| 油松—白桦混交林种间关系研究 |
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| 引用本文： | 聂道平,沈国舫.油松—白桦混交林种间关系研究[J].林业科学,1997,33(5):394-402. |
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| 作者姓名： | 聂道平 沈国舫 |
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| 作者单位： | 中国林业科学研究院森林生态环境研究所，北京林业大学 |
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| 摘 要： | 在调查河北隆化县油松－白烨混交林的林木生物量（地上部生物量及根系生物量）、林下草灌木、林地枯落物的总量以及不同混交距离油松地上地下部分生长发育状态的基础上，研究了混交林的种间关系。结果表明，该混交林作为华北地区广泛分布的一种林型，林下草灌木繁茂，林地枯落物分解迅速，有利于土壤理化性质和林分营养状况的改善，种间关系处于基本协调状态。由于林龄及密度原因，混交林生物量略低于油松纯林，在混交林中白桦对油松的生长有一定的抑制作用，抑制作用因混交距离而变化。本文提出了合适的混交距离和混交方式。
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| 关 键 词： | 油松，白桦，混交林，生物量，混交距离 |
STUDIES ON THE SPECIES RELATIONS IN THE MIXEDFORESTS OF PINUS TABULAEFORMIS CARR. AND BETULA PLATYPHYLLA SUK |
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| Nie Daoping Wang Bing.STUDIES ON THE SPECIES RELATIONS IN THE MIXEDFORESTS OF PINUS TABULAEFORMIS CARR. AND BETULA PLATYPHYLLA SUK[J].Scientia Silvae Sinicae,1997,33(5):394-402. |
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| Authors: | Nie Daoping Wang Bing |
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| Abstract: | The species relations were studied by comparing the biomass of tree, root system, vegetation under tree crown, forest floor in the mixed forests with that in the pure forests. The effects of different mixed spacing, on the growth or pine trees were observed in the mixed forests in Longhua County, Hebei Province. The results showed that the relations of two tree species in the mixed forests were basically in harmom state in spite of the existence of restraining role of Betula trees on the growth of pine trees when the mixed distance was less than 250cm. The vegetation biomass under tree crown in the mixed forest stands was much more than that in the pure pine stands, while litter accumulation was less in the mixed stands than in the pure pine stands because of high decomposition rate of litter in the mixed stands. These factors benefit the improvement of physical and chemical propeties of soil as well as stand nutrition state. The paper suggests that the mixed forest should he planted in the model of group mixture and the distances of two species should be larger than 250cm. |
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| Keywords: | Pinus tabulaeformis Carr Betula platyphylla Suk Mixed forest Biomass Mixing dislance |
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