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应用生态学报 ›› 1992, Vol. 3 ›› Issue (2): 105-110.

• 研究论文 • 上一篇    下一篇

杨树人工林生态系统立地质量因子的定量排序与评价

金志农   

  1. 江西省科学院生物资源研究所, 南昌 330029
  • 收稿日期:1990-10-22 出版日期:1992-04-25 发布日期:1992-04-25
  • 基金资助:

    国家“七五”攻关项目“黑杨派南方型无性系速生丰产技术的研究”的一部分。

Quantitative ordination and evaluation of site quality factors of poplar artificial forest ecosystem

Jin Zhinong   

  1. Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330029
  • Received:1990-10-22 Online:1992-04-25 Published:1992-04-25

摘要: 从系统论的观点出发,运用多元数理统计法,系统地辩识和评价了长江中游平原地区黑杨派南方型无性系(Ⅰ-69杨,Ⅰ-72杨)主要立地因子。结果表明,土壤有效水分是主要的综合立地因子,其对林分优势高生长的贡献率为44.56%(Ⅰ-69杨)和34.09%(Ⅰ-72杨);其次是物理性状和通气条件,各占24%左右;土壤养分贡献率最低,仅10%左右。主要立地子因子包括水淹程度、微地形、地下水位、经营程度、土壤质地、土壤结构和pH值,累积贡献率达到90%以上。文中最后编制了具有数量化立地指数表和地位级表双重功能的立地因子贡献值表。

关键词: 立地质量, 立地因子, 贡献率

Abstract: Major site factors of southern type clones of Aigeiros section were evaluated by multivariate statistical analysis method. The results show that soil availabe water is a major integrated site factor which affects the growth of two clones, its contribution percentage (CP)being44.56% and 34.00% for 1-69/55 and 1-72/58 respectively. The CPof soil physical properties and aeration condition is about 24%, and that of soil nutrient is 10%. The accumulated CPof major site subfaetors including flooding, microtopography, ground water level, management level, soil structure, soil texture, available Kand pHis more than90%. In the end of the paper, table of contribution value including those of site class and quantitative site index is worked out.

Key words: Site quality, Site factor, Contribution percentage