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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (2): 26-29.

• 林学 园艺 园林 • 上一篇    下一篇

华北落叶松和云杉幼苗生长对氮素浓度响应的差异

张芸香 李海波 郭晋平   

  • 收稿日期:2010-06-04 修回日期:2010-08-10 出版日期:2011-01-14 发布日期:2011-01-14
  • 基金资助:

    基于种间关系实验的华北落叶松云杉混交林营造基础研究

Differences in Response of Larix principis-rupprechtii and Picea Seedlings to Nitrogen Concentration

  • Received:2010-06-04 Revised:2010-08-10 Online:2011-01-14 Published:2011-01-14

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摘要：

为了全面掌握华北落叶松和云杉的生长对策差异，为混交林的经营管理提供理论依据。通过人工控制条件下的幼苗栽培试验，研究不同氮素浓度处理下2个树种的苗期生长表现，分析它们的高生长、地径生长、总生物量、生物量分配的不同变化。研究结果表明：华北落叶松和云杉苗期生长对氮素浓度变化都有显著差异，2个树种的响应趋势基本相似，对于氮素的利用也存在显著差异；华北落叶松苗期生长指标高于云杉，尤其以苗高和单株生物量更显著。因此，华北落叶松比云杉对微环境条件的异质性更敏感，在利用林地环境资源支撑其苗期生长的过程中更具有显著优势。

关键词: 地理信息系统, 地理信息系统, 黄土高原, 土壤侵蚀, 温度带

Abstract:

In order to master the difference in growth strategy of Larix principis-rupprechtii and Picea, and provide the theory basis for mixed forests management, with seedlings cultivation experiment under manual control conditions, this paper studied the growth performance in the seedling stage of 2 species under different nitrogen concentrations, and analyzed the differences of height growth, basal diameter growth, tatal biomass and biomass allocation. The results showed that: the growth in seedling stage of 2 species with variation of nitrogen concentrations had significant differences, the response tendency were similar, and the nitrogen utilization also had significant differences; the growth index in seedling stage of Larix principis-rupprechtii were higher than that of Picea, especially the height of seedling and single biomass. Therefore, Larix principi-rupprechtii was more sensitive to microenvironment heterogeneity and had distinct advantages in the growth of seedling stage supported by utilizing land environment resources than Picea.