| 摘要: |
| 【目的】确定秦岭南坡油松次生林合理抚育强度，为其生态经营和综合管理提供理论依据。【方法】以秦岭南坡油松林为研究对象，在旬阳坝、火地塘、新矿3个林场设置36块样地，并进行了弱度（5%）、中度（15%）和强度（25%）抚育，同时设置对照样地（未抚育），不同抚育强度样地各9块。间伐4年后，在全面分析不同抚育强度对林分结构、林分生产力、水源涵养及林下植被多样性影响的基础上，运用灰色局势决策理论进行单目标和多目标决策，确定合理的抚育强度。【结果】单目标决策表明，中度抚育在优化林分结构、提高林分生产力方面效果最佳；强度抚育在提高林分涵养水源能力与增加林分生物多样性方面效果最佳；与未抚育林分相比，弱度抚育效果不明显。多目标决策表明，秦岭南坡油松次生林的最佳抚育强度为中度抚育，其既能优化林分结构、减小林木个体竞争，又能提高林分生产力和稳定性，促进林分水源涵养能力和林内生物多样性稳步提高，效果优于强度抚育、弱度抚育和未抚育处理。【结论】秦岭南坡油松次生林的抚育强度应设置在15%为宜。 |
| 关键词: 油松 抚育强度 灰色局势决策 综合评价 |
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| 基金项目:林业公益性行业专项项目“秦岭天然次生公益林抚育经营关键技术研究”(201204502) |
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| Comprehensive evaluation and decision making of thinning intensity for Pinus tabulaeformis secondary forest on south slope of Qinling Mountains |
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CHANG Wei,DANG Kun-liang,WU Peng-hui,et al
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| Abstract: |
| 【Objective】This study determined proper thinning intensity of Pinus tabulaeformis secondary forest on south slope of Qinling Mountains to providing theoretical basis for ecological management.【Method】A total of 36 P.tabulaeformis plantation stands in Xunyangba,Huoditang and Xinkuang were selected and different thinning intensities including light,medium,heavy and control with the cutting ratios of 5%,15%,25% and 0% were conducted.Based on overall analyses of effects of thinning intensity on population structure,productivity,water conservation and species diversity of vegetation,single-target and multi-target decisions of different thinning intensities were conducted with grey situation decision theory 4 years after cutting.【Result】 Single-target decision indicated that medium thinning intensity had the most significant effect on optimizing the population structure and increasing the productivity,while heavy thinning intensity had the most significant effect on improving the water conservation and species diversity of vegetation.However,light thinning did not show positive effects compared with control group.Multi-target decision showed that medium thinning was the best for P.tabulaeformis secondary forest on south slope of Qinling Mountains.Thinning forest with medium intensity could optimize the population structure to decrease competition while increase the productivity,the stability of forest,the water conservation and species diversity of vegetation.【Conclusion】 15% thinning intensity was suggested for P.tabulaeformis secondary forest on south slope of Qinling Mountains. |
| Key words: Pinus tabulaeformis thinning intensity grey situation decision theory comprehensive evaluation |
