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| 南亚热带桉树林和针阔混交林土壤及凋落物持水能力比较 |
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陈伟光,张卫强,张卫华,唐洪辉,盘李军,冼杆标
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广东省佛山市云勇生态林养护中心,广东省林业科学研究院,广东省林业科学研究院,广东省林业科学研究院,广东省佛山市云勇生态林养护中心,广东省佛山市云勇生态林养护中心
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| 摘要: |
| 以桉树林（第2代和第1代）和杉木针阔混交林（10~11 a和5~7 a生）为研究对象，探讨南亚热带4种试验林0~100 cm土层土壤及凋落物持水能力。结果表明，在0～100 cm土层，针阔混交林土壤总孔隙度和毛管孔隙度均高于桉树林，而土壤非毛管孔隙度却显著低于桉树林（P<0.05），表明针阔混交林土壤中有效水的贮存容量高于桉树林。受土壤总孔隙度和毛管孔隙度的影响，针阔混交林土壤最大持水量和毛管持水量显著高于桉树林（P<0.05）。4种试验林田间持水量的差异不显著（P>0.05），说明4种试验林土壤保水能力基本一致。4种林分凋落物量表现为桉树林Ⅳ>桉树林Ⅱ>针阔混交林Ⅰ>针阔混交林Ⅲ，桉树林凋落物最大持水量、最大拦蓄量和有效拦蓄量显著高于针阔混交林（P<0.05）。 |
| 关键词: 桉树林 针阔混交林 土壤及凋落物持水能力 南亚热带 |
| DOI： |
| 分类号:S715.7 |
| 基金项目:林业公益性行业科研专项（201104003 04），广东省林业科技创新专项项目(2010KJCX013 02)，广东省佛山市农业局科技项目“佛山市生态景观林培育技术研究与推广示范”和国家林业局广东东江源森林生态站联合资助 |
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| Comparison on Water Holding Capacities of Soil and Litter of Eucalyptus Plantation and Conifer Broadleaved Mixed Forest in Southern Subtropical Region |
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CHENG Weiguang,ZHANG Weiqiang,ZHANG Weihua,TANG Honghui,PAN Lijun and XI Ganbiao
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Guangdong Academy of Forestry,Guangzhou,Guangdong Academy of Forestry,Guangzhou,Guangdong Academy of Forestry,Guangzhou,Maintenance Center for Yunyong Ecological Forest of Foshan,Maintenance Center for Yunyong Ecological Forest of Foshan
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| Abstract: |
| For understanding the water holding capacities of soil and litter of plantations in southern subtropical region, four kinds of stands were taken as the research objects. The stands included the first (Ⅳ) and second (Ⅱ) generation Eucalyptus plantations, as well as 10—11 (Ⅰ) and 5—7 (Ⅲ) years old conifer broadleaved mixed forests. The total porosity, capillary porosity of conifer broadleaved mixed forests were higher than those of Eucalyptus plantations, while non capillary porosity of conifer broadleaved mixed forests was lower than that of Eucalyptus plantations (P<0.05), and soil of Eucalyptus plantations showed the lower effective water storage capacity. The maximum water holding capacity and capillary water holding capacity of conifer broadleaved mixed forests were obviously higher than those of Eucalyptus plantation because of the effects of soil total porosity and capillary porosity. There were no significant differences of field water holding capacity among four kinds of stands (P>0.05), indicating the same soil water retention capacity. The water holding capacities of litter in four kinds of stands followed the order of Eucalyptus plantation (Ⅳ) > Eucalyptus plantation (Ⅱ) > conifer broadleaved mixed forest (Ⅰ)> conifer broadleaved mixed forest (Ⅲ). The maximum water holding capacity, maximum retain capacity and effective retain capacity of Eucalyptus plantations were obviously higher than those of conifer broadleaved mixed forests (P<0.05). The study provided scientific basis for tree selection, near natural transformation of stand, forest management and assessment of service function of forest ecosystem. |
| Key words: Eucalyptus plantation conifer broadleaved mixed forest water holding capacities of soil and litter southern subtropical region |
