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COMPARATIVE ANALYSES ON THE LITTER IN KOREAN pine mongolian scots pine AND DAHURIAN LARCH PLANTATIONS(Ⅱ)CONTENT AND RETURNING AMOUNT OF NUTRIENT ELEMENTS

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Journal of Northeast Forestry University 1995年第1期6卷 12-17页

作者：王克张羽 Northeast Forestry University China

Comparative analyses were conducted on the nutrient element content and returning amount of main fractional compositions of litter in Korean pine (KP), mongolian scots pine(MSP) and Dahurian larch (DL) plantations in Laoshan Plantation Experiment Station of Maoershan Experiment Forest Farm of Northeast Forestry University. The results are as follows: (1) The nutrient element content and returning amount in litter varies among different fractional compositions and tree species, the total returning amount of all nutrient elements and the returning amount of K, Ca, Mg, N and P are DL>MSP>KP, the returning amount of Cu is DL>KP>MSP, the returning amount of Fe and Mn are MSP>DL>KP, (2) To KP and DL plantations, the main nutrient element returned is dead needles; dead branches, bark scales and dead cones account for a little proportion; whereas to MSP plantation, besides dead needles,dead branches and bark scales also play an important role in the return of nutrient elements; (3)A little deal of dead leaves can provided a great deal of returning amount of nutrient elements.

关键词： Korean pine mongolian scots pine Dahurian larch Plantation Litter,Nutrient elements Returning amount

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AN OBSERVATION OF FORMICA FUKAII WHEELER PREDATORY BEHAVIOR IN mongolian scots pine STANDS

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Journal of Northeast Forestry University 1991年第2期2卷 100-104页

作者： Hou AijuNortheast Forestry UniversityLou Wei Yan DunliangInstitute of Protective Forest of Heilongjiang ProvinceTian JinquanStation of the Prevention and Quarantine of Forest Diseases and Pest of Nehe County Northeast Forestry University China Institute of Protective Forest of Heilongjiang Province China Station of the Prevention and Quarantine of Forest Diseases and Pest of Nehe County China

The pine sawfly (Acantholyda posticalis Matsumura) is a serious pest of Pinus sylvestris; P. tabulaeformis and P. koraiensis. Chemical control has been generally applied, but caused a lot of problems. We first found Formica fukaii (new record in China). The ants nesting on Carex sp. preying on pine sawflics is an important predator. When nests are removed on purpose, the ant's behavior is normal and the nest are expanded. It is a dominant species and a natural enemy of pine sawfly in Nehe County.

关键词： Formica fukaii Control Acanlholyda posticalis mongolian scots pine Artificial removing

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Stand biomass of Pinus sylvestris var. mongolica plantations benefits from high density monocultures in the boreal zone

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Forest Ecosystems 2024年第5期11卷 650-658页

作者： Bingming Chen Shensi Liu Jinghua Yu Yanqing Huang Shuai Yu Huanchu Liu Tianyu Zhang Xiangdong Liu Guangze Jin Wei Chen Xingyuan He CAS Key Laboratory of Forest Ecology and Silviculture Institute of Applied EcologyChinese Academy of SciencesShenyang110016China University of Chinese Academy of Sciences Beijing100049China Shenyang Arboretum Chinese Academy of SciencesShenyang110016China Liaoning Shenyang Urban Ecosystem National Observation and Research Station Shenyang 110164China College of Forestry Shenyang Agricultural UniversityShenyang110866China Center for Ecological Research Northeast Forestry UniversityHarbin150040China Key Laboratory of Sustainable Forest Ecosystem Management Ministry of EducationNortheast Forestry UniversityHarbin150040China Northeast Asia Biodiversity Research Center Northeast Forestry UniversityHarbin150040China

Pinus sylvestris ***(***)plantations are extensively established in the boreal *** stand biomass of these plantations can effectively enhance carbon stock,which is crucial for mitigating climate ***,the current understanding of optimizing plantation strategies to maximize stand biomass is primarily derived from experiments in tropical and subtropical zones,which is difficult to extend to the boreal due to substantial climatic *** on a comprehensive dataset from 1,076 sample plots of *** plantations in the boreal zone of China,we evaluated the effects of tree species richness and stand density on tree height,diameter at breast height(DBH),and stand biomass to investigate the optimal plantation ***,we examined how these effects changed with stand age and investigated their relative *** found that monocultures at a high stand density of 2,000–2,500ha^(−1) were the optimal plantation strategy to maximize stand biomass(107.5Mg·ha^(−1)),and this held true at almost all stand ***,this strategy resulted in low species richness and small individual trees(10.6m height and 9.8cm DBH),thus presenting a *** addition,as stand age increased,the effect of tree species richness on stand biomass shifted from positive to negative,but the effect of stand density was always ***,stand age had the greatest effect on stand biomass,followed by stand density and then tree species *** findings reveal a distinct plantation strategy for optimizing stand biomass of *** plantations in the boreal *** importantly,this study highlights that(1)maximizing stand biomass in the boreal zone may compromise tree species richness;(2)net effects of tree species richness on stand biomass are not always positive,as negative selection effects offset positive complementary effects.

关键词： Boreal forests Cold region Forestry application mongolian scots pine Planting strategy Tree diversity

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INFLUENCE OF FIRE ON KOREAN pine AND scots pine TREES IN PLANTATION

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Journal of Northeast Forestry University 1993年第2期4卷 11-17页

作者： Liu HuirongNortheast Forestry University Northeast Forestry University China

The plantations of korean pine (Pinus koraensis) and scots pine (Pinus sylvesris var. mongolica) are mainly pure stands. Fires are gradually causing problems in these plantations and being paid much more attention recently. Study on the influence of fire on trees and the adaptation to fire, therefore, is of great important to probe the fire ecological properties and the protection ways of these two species. The results are as follows: Both of the species are easily damaged by fire, but korean pine is more susceptible. In the same fire, korean pine is damaged more seriously than scots pine although they have the same size. Young individuals have low fire resistant capacity and can be damaged seriously, and older ones have strong fire resistance and can be damaged lightly. Up-hill fire makes a serious damage to the trees distributed in up-slopes with the reason of higher fire intensity. Down -hill fire makes a serious damage to the trees distributed in down-slopes with the reason of higher fire severity. The larger deocambium area in the tree bark is, the earlier tree growth after fire is. During the early growth stage, the damaged tree bark will Spill over much resin. The height of running resin is higher than that of dead cambium. Damaged trees sprout and grow more slowly and the length of leaves are shorter than these normal trees. The chiorophyll content of serious damaged trees is much higher than that of normal trees. The chiorophyll content of dying trees is 64. 29% higher than that of the contrast ones. Cell membrance penetrability of damaged trees is also higher than that of normal trees.

关键词： Fire Korean pine mongolian scots pine Chlorophyll

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