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1.
Fallen wood decomposition rate ofPinus koraiensis andTilia amurensis in broadleaved Korean pine forest was studied in this paper. The result showed that decomposition rate of fallen wood was
different from that of little diameter wood and coarse woody debris for the same tree species. Fallen wood decomposition was
generally rotten from outside to inside. And decomposition speed of fallen woods was different according to tree species and
site, and it was also related to diameter of fallen woods. Decomposition depth ofTilia amurensis fallen wood for 17 years was 14 cm, but that ofPinus koraiensis in the same condition was less than 7 cm.Tilia amurensis was decomposed faster thanPinus koraiensis. For same tree species, if the diameter was small, the decomposition speed was quick.
This project was supported by Natural Science Foundation of China (No. 39670144) and funded by the Opened Research Station
of Changhai Mountain Forest Ecosystem, Chinese Academy of Sciences.
(Responsible editor: Zhu Hong) 相似文献
2.
By investigation, studying and discussion for 9 years, the determination that it should bePinus sibirica growing in the Mohc county, Daxing’anling Mountains area, China, rather thanpinus koraiensis there, is made to correct a false argument in some works from 1950s’ till now thatPinus koraiensis area limit reach Daxing’anling Mountain. The results are as follows: (1) The species so called asPinus koraiensis found in northwest of Daxing’anling Mountain isPinus Sibirica indeed; There are no natural distribution ofPinus Koraiensis in Daxing’anling Mountain. Its northwest area limit only reach Shengshan, Aihui county; (3) There is about 500km of space
between the area limits ofPinus koraiensis and that ofPinus sibirica, no mixed growing area. According to above, a sketch map is made to describe different area limit of the two species at Daxing’anling
Mountain and nearby. 相似文献
3.
Each link in initial process of artificial regeneration ofPinus koraiensis in clear cutting site was researched. The seedling recovery processes after transplantation, the affecting seedlings survival
factors in different time, and the characters of seedling growth were analyzed. Results of this study suggest that the root
recovery of Korean pine seedlings after transplanting is the key link in the artificial regeneration management. The synthetically
management was proposed on basis of seedling root recovery process.
The project was surpported by Natural Science Fund of Heilongjiang Province 相似文献
4.
IntroductionWoodisveryimportantfinaIproductinforestman-agement,andimprovingwoodproductandquaIityarecommongoaIinmostbreedingsystems.EarlyselectionfortreegrowthnotonIyprovideexceIIentnurserystorematerialforplantinghighyieIdforest,butaIsopossibIyimproveselec… 相似文献
5.
The net CO2 assimilation rate, stomatal conductance, RuBPcase (ribulose 1,5-biphosphate carboxylose) activity, dry weight of aboveground
and belowgroud part, plant height, the length and diameter of taproot ofPinus koraiensis seedlings were measured and analyzed after six-week exposure to elevated CO2 in an open-top chamber in Changbai Mountain of China from May to Oct. 1999. Seedlings were planted in four different conditions:
on an open site, control chamber, 500 μL·L−1 and 700 μL·L−1 CO2 chambers. The results showed that the total biomass of the seedlings increased whereas stomatal conductance decreased. The
physiological responses and growth to 500 μL·L−1 and 700 μL·L−1 CO2 varied greatly. The acclimation of photosynthesis was downward to 700 μL·L−1 CO2 but upward to 500 μL·L−1 CO2. The RuBPcase activity, chlorophyll and soluble sugar contents of the seedlings grown at 500 μL·L−1 CO2 were higher than that at 700 μL·L−1 CO2. The concentration 500 μL·L−1 CO2 enhanced the growth of aboveground part whereas 700 μL·L−1 CO2 allocated more carbon to belowground part. Elevated CO2 changed the carbon distribution pattern. The ecophysiological responses were significantly different between plants grown
under 500 μL·L−1 CO2 and 700 μL·L−1 CO2.
Foundation Item: This paper was supported by Chinese Academy of Sciences.
Biography: HAN Shi-jie (1956-), male, Ph. Doctor, Professor in Laboratory of Ecological Process of Trace Substance in Terrestrial Ecosystem,
Institute of Applied Ecology, Chinese Academy of Sciences.
Responsible editor: Chai Ruihai 相似文献
6.
Guan Weijun 《林业研究》1993,4(1):69-72
Through the polyacrylamide gel electrophoresis analysis of thirty-two needle samples of ninty-years oldpinus koraiensis in Harbin, seven typies of zone and distribution of the zone frequency, and some objective fact of heredity and variation
were determined. These informations can be used as reference materials in the research of heredity and variation ofpinus koraiensis. 相似文献
7.
