沈阳城市和城郊油松凋落叶的分解动态

生态学杂志 ›› 2012, Vol. 31 ›› Issue (06): 1397-1403.

沈阳城市和城郊油松凋落叶的分解动态

郭芳琴^1,2,何兴元¹,陈玮^1**,黄彦青¹

（¹森林与土壤生态国家重点实验室，中国科学院沈阳应用生态研究所，沈阳 110164； ²中国科学院研究生院, 北京100049)

出版日期:2012-06-09 发布日期:2012-06-09

Decomposition dynamics of Pinus tabulaeformis leaf litter at urban and suburban sites of Shenyang, Northeast China.

GUO Fang-qin^1,2, HE Xing-yuan¹, CHEN Wei^1**, HUANG Yan-qing¹

(¹State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China; ²Graduate University of Chinese Academy of Sciences, Beijing 100049, China)

Online:2012-06-09 Published:2012-06-09

摘要/Abstract

摘要： 为了检测分解地点和凋落物类型对分解的影响，采用交互分解实验分析了油松凋落叶在城市林分和城郊林分中分解时不同立地条件（城市和城郊）以及不同油松凋落叶类型（城市油松凋落物和城郊油松凋落物）对凋落物的分解速率以及N、P残留率的相对作用。结果表明：不同的立地条件对油松凋落叶分解速率有显著影响(P<0.05)：城郊林分中的油松凋落叶比城市林分中分解快，说明外在环境条件对分解的影响显著；在同一林分里，凋落物类型对凋落叶分解速率也有显著影响(P<0.05)：城市凋落物分解快于城郊凋落物，说明凋落物内在特性对分解的影响显著。分解地点对于N、P残留率没有显著的影响，然而凋落物类型对N、P残留率有显著影响：城郊凋落物由于具有较高的C/N以及C/P初始值，比城市凋落物更容易富集N、P。

关键词: 冷激, 高温胁迫, 番茄幼苗, 生物膜保护系统, 小分子热激蛋白

Abstract: To examine the effects of site location and litter type on litter decomposition, a reciprocal decomposition experiment was conducted to study the effects of contrasting sites (urban vs. suburban) and leaf litter types (urban leaf litter vs. suburban leaf litter) on the mass loss rate and N- and P remaining percentages of Pinus tabulaeformis leaf litters when decomposing in urban stand and suburban stand, respectively. The one year experiment showed that different sites had significant effects on the decomposition rate of P. tabulaeformis leaf litters (P<0.05). The leaf litters decomposed faster at suburban site than at urban site, suggesting that environmental conditions had significant effects on the decomposition. In the same stands, different litter types had significant effects on the litter decomposition (P<0.05). The decomposition rate of the litters was faster at urban site than at suburban site, suggesting the significant effects of inherent characters of the litters. Site had no significant effects on the N-and P remaining percentages, but litter type had significant effects. Urban leaf litter, due to its higher initial C/N and C/P, were easy to enrich N and P during decomposition, as compared with suburban leaf litter.

Key words: cold-shock, high temperature stress, tomato seedlings, biomembrane protection system, small heat shock protein.

郭芳琴1,2,何兴元1,陈玮1**,黄彦青1. 沈阳城市和城郊油松凋落叶的分解动态[J]. 生态学杂志, 2012, 31(06): 1397-1403.

GUO Fang-qin1,2, HE Xing-yuan1, CHEN Wei1**, HUANG Yan-qing1. Decomposition dynamics of Pinus tabulaeformis leaf litter at urban and suburban sites of Shenyang, Northeast China.[J]. cje, 2012, 31(06): 1397-1403.

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