４９ｋｇ．ｈｍ＾－２,养分为３１．５０８ｋｇ．ｈｍ＾－２;中龄林流失有机质为６．０８０ｋｇ．ｈｍ＾－２,养分流失量为２．０９６ｋｇ．ｈｍ＾－２,而近熟林养分流失量为１０．７８４ｋｇ． 相似文献
12.
Daxing'a11lingforcstregionislocatedintllcllorthcrnpart0fcoldten1peratczoncinChinacharctcri/cdbyl1arsl1climate,shortagcofacculnulatcdtcn1pcraturc,shortgrowingscas0n.Io\`s0iltel1lpcraturclncarly'sprlng'ctcThcmodclsforcultl\'atingsccdlingsarediffcrcntfrol11tI1oscinotherrcgions.lnordcrtoflndouttI1coptll11ul11l11odclsforcultl1atingsccdllngsofDahurlnlarcI1'oncof111alntimbcrtrccspcclcsinthlsrcglon.\"chadcarriedoutcxpcrilllcntlYo111l()89toI9()3andobtaincdtllcsllllplcbutpracticallncthodlbrdctcnnining… 相似文献
13.
Multipurpose tree species （MPTs） were studied in an agroforestry arboretum under subtropical humid climate in Northeast India. Out of 12 MPTs planted under agroforestry systems, Acacia auriculiformis in spacing of 2 m × 2 m （2500 stems·hm^-2） could have the potentiality to meet the timber/fuelwood requirement due to its high wood production of 635 m^3·hm^-2 with mean annual increment （MAI） of 2.54×10^-2 m^3.treel.a^-1 in a short rotation period of 10 years. Thus, A. auriculiformis is a short rotation forest tree species suitable to grow in subtropical humid climate. On the other hand, at 16 years of age, Eucalyptus hybrid and Michelia champaca in spacing of 3 m × 3 m （1111 stems.hm^2） produced appreciably high timber volume of 315 m^3.hm^-2 and 165 m^3.hm^-2 with MAI of 1.77×10^-2 m^3.tree^-1·a^-1 and 0.92×10.2 m^3.tree^-1.a^-1, respectively. At 16 years of age, Gmelina arborea produced a timber volume of 147 m^3.hm^-2 with MAI of 1.47×10^-2 m^3.tree^-1.a^-1 followed by Samania saman （140 m^3.hm^-2）, Albizziaprocera （113 m^3·hm^-2） and Tectona grandis （79 m3.hm^-2） with MAI of 1.40, 1.13 and 0.78 × 10^-2 m^3 .tree^-1a^-1, respectively in 4 m × 4 m spacing （625 stems.hm^-2）. Gliricidia maculata and Leucaena leucocephala could be used as live fences around the farm boundary to supply their N-rich leaves for mulch as well as manure to crops. In agroforestry arboretum, direct seeded upland rice （Oryza sativa - variety, AR-11）, groundnut （Arachis hypogaea - variety, JL-24） and sesamum （Sesamum indicum - variety, B-67） were grown during the initial period upto 8 years of tree establishment. Under other MPTs, there was a reduction in crop productivity as compared to open space. After 8 years of tree establishment, horti-silvi and silvi-pastoral systems were developed and pineapple （Ananas comosus - variety Queen）, turmeric （Curcuma longa -variety RCT -1） and cowpea （Vigna sinensis - variety Pusa Barsati） as forage crop were raised. The productivity of p 相似文献
14.
Zhenhong Wang Chengbo Yang Limei Yang Zizong Zhou Jing Rao Li Yuan Ju Li 《Frontiers of Forestry in China》2007,2(1):18-27
In recent years, the relationship between biodiversity and ecosystem stability, productivity, and other ecosystem functions
has been extensively studied by using theoretical approaches, experimental investigations, and observations in natural ecosystems;
however, results are controversial. For example, simple systems were more stable than complex systems in theoretical studies,
and higher productivity was observed in human-made ecosystems with poorer species composition, etc. The role of biodiversity
in the ecosystem, such as its influence on sustainability, stability, and productivity, is still not understood. Because accelerated
soil-erosion in various ecosystems has caused a decrease of primary productivity, a logical way used in the study of the relationship
between biodiversity and ecosystem function can be used to study the relationship between plant species diversity and soil
conservation. In addition, biodiversity is a product of evolutionary history, and soil erosion is a key factor controlling
the evolution of modern environment on the surface of the Earth. A study on the relationship between biodiversity and soil-erosion
processes could help us understand the environmental evolution of Earth.