Two new diterpenoid acids were obtained from the traditional Chinese medicinal herb Pinus koraiensis. By spectral evidence, the structure of the new compounds were elucidated as 7-oxo-13beta,15-dihydroxyabiet-8(14)-en-18-oic acid (1) and 7-oxo-12alpha, 13beta,15-trihydroxyabiet-8(14)-en-18-oic acid (2), respectively. 相似文献
8.
Trap bags were used to assess the presence of anArmillaria species in aPinus koraiensis plantation in Heilongjiang, China. 216 trap bags containing bark were placed in three plots at 2 × 2m spacing. After 10 weeks,
the presence ofArmillaria was determined from the growth of rhizomorphs in the trap bags. The trap bag method proved successful in determining the
presence of viableArmillaria rhizomorphs where only a few dead trees showed signs of the disease. The distribution of positive traps corresponded generally
with the presence of rhizomorphs in the soil taken from the trap holes. However, the trap bags were superior to soil samples
for evaluating the presence of viable rhizomorphs. The fresh, abundant rhizomorphs were easily identified by persons inexperienced
in the assessmentof Armillaria root rot. Several practical problems need to be solved before the method is applicable in general forest management in China. 相似文献
9.
Microenvironmental heterogeneity of soil physical properties in 0–20 cm and 20–40 cm soil layers in a broad-leaved Pinus koraiensis forest gap in Xiao Xing’anling Mountains were analyzed by geostatistical method. The results show that the amount of soil
water, saturation water capacity, capillary water capacity and porosity in the top layer were greater than those in the lower
layer, except for bulk density, where the opposite applied. Soil physical properties in the top soil layer had relatively
higher ranges and coefficients of variation. The total and auto correlation spatial heterogeneity of soil physical properties
in the top layer were larger than those in the lower layer. The soil water had a strong anisotropic structure in an easterly
and northerly direction, but porosity shows isotropy in the same directions. With increasing spatial distance, the other three
physical factors exhibited anisotropic structures. The mutual effect between semi-variograms of soil physical properties in
the top layer within the spatial autocorrelation range was not significant. For spatial distribution of physical properties
within different layers, the patches at the middle and lower ranks in the forest gap dominated. Patches at higher rank were
only distributed in the 0–20 cm soil layer and were located north of the forest gap center.
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Translated from Science of Soil and Water Conservation, 2007, 5(3): 52–58 [译自: 中国水土保持科学] 相似文献
10.
11.
A virgin Pinus koraiensis forest in the Xiaoxing’an Mountains was selected to study its rainfall redistribution effect via 97 rainfall occurrences
during a growing season. The following results were obtained: 1) The canopy interception of the P. koraiensis virgin forest amounted to 98168 mm during a growing season (May to September), which was 19.6 per cent of the total rainfall
and 1.3 times that of a secondary Betula platyphylla forest. Compared with other forest types in China (11.4%–36.5%), the ratio of the canopy interception in the virgin pine
forest was at a medium level. 2) The throughfall of the virgin pine forest was 395.77 mm, which accounted for 78.7% of total
precipitation, and the stem-flow was 8.78 mm, accounting for 1.74% of total precipitation. Compared with the secondary birch
forest, the virgin pine forest had lower throughfall but higher stem-flow. 3) Cubic regression equations (p < 0.01) which describe the relation between throughfall, stem-flow and canopy interception in the virgin pine forest and
rainfall in an open field were fitted. A linear regression equation (p < 0.01) was found to be a better fit for the relationship between throughfall of the secondary birch forest and rainfall
outside the forest. Factors affecting throughfall and stem-flow were analyzed, with results providing a good reference to
the study of rainfall redistribution in coniferous and broadleaved mixed forests.
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Translated from Science of Soil and Water Conservation, 2006, 4(6): 61–65 [译自: 中国水土保持科学] 相似文献
12.
The cutting propagation technique ofPicea koraiensis was carried under automatic spraying of total sunlight by adopting the same year epicormic branches from different trees
with different age treated by different hormones in different concentration and time and the orthogonal and randomized block
was designed. The results were as follows: (l)The rooting rate of the cutting reached at least 87 percent, when the cuttings
were from the seed tree with the age below 25 years old and the cuts of the cuttings base were in vertical angle and on the
fine sand medium. (2) The sequence of effective factors affecting the rooting rate were the style of cut, the age of seed
tree and the type of medium. (3) There are significant differences of rooting rate among different clones. 相似文献
13.
