| [effect of elevated co2 concentration on growth of dominant tree species in pine broadleaf forest of changbai mountain]. | potted saplings of pinus koraiensis, picea koraiensis, larix olgensis, populus ussuriensis, betula platyphylla, tilia amurensis, traxinus mandshurica, and acer mono, the eight dominant species in the korean pine broadleaf forest at changbai mountain, were grown in open-top chambers with ambient(400 microliters.l-1) and elevated (700 microliters.l-1) co2 concentration under natural sunlight for two growing seasons. the average height growth of these eight species under elevated co2 increased by 1 ... | 2000 | 11767520 |
| [simulation of potential responses of clear-cut of mixed coniferous and broadleaved korean pine forest in yichun to climate change by bkpf model]. | the potential responses of forest succession in the clear-cut site of mixed coniferous and broad-leaved korean pine forest (mcblkpf) in yichun, heilongjiang province to global climate change and elevated co2 after 50 years by bkpf model were simulated. the results indicated that the densities of pinus koraiensis and hardwood species(fraxinus mandshurica, tilia amurensis, juglans mandshurica and phellodendron amurense) would increase, while the densities of larix olgensis, betula platyphylla and ... | 2000 | 11767667 |
| [effect of elevated atmospheric co2 concentrations on photosynthesis light response characteristics of three coniferous tree species seedlings]. | potted seedlings of pinus koraiensis, picea koraiensis, and larix olgensis, the dominant coniferous tree species in changbai mountain, were grown under elevated co2 concentration (700 mumol.mol-1) and ambient co2 concentration (400 mumol.mol-1) for two year, and their photosynthesis light response curves were determined with ci-301ps co2 gas analysis system under a series of light intensity from 0 to 2500 mumol.quanta.m-2.s-1. the comparison of dark respiration rate (drr), maximum net photosynth ... | 2002 | 12216385 |
| [simulation of temporal-spatial variation characteristics of surface runoff in changbai mountain based on process model for landscape scale]. | the seasonal dynamics and spatial distribution characteristics of surface runoff in changbai mountain simulated by the process model (eppml), and the relationships between surface runoff and environmental conditions were analyzed. the results showed that the seasonal variation of surface runoff in changbai mountain presented obvious three-peak pattern, i.e., the lowest values in june and september, peak values in august (2.58 mm.d-1), similar to that of soil water content. total trend of surface ... | 2003 | 12924112 |
| [succession of larix olgensis and betula platyphlla-marsh ecotone communities in changbai mountain]. | the succession of communities within the ecotone between forest and marsh in changbai mountain was studied to identify the interrelation between the succession of ecotone communities and the mesophytization of the ecotone. the succession regime of the ecotone communities was studies by patch size (the volume of each mound) and age class of different tree species, water transmission from soil to atmosphere through the transpiration of different tree species, and regional climate warming and commu ... | 2003 | 14997623 |
| image analysis and coummunity monitoring on coniferous forest dynamics in changbai mountain. | the structure and dynamics of coniferous forests in changbai mountain were studied at different spatial scales, including ground survey of permanent plots and analysis of multitemporal satellite images. plot-scale examinations showed that the mortality rate was 7% - 9%, and the recruitment rate was 18% - 20% per 10 years. species composition changed over time. picea jezoensis var. microsperma, abies nephrolepis and betula ermanii presented a self-maintaining capability, because they could regene ... | 2004 | 15506080 |
| [studies on chemical constituents in bark of larix olgensis var. koreana]. | to study the chemical constituents in bark of larix olgensis var. koreana. | 2005 | 15724403 |
| [relationship between tree-ring chronology of larix olgensis in changbai mountains and the climate change]. | the relationship of larch (larix olgensis) radial growth in changbai mountains with climate change was assessed by dendrochronological techniques including correlation functions and single-years analysis. the results showed that larch growth was sensitive to environmental change, and temperature was the primary factor affecting larch growth. the larch growing in high and low elevations had a significantly different response to temperature. in high elevation, larch growth was significant correlat ... | 2005 | 15852949 |
| lignans from bark of larix olgensis var. koreana. | six new lignans (2-7) were isolated from the bark of larix olgensis var. koreana, and their structures were determined on the basis of their spectroscopic data. seven known lignans were also obtained and identified as (+)-lariciresinol 9'-p-coumarate (1), (+)-lariciresinol, (-)-secoisolariciresinol, (+)-isolariciresinol, vladinol d, sesquipinsapol b, and ehletianol c. compound 1 showed weak inhibition against k562, shg44, hct-8, a549, and pc-3m tumor cells with ic50 values of 2.9, 21.4, 32.9, 33 ... | 2005 | 16124756 |
| [effects of bryophytes in dark coniferous forest of changbai mountains on three conifers seed germination and seedling growth]. | this paper studied the effects of hylocomium splendens and rhytidiadelphus triquetrus, the main bryophytes in dark coniferous forests of changbai mountains, on the seed germination and seedling growth of pinus koraiensis, picea koraiensis and larix olgensis. the results indicated that at definite concentrations, the water extract of h. splendens inhibited picea koraiensis seed germination, while that of r. triquetrus promoted it. although the water extracts of the two bryophytes had no obvious e ... | 2006 | 17066691 |
