| 摘要: |
| 为探究不同比例桉树 Eucalyptus—红锥 Castanopsis hystrix 混交林林分生长和林地质量间伐后
变化, 以不
的
同混交比例桉树—红锥混交林和桉树纯林为研究对象, 采用对比分析和方差分析方法探讨间
伐前和间伐后不同比例桉树—红锥混交林林分生长和林地肥力变化。 结果表明: (1) 桉树—红锥 1 ∶ 1 混
交林间伐 50%强度桉树后能显著促进桉树—红锥混交林林分中桉树胸径和单株材积生长 (2) 桉树-红锥
1 ∶ 1、 3 ∶ 1 混交林间伐 50%强度桉树后能增加桉树和红锥蓄积, 桉树—红锥 5 ∶ 1、 3 ∶ 3 混交林间伐 50%
强度桉树后能增加红锥蓄积; (3) 桉树—红锥 1 ∶ 1 混交林间伐 50%强度桉树后土壤毛管孔隙度和 pH 明
显降低, 桉树—红锥 3 ∶ 1 混交林间伐 50%强度桉树后碱解氮含量降低最明显, 有效磷含量增幅最大, 桉
树—红锥 5 ∶ 1 混交林间伐 50%强度桉树后有机碳和速效钾含量增幅最高, 桉树—红锥 3 ∶ 3 混交林间伐
50%强度桉树后土壤容重增幅最大, 有机碳含量略有增加, 有效磷含量明显降低。 混交比例和间伐是影响
林木生长的主要经营模式, 根据造林目的和营林需求综合确定经营模式是精准提升桉树—红锥混交林经
济和生态效益的关键。 |
| 关键词: 经营模式 抚育间伐 林分生长 土壤肥力 |
| DOI： |
| 分类号: |
| 基金项目:国家重点研发计划项目 (2016YFD0600505), 广东省科技创新项目 (2024KJCX018) |
|
| Analysis of Stand Growth and Soil Fertility in Mixed Eucalyptus-Castanopsis hystrix Plantations |
|
MA Anqi1, DENG Haiyan2, ZHU Qi1, SHEN Linlin1, DING Xiaogang3, MO Xiaoyong1
|
|
1.South China Agricultural University;2.Guangdong Provincial Institute of Forestry Survey and Planning;3.Guangdong Academy of Forestry
|
| Abstract: |
| In order to investigate the changes in the stand growth and the stand quality on different mi
ratios of Eucalyptus-Cas
xed
tanopsis hystrix mixed plantations after thinning, this paper took different mixed ratios
of mixed Eucalyptus-C. hystrix plantations and pure Eucalyptus plantations as the research objects and used the
methods of comparison and variance analysis to investigate the changes in the growth of different mixed ratios of
mixed Eucalyptus-C. hystrix plantations and the soil fertility of the plantations and before and after the thinning. The results showed that: (1) M1 pattern could significantly promote the growth on diameter at breast height and
individual volume of Eucalyptus in Eucalyptus-C. hystrix mixed plantations followed by M4 pattern; (2) M1
and M2 patterns could increase the volume per unit area of both Eucalyptus and C. hystrix, and M3 and M4 patterns could only increase C. hystrix volume per unit area; (3) After thinning, the capillary porosity and pH of
the soil in M1 pattern decreased the most, the alkali-hydrolyzed nitrogen content decreased the most and the available phosphorus content increased the most in M2 pattern, the organic carbon and available potassium contents increased the most, and the alkali-hydrolyzed nitrogen content decreased the least in M3 pattern, in M4
pattern the soil bulk weight increased the most, the organic carbon content increased the least, and the available
phosphorus content decreased the most. Both mixed ratio and thinning are the main management modes affecting
the growth of plantation trees. Comprehensively determining the management modes according to the purpose of
afforestation and the needs of plantation management is the key to accurately improving the economic and ecological benefits of Eucalyptus-C. hystrix mixed plantation. |
| Key words: management mode nursery thinning stand growth soil fertility |