Wang Yingli 《林业研究》1994,5(3):13-20
This paper summarizes the result from the provenance test of eight years oldPinus sylvestris var.mongolica in Liangshui Natural Reserve comprehensively. The main contents include:(l) the geographic variation of the growth characters
ofPinus sylvestris var. mongolica, tends to negative change gradually at latitude and has obvious climatic nature, (2) no significant difference
exists in the morphological adaptability and resistant characteristics and so on; (3)on the basis of the geographic variation
study on the growth characteristics, the provenances ofPinus sylvestris var.mongolica were classified into two geographic populations and two subpopulations as follows: the northern population of the Daxing’an
Mountain (I) and the southern population of the Daxing’an Mountain as well as the Xiaoxing’an Mountain (II), which includes
Honghuarji subpopulation (II -1) and Kalunshan subpopulation (II-2). (4) the height growth rhythm was analyzed according to
the divided population and subpopulation; (5) the best provenance was selected for the Liangshui Natural Reserve and its neighborhood
according to the results from SSR test of the growth characteristics (the breast height diameter and height of eight year
old trees), the possibility of the early provenance selection was also verified by the method of order correlation analysis
on the height growth of three, five, seven and eight years old provenances. 相似文献
14.
抚育间伐对人工红松林生长效应的影响 总被引:2,自引:0,他引:2
利用不同间伐强度后40 a的人工红松林,连续抚育3次的长期定位观测资料,分析了抚育间伐对人工红松单木胸径和材积、林分断面积和蓄积、林分枯损和总收获量的影响。研究结果表明:间伐可以增加单木平均胸径和材积的生长率,且不同间伐强度表现为相同的规律,即中度(33.2%)强度(43.4%)弱度(23.1%)对照(0.0%);间伐后林分的断面积和蓄积生长率,具有相似的自然规律,间伐样地的生长率均高于对照;林木枯损率随间伐强度的增加而降低;间伐后的林分总收获量平均增加11.6%,间伐林分之间差别不明显。在整个研究阶段,不同的抚育阶段表现不同的规律,抚育间伐可以延缓单木胸径和材积生长速度的降幅;而不同抚育阶段内,林分断面积和蓄积生长率均为增长,也就是说,在一定阶段内间伐可以有效地提高林分平均断面积和蓄积生长率;从林分枯损状况来看,应该减少间伐间隔期。 相似文献
15.
The species composition and diversities, and soil properties under canopy gaps in broad-leaved Pinus koraiensis forests were studied in the Changbai Mountains. The results indicated that the species composition and diversities in gap
were different from those under canopy. The Shannon-Wiener index, evenness index, and abundance index in gap were higher than
those under canopy in the seedling layer, while the community dominance in the seedling layer increased in closed canopy.
The physicochemical properties of soil changed with the change of space and resource availability in gaps. The thickness,
standing crop, and water holding capacity of the litter layer under canopy were significantly (p<0.01) higher than those in gap. The content of total nitrogen and total potassium of litter in gap were 10.47% and 20.73%
higher than those under canopy, however, the content of total phosphorus and organic carbon under canopy were 15.23% and 12.66%
more than those under canopy. The water content of 0–10 cm and 10–20 cm of soil layer in gap were 17.65% and 16.17% more than
those under canopy. The soil buck density of 0–10 cm were slightly higher under canopy than that in gaps, but there was no
significant difference in the soil buck density of the 10–20 cm soil layer. The soil pH values were 5.80 and 5.85 in gap and
under canopy, respectively, and were not significantly different. The content of soil organic matter, total nitrogen, and
total potassium in gap were 12.85%, 7.67%, and 2.38% higher than those under canopy. The content of NH4
+-N, available phosphorus, available potassium, and total phosphorus in soil under canopy were 13.33%, 20.04%, 16.52%, and
4.30% higher than those in gap.
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Translated from Forest Research, 2006, 19(3): 347–352 [译自: 林业科学研究] 相似文献
16.
The changes of fractal dimension ofPicea koraiensis seedlings under different light intensities in natural secondary forests was studied. The results showed that with the change
of light environment, crown characters ofPicea koraiensis seedlings exhibited a greater plastic in lateral number, lateral increment, lateral dry weight, and specific leaf area. The
range of calculated fractal dimensions of seedling crowns was confined between 2.5728 and 2.1036, but maximum of fractal dimension
achieved in term moderate shading and in extreme low light conditions fractal dimension was least.