| assessing the potential of native tree species for carbon sequestration forestry in northeast china. | although the native forests of china are exceptionally diverse, only a small number of tree species have been widely utilized in forest plantations and reforestation efforts. we used dendrochronological sampling methods to assess the potential growth and carbon sequestration of native tree species in jilin province, northeast china. trees were sampled in and near the changbaishan biosphere reserve, with samples encompassing old-growth, disturbed forest, and plantations. to approximate conditions ... | 2007 | 17188419 |
| [obstacles for natural regeneration of larix olgensis plantations in montane regions of eastern liaoning province, china]. | based on the field investigations about the seed bank, seed germination, seedling emergence, and seedling survival and growth in the larix olgensis plantations with different thinning intensities and various ground preparations in the montane regions of eastern liaoning province, the main factors affecting the natural regeneration of l. olgensis were analyzed in this paper. the results showed that in the seed rain of 40 years old l. olgensis plantation, 30% of the seeds had viability, which coul ... | 2008 | 18593024 |
| [genetic variability and differentiation in the larch populations within the range of larix olgensis a. henry in primor'e region]. | the level of within- and among-population variation of larch inhabiting the range of larix olgensis a. henry in primorye was estimated on the basis of 440 rapd loci identified by means of 12 random primers. in ten population examined, the proportion of polymorphic loci was 35-60%, the average expected heterozygosity varied from 0.1340 to 2169, and the average gene flow estimate was 1.38. according to fisher's test for heterogeneity, the pairwise differences of the fragment frequencies between th ... | 2008 | 18664142 |
| [application of 3d visualization software in forest ecosystem management in eastern liaoning mountainous region]. | by using 3d visualization software wcs 6.0, the virtual forest landscape of pulepu town in eastern liaoning mountainous region was constructed, and the dynamic changes of forests under four different management scenarios, i.e., enclosing undeveloped forest, small area clear-cutting, selective-logging, and two-step progressive logging, were modeled. the results showed that under enclosure, 10-30 years old larix olgensis var. changpaiensis grew faster (ca. 0.6 m x a(-1)), while 10-30 years old que ... | 2008 | 18839900 |
| [carbon storage maturity age of larix olgenisis and l. kaempferi]. | the successive years and average increments of the volumes of larix olgensis and l. kaempferi were computed by trunk analysis, and the carbon content and carbon density of l. olgensis and l. kaempferi at their different age stages were measured with germany vario el iii element analyzer, aimed to approach the carbon storage maturity age of the two tree species. the results indicated that l. olgensis and l. kaempferi had a volume maturity age of 48.3 and 49.3 years, respectively, and the change t ... | 2008 | 19288704 |
| [simulation of above ground biomass in larix olgensis plantation]. | by the method of harvesting sampling trees, the information of aboveground biomass in 34 plots of a larix olgensis plantation were collected, of which, the information from 29 plots was selected and fitted with stand factors and tm image rs factors, respectively to establish biomass models, and the information from the rest 5 plots was used to verify the models accuracy. the aboveground biomass in the larix olgensis plantation could be linearly fitted with either stand factors or rs factors. for ... | 2010 | 20873606 |
| [larch chromosomal mosaicism]. | karyological study of larch population members from different parts of the larix olgensis l. henry areal in the primorskii krai has been carried out. the main amount of chromosomes for larch as n = 12 (2n = 24) has been confirmed. mixoploidy was observed in all studied populations. the difference of individuals from the larch areal based on the cell amount with a different level of ploidity has been found in the population of l. olgensis locus classicus and both l. sibirica and l. gmelinii, whic ... | 2010 | 21268865 |
| [Soil nutrient status of pure birch and larch plantations based on their seedlings bioassay]. | One-year-old birch (Betula platyphylla) and larch (Larix olgensis) seedlings were respectively planted in pots with the soils taken from 35-year-old pure birch and larch plantations, and the seedlings growth, biomass increment, foliar nutrient content, and soil nutrient status were monitored, aimed to evaluate the fertility levels of the two soils and the possible interspecific interaction in mixed larch-birch forest. Birch soil had significantly higher contents of total N and available N than l ... | 2011 | 22097360 |
| [Effects of controlled-release fertilizer and organic amendment on the construction of nutrients reserves in Larix olgensis container seedlings]. | A 2 x 2 factorial experiment was conducted to study the effect of fertilization on Larix olgensis container seedlings. 36.36 or 18.18 mg controlled-release fertilizer (CRF) N and 0 or 1.82 g FM organic amendment (OA) per seedling were applied. There were no significant responses to fertilization in the seedling height, collar diameter, biomass, and potassium (K) uptake. Applying FM OA increased the number of first-order lateral roots with a length > 1 cm (P = 0.040), the tap root length (TRL) (P ... | 2011 | 22007448 |
| [interspecific allelopathic effect of different organs' aqueous extracts of betula platyphylla and larix olgensis on their seed germination and seedling growth]. | in this paper, the betula platyphylla root-, branch-, and foliage aqueous extracts and larix olgensis root-, branch-, foliage-, and bark aqueous extracts over a range of concentrations 5.0, 12.5, 25.0, 50.0, and 100.0 mg x ml(-1) were used to study their interspecific allelopathic effect on the seed germination and seedling growth of the two tree species. all the l. olgensis organs' extracts, except its root extracts at concentration 5.0 mg x ml(-1), had inhibition effect on b. platyphylla seed ... | 2011 | 22384579 |