Fifteen 10 m × 40 m standard runoff plots were established to measure surface runoff, soil erosion, and total P loss in different
secondary communities of semi-humid evergreen broad-leaved forests that varied in composition, diversity, and level of disturbance
and soil erosion. The following five communities were studied: AEI (Ass. Elsholtzia fruticosa + Imperata cylindrical), APMO (Ass. Pinus yunnanensis + Myrsine africana + Oplismenus compsitus), APLO (Ass. Pinus yunnanensis + Lithocarpus confines + Oplismenus compsitus), AEME (Ass. Eucalyptus smith + Myrsine africana + Eupatorium adenophorum), and ACKV (Ass. Cyclobalanopsis glaucoides + Keteleeria evelyniana + Viola duelouxii). Tree density, the diameter of the tree at breast height, and the hygroscopic volume of plant leaves were determined in
each plot.
Results indicated that surface runoff, soil erosion, and total P loss decreased as a power function with increase in plant
species diversity. Their average values for three years were 960.20 m3/(hm2 · year), 11.4 t/(hm2 · year), and 127.69 kg/(hm2 · year) in the plot with the lowest species diversity, and 75.55 m3/(hm2 · year), 0.28 t/(hm2 · year), and 4.71 kg/(hm2 · year) in the plot with the highest species diversity, 12, 50, and 25 times respectively lower compared with the lowest
species diversity plots. The coefficients of variation of surface runoff, soil erosion, and total P loss also followed a power
function with the increase of plant species diversity, and were 287.6, 534.21, and 315.47 respectively in the lowest species
diversity plot and 57.93, 187.94, and 59.2 in the highest species diversity plot. Enhanced soil conservation maintained greater
stability with increased plant species diversity. Plant individual density increased linearly and the canopy density and cross
section at breast height increased logarithmically with the increase of plant species diversity. The hydrological function
enhanced as the plant species diversity increased. There were obviously relationships between plant species diversity and
rainfall interception, coverage, and plant individual density, which was related to soil conservation functions in the five
forest communities.
The complex relationships between plant species diversity and the above-mentioned ecological processes indicated that plant
species diversity was an important factor influencing the interception of rainfall, reducing soil erosion and enhancing the
stability of soil conservation, but its mechanism is not known. This experiment showed that plant species diversity promoted
soil and nutrient conservation and ultimately lead to the increase of the primary productivity of the ecosystem, and was thus
a good way to study the relationship between biodiversity and ecosystem stability. Rainfall interception could be assessed
easily using the hygroscopic volume of plant leaves. Because there were strong correlations between plant species diversity
and soil conservation functions, the patterns of plant species diversity will show a certain level of predictability on the
interactions of life systems with surface processes of the Earth.
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Translated from Journal of Plant Ecology, 2006, 30(3): 392–403 [译自: 植物生态学报 相似文献
15.
Xingliang Liu Qinyan Ma Dongsheng Yang Zuoming Shi Yiming Su Shiqiang Zhou Shirong Liu Yupo Yang 《Frontiers of Forestry in China》2006,1(4):379-386
This study investigated root biomass and productivity in dominant populations in western Sichuan, China. A total of 4 plots
(Picea balfouriana plantation for 22 age in Maerkang, 9 trees, mean DBH of population for 10.4 cm and height for 10.5 m; Larix maxteriana plantation for 22 age in Wolong, 9 trees, mean DBH of population for 17.0 cm and height for 13.8 m; Abies fabri plantation for 35 age in Ebian, 18 trees, mean DBH of population for 14.1 cm and height for 11.9 m; Larix kaempferi plantation for 23 age in Miyaluo, 8 trees, mean DBH of population for 17.4 cm and height for 14.5 m; a 20 m×25 m plot located
on each of the 4 types in western Sichuan, China) were randomly selected and excavated to a depth of 60 cm for each of the
4 plantation types. To estimate the root biomass of an individual tree using D
2
H, an exponential model was selected with the highest coefficient ranging from 0.94 to 0.99. The total root biomass per hm2 varied among plantation population types following the order: L. kaempferi (37.832 t/hm2) > A. fabri (24.907 t/hm2) > L. maxteriana (18.320 t/hm2) > P. balfouriana (15.982 t/hm2). The biomass fractions of a given root size class compared to the total root biomass differed among plantation population
types. For all 4 studied plantation types, the majority of the roots were distributed in the top 40 cm of soil, e.g., 97.88%
for P. balfouriana population, 96.78% for L. maxteriana, 95.65% for A. fabri, and 99.72 for L. kaempferi population. The root biomass fractions distributed in the top 20 cm of soil were 77.13% for P. balfouriana, 77.13% for L. maxteriana, 65.02% for A. fabri and 80.66% for L. kaempferi, respectively. The root allocation in the 0–20, 20–40, and 40–60 cm soil layers gave ratios of 34:12:1 for P. balfouriana, 24:6:1 for L. maxteriana, 15:7:1 for A. fabri, and 64:4:1 for L. kaempferi populations. The root biomass density of dominant plantation population was 10.782 t/(hm2·m) for P. balfouriana, 8.230 t/hm2·m) for L. maxteriana, 24.546 t/(hm2·m) for A. fabri, and 13.211 t/(hm2·m) for L. kaempferi population, respectively. The root biomass productivity was found to be 0.57 t/(hm2·year) for P. balfouriana, 0.83 t/(hm2·year) for L. maxteriana, 0.71 t/(hm2·year) for A. fabri and 1.64 t/(hm2·year) for L. kaempferi population, respectively.