Foundation item: This paper was supported by the National Natural Science Foundation of China (No.39670152) and Chinese Academy of Sciences.
Biography: ZHOU Yong-bin (1970-), female, Ph. Doctor, lecture in Shenyang Agricultural University, Shenyang 110161, P.R. China
Responsible editor: Song Funan 相似文献
17.
Tracheid characteristics ofPicea koraiensis from natural stand in Liangshui area and plantation in Mao'ershan area were studied. The results of variance analysis showed
that the tracheid length, diameter, and thickness of tracheid wall were significant differences between the growth rings.
All those characteristics tend to increase from heart-center to bark. In natural stand, it has positive correlation between
the characteristics. In plantation, the tracheid length has positive correlation with the trachied diameter, while both the
trachied length and the trachied diameter has negative correlation with the thickness of trachied wall. The tracheid length
and diameter have no significant difference in growth between natural stand and plantations. The thickness of tracheid wall
from the plantation is a little thicker than that from the natural stand before 15 years.
Foundation item: This paper was part of State 9th Five-Year Plan project of “Early Mensuration ofPicea koraiensis (nakai)”.
Biography: REN Xu-qin (1973-), female, graduate student in Northeast Forestry University, Harbin 150040, P. R. China.
Responsible editor: Song Funan 相似文献
18.
Changbai pine (Pinus sylvestris var.Sylvestriformis) is an endemic and important tree species in Changbai Mountain. There were only 63 plant species in Changbai pine plantation,
where hemicryptophyte was dominant(39.68%). Simpson diversity index was 0.87, Shannon-Wiener diversity index was 2.96, and
evenness index was 0.82. Community structure were divided into three layers: tree layer, shrub layer and herb layer. The total
biomass and net production were 111.982 t/hm2 and 8942.80 kg/(hm2 a) respectively. The total biomass for tree, shrub and herb layers were 106.150, 2.230, 2.264 t/hm2, accounting for 94.79%, 1.99%, and 2.02%, respectively, and net production for those were 7465, 223, and 1182 kg/(hm2 a), accounting for 83.47%, 2.49%, and 13.22% of the total respectively. The nutrient content in various organs is in the
order of needle> branch> root> bark> trunk, For the assimilated organ, the nutrient content is in the order of N> K> Ca> P>
Mg, and that in absorption organ is in the order of Ca> N> K> P> Mg. For the whole plantation ecosystem, nutrient content
is in the order of soil> litter> herb layer> shrub layer> tree layer. Nutrient storage and its accumulation rate in tree layer
take up 88.79% and 76.43% of the total, respectively.
The project is funded by the Opened Research Station of Changbai Mountain Forest Ecosystems, Chinese Academy of Sciences
Responsible Editor: Chai Ruihai 相似文献
19.
The Mn, Zn and Cu contents of litter, soil fauna and soil in Pinus koraiensis and mixed broad-leaved forest in Liangshui Nature Reserve of Xiaoxing’an Mountains were analyzed in this paper, results showed
that the tested microelement contents in the litter, soil fauna and soil followed the order: Mn>Zn>Cu, but varied with environmental
components, for Mn the order is soil>litter>soil fauna, for Zn is soil fauna>litter and soil, and for Cu is soil fauna>soil>litter.
The change range of the tested microelement contents in litter was larger in broad-leaved forest than those in coniferous
forest. Different soil fauna differed in their microelementenrichment capability, the highest content of Mn, Zn and Cu existed
in earthworm, centipede and diplopod, respectively. The contents of the tested microelements in soil fauna had significant
correlations with their environmental background values, litter decomposition rate, food habit of soil fauna, and its absorbing
selectively and enrichment to microelements. The microelements contained in 5–20 cm soil horizon were more than those in 0–5
cm humus layer, and their dynamics differed in various horizons.
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Translated from Chinese Journal of Applied Ecology, 2007, 18(2): 277–282 [译自: 应用生态学报] 相似文献
20.
The biomass and net primary production of Mongolian scotch pine (Pinus sylvestris L. var.mongolica) plantations of west Kerqin sandy land were measured. According to average standard trees, the biomass, net primary production
and their distributions of trunk, bark, branch, leaf and root of 16-year-old stand were analyzed. The regressive equation
for the estimation of each organ biomass was established through dimensional analysis. Preferable equation with higher precision
was selected. The study results showed that the total biomass of the forest community was 62.023 t/hm2 and net primary production was 5.045 t/(hm2·a), which indicates that the community of plantation possesses high bio-productivity.
(Responsible Editor: Chai Ruihai) 相似文献