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Translated from Acta Ecologica Sinica, 2006, 26(2): 542–551 [译自: 生态学报, 2006, 26(2): 542–551] 相似文献
16.
The role of canopy interception on nutrient cycling in Chinese fir plantation ecosystem was studied on the basis of the position
data during four years. Results indicate that the average canopy interception amount was 267.0 mm/year. Canopy interception
play a significant role in water cycle and nutrient cycle processes in ecosystem, and was an important part of evaporation
from the Chinese fir plantation ecosystem, being up to 27.2%. The evaporation from the canopy interception was an important
way of water output from ecosystem, up to 19.9%. The flush-eluviation of branches and leaves caused by canopy interception
brought nutrient input of 143.629 kg/(hm2 · year), which was 117.2% of the input 63.924 kg/(hm2 · year) from the atmospheric precipitation. The decreased amount of 80.1 mm precipitation input caused by canopy interception
reduced the amount of rainfall into the stand surface and infiltration into the soil, reduced the output with runoff and drainage,
and decreased nutrient loss through output water. Therefore, the additional preserve of nutrient by canopy interception was
8.664 kg/(hm2 · year).
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Translated from Scientia Silvae Sinicae, 2006, 42(12): 1–5 [译自: 林业科学] 相似文献
17.
[目的]探讨不同造林密度对米老排人工林生长的影响规律,为米老排人工林定向培育过程中的密度控制提供参考。[方法]以广东省云浮市造林后6年生米老排人工林为研究对象,对不同造林密度(625、833、1 111、1 667、2 500株·hm~(-2))林分平均树高、优势木高、胸径、保留率和枝下高等生长指标进行连续4年调查。[结果]表明:随着造林密度的增大,米老排林分平均胸径、胸径连年生长量、保留率、单株材积和材积连年生长量均显著减小,而枝下高、林分蓄积量和蓄积连年生长量显著增加。在一定密度范围内,造林密度对林分高生长的影响比较小。造林后第6年,密度1 667株·hm~(-2)林分的平均树高最大(11.4 m),优势木高以密度1 111株·hm~(-2)林分的最大(13.3m),树高连年生长量以密度625株·hm~(-2)林分的最大(1.5 m·a~(-1));密度625株·hm~(-2)林分的平均胸径、胸径连年生长量、单株材积和材积连年生长量均最大,分别为14.3 cm、2.5 cm·a~(-1)、0.097 3 m~3和0.038 2 m~3·a~(-1),比密度2 500株·hm~(-2)林分的分别增加27.7%、81.0%、49.0%和82.4%;密度2 500株·hm~(-2)林分的枝下高、蓄积量和蓄积连年生长量均最大,分别为6.0 m、149.4 m~3·hm~(-2)和44.8 m~3·hm~(-2)·a~(-1),分别是密度625株·hm~(-2)林分的2.61、2.52、1.95倍。[结论]分析了造林密度对米老排初期生长的影响,对米老排人工林的培育具有理论指导意义。 相似文献
18.
Mingdong Ma Chengde Luo Hong Jiang Yuejian Liu Xi Li 《Frontiers of Forestry in China》2009,4(2):140-145
Biomass, carbon content, carbon storage and spatial distribution in the 32-year-old Phoebe bournei artificial forest were measured. The mean biomass of the forest stand was 174.33 t/hm2, among which the arbor layer was 166.73 t/hm2, which accounted for 95.6%. Carbon contents of stems, barks, branches, leaves, root, shrub layer, herb layer, lichen layer
and litter layer were 0.5769 g C/g, 0.4654 g C/g, 0.5232 g C/g, 0.4958 g C/g, 0.4931 g C/g, 0.4989 g C/g, 0.4733 g C/g, 0.4143
g C/g, 0.3882 g C/g, respectively. The mean carbon content of soil was 0.0139 g C/g, which reduced gradually along with soil
depth. Total carbon storage of the P. bournei stand ecosystem was 227.59 t/hm2, among which the arbor layer accounted for 40.13% (91.33 t/hm2), the shrub layer accounted for 0.17% (0.38 t/hm2), the herb layer accounted for 0.76% (1.71 t/hm2), the lichen layer accounted for 0.28% (0.63 t/hm2), and the litter layer accounted for 0.29% (0.66 t/hm2). Carbon content (0–80 cm) of the forest soil was 58.40% (132.88 t/hm2). Spatial distribution ranking of carbon storage was: soil layer (0–80 cm) > arbor layer > herb layer > litter layer > lichen
layer > shrub layer. Net production of the forest stand was 8.5706 t/(hm2·a), in which the arbor layer was 6.6691 t/(hm2·a), and it accounted for 77.82%. Net annual carbon sequestration of the P. bournei stand was 4.2536 t/(hm2·a), and the arbor layer was 3.5736 t/(hm2·a), which accounted for 84.01%.
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Translated from Scientia Silvae Sinicae, 2008, 44(3): 34–39 [译自: 林业科学] 相似文献
19.
Efficient nursery irrigation is a key factor for the production of high-quality forestry planting stock. Conventional timer-based irrigation systems used by most forestry nurseries have some drawbacks that, if not properly managed, can lead to over-irrigation and water wastage, leaching of nutrients and contribute to increased incidences of pests and/or diseases. A practical method to accurately measure media water content and control irrigation more carefully could prevent some of these issues. To evaluate the potential use of an automated irrigation system, commercially available Decagon EC-5 dielectric soil water content sensors were laboratory-calibrated against the gravimetric method using coir/pine bark/vermiculite, coir/perlite and pine bark media to measure water content of nursery seedling containers. Using Eucalyptus dunnii seedlings raised in polystyrene seedling containers to test the irrigation system, a datalogger was programmed to control irrigation for low (0.22–0.26 m3 m?3), medium (0.26–0.32 m3 m?3) and high (0.32–0.41 m3 m?3) watering treatments. The measurements were displayed in near real-time using a web-based system, which allowed for system checking and from which data could be downloaded. The Decagon EC-5 sensors were successfully calibrated for all media (R2 > 0.97) and provided a better estimation of media water content than the manufacturer-supplied calibration equation better-suited for soils. The automated irrigation system effectively maintained the specified media water content for E. dunnii seedlings. The high watering treatment seedlings had the highest growth rates, although this treatment also had increased leaching of nutrients. By contrast, the low watering treatment seedlings showed the lowest growth rates, although these seedlings seemed to be more robust and tolerant of water stress. This study showed that the automated irrigation system, based on measurements of the media water content, can be successfully used in scheduling irrigation for Eucalyptus seedlings, leading to potential water savings. 相似文献
20.
《Scandinavian Journal of Forest Research》2012,27(1-4):119-127
>Changes in carbon (C) after fire were measured in seven southern boreal upland forest stands during the five immediate post‐fire years and 23 years after the fire. Pre‐fire above‐ground C mass of the stands was estimated. Combustion losses were 19% of the pre‐fire above‐ground C mass (8.4 kg m?2), and an additional 4% of that C mass was lost in the following 3–4 years. After 23 years, neither C mass of understory (0.1 kg m?2) nor standing snags (0.3 kg m?2) differed from that estimated before the fire; tree C was less (2.4 vs. 6.0 kg C m?2), and forest floor (2.5 vs. 1.4 kg C m?2) and coarse woody debris (1.7 vs. 0.7 kg C m?2) C were higher. Above‐ground C mass was 84% of pre‐fire mass. There were no measured changes in surface soil C following the fire (2.9 kg C m?2). Total C mass, including surface soil, was 10.2 kg m?2 at 23 years or 91% of the estimated pre‐fire C. Although gross fluxes of C followed the fire, massive net losses of C did not occur either immediately or in the two decades after fire. Dynamics of C differed among the stands. Data from either a single stand or a chronosequence in space can lead to different conclusions than those derived from multiple stands through time. 相似文献