亚热带常绿阔叶林凋落物生产及季节动态对模拟氮沉降增加的响应

生态学杂志

亚热带常绿阔叶林凋落物生产及季节动态对模拟氮沉降增加的响应

张驰¹,张林¹,李鹏²,施文涛¹,徐小牛^1**

（¹安徽农业大学林学与园林学院，合肥 230036； ²北京大学城市与环境学院，北京 100089）

出版日期:2014-05-10 发布日期:2014-05-10

Response of litter production and its seasonality to increased nitrogen deposition in a subtropical evergreen broad-leaved forest.

ZHANG Chi¹, ZHANG Lin¹, LI Peng², SHI Wen-tao¹, XU Xiao-niu^1**

(¹College of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei 230036, China; ²Department of Ecology, College of Urban & Environmental Sciences, Peking University, Beijing 100089, China)

Online:2014-05-10 Published:2014-05-10

摘要/Abstract

摘要： 通过野外模拟试验，研究了亚热带常绿阔叶林凋落物量对氮沉降的初期响应。试验设计4种处理，分别为对照（CK）、低氮（LN，50 kg·hm^-2·a^-1）、高氮（HN，100 kg·hm^-2·a^-1）和高氮加磷(HN+P，100 kg N·hm^-2·a^-1 + 50 kg P·hm^-2·a^-1)，每个处理重复3次。通过2年的试验观测，甜槠林对照林分年总凋落物量为7.78 t·hm^-2，经LN、HN、HN+P处理后，年总凋落物量分别为8.81、9.08、9.41 t·hm^-2，不同处理间没有显著差异，表明氮沉降增加没有显著提高凋落物产量，但高氮处理林分，叶凋落物量表现出抑制效果，低于低氮处理；高氮+磷处理的林分凋落物总量及落叶、落枝量均明显高于高氮、低氮处理，磷添加呈现凋落物量增加的效应。甜槠林分总凋落物量表现出明显的季节动态，在春季4—5月以及秋季11月出现2个明显的峰值，不同处理趋势一致。凋落物组成中，落叶的比例占总凋落物量的53.78%～58.84%，花果杂物占28.29%～33.66%，落枝占10.79%～12.87%。研究表明，高氮处理可能引起了土壤氮素过剩，造成氮、磷失衡。

关键词: 凋落叶分解, 长白山, 底栖动物, 冻结初期, 凋落叶混合效应

Abstract: A field simulated experiment was conducted to study the effects of nitrogen deposition on the litter production of a subtropical evergreen broad-leaved forest. Treatments were designed as CK (0 kg·hm^-2·a^-1), low N (LN, 50 kg·hm^-2·a^-1), high N (HN, 100 kg·hm^-2·a^-1), high N+P (HN+P, 100 kg N·hm^-2·a^-1 + 50 kg P·hm^-2·a^-1), with three replicates for each treatment. The results from a twoyear observation showed that the annual litterfall production amounts were 7.78, 8.81, 9.08 and 9.41 t·hm^-2 for CK, LN, HN and HN+P, respectively. The N deposition did not significantly increase litterfall production in this subtropical forest. However, HN treatment decreased the production of foliar litterfall compared to LN treatment. The production of either foliar, branch or total litterfall was higher in HN+P treatment than in HN and LN treatments, indicating that P addition enhanced litterfall production. The monthly litterfall in all treatments showed similar seasonal patterns, with two peaks occurring in April to May and in November. Within litterfall components, foliar litter accounted for 53.78%-58.84%, sexual organs and miscellaneous accounted for 28.29%-33.66%, and branch accounted for 10.79%-12.87%. Results from this study demonstrated that high N treatment could result in excess N and imbalance of N and P in soils.

Key words: Changbai Mountains, litter mixing effect, litter decomposition, early frost period, benthic macroinvertebrate

张驰1,张林1,李鹏2,施文涛1,徐小牛1**. 亚热带常绿阔叶林凋落物生产及季节动态对模拟氮沉降增加的响应[J]. 生态学杂志.

ZHANG Chi1, ZHANG Lin1, LI Peng2, SHI Wen-tao1, XU Xiao-niu1**. Response of litter production and its seasonality to increased nitrogen deposition in a subtropical evergreen broad-leaved forest.[J]. cje.

[1]	邹明明,朱慧兰,郭玉清. 广西防城港东湾红树林湿地春季小型底栖动物丰度与生物量 [J]. 生态学杂志, 2020, 39(6): 1823-1829.
[2]	朱慧兰,刘梦迪,周宇鸿,郭玉清. 深圳湾福田红树林湿地小型底栖动物群落结构及海洋线虫新纪录种 [J]. 生态学杂志, 2020, 39(6): 1806-1812.
[3]	肖泓,尹煮石,张敏,陈桂珠,彭逸生. 广东电白人工红树林大型底栖动物群落的功能特征及其影响因子 [J]. 生态学杂志, 2020, 39(6): 1813-1822.
[4]	江为群,刘淑丽,简敏菲,胡启武. 鄱阳湖主要入湖段典型底栖动物体内微塑料累积特征 [J]. 生态学杂志, 2020, 39(4): 1273-1280.
[5]	敖偲成,胡建成,李先福,谭路,叶麟,蔡庆华. 独龙江河流生态系统健康评价 [J]. 生态学杂志, 2020, 39(4): 1281-1287.
[6]	冯瑞芳,刘育伟,郭可馨,蓝丽英,谌亚,刘静如,谭波. 土壤节肢动物对箭竹凋落叶分解过程中酶活性的影响 [J]. 生态学杂志, 2020, 39(3): 775-785.
[7]	王琰,童春富,汤琳,吴阿娜,吴逢润. 崇明东滩盐沼湿地大型底栖动物功能群分布特征及其影响因子 [J]. 生态学杂志, 2020, 39(3): 880-892.
[8]	全秋梅, 肖雅元, 徐姗楠, 符芳菲, 李纯厚, 刘永. 胶州湾大型底栖动物群落结构季节变化及其与环境因子的关系 [J]. 生态学杂志, 2020, 39(12): 4110-4120.
[9]	张衡,张瑛瑛,刁山洲,叶锦玉,徐博,冯春雷,戴阳. 长江口盐沼湿地不同亚生境的大型底栖动物群落组成和多样性差异 [J]. 生态学杂志, 2019, 38(10): 3102-3109.
[10]	刘一霆,刘欣禹,冷宇,徐兆东,王振钟,温若冰. 2004—2015年春季小清河口潮间带大型底栖动物群落特征变化 [J]. 生态学杂志, 2018, 37(4): 1187-1196.
[11]	冯建祥,黄茜,陈卉,申倩倩,黄建荣,黎祖福. 互花米草入侵对盐沼和红树林滨海湿地底栖动物群落的影响 [J]. 生态学杂志, 2018, 37(3): 943-951.
[12]	袁健美,张虎,汤晓鸿,于雯雯,贲成恺,高继先,刘培廷,胡海生,肖悦悦,许海华. 江苏潮间带大型底栖动物群落组成及次级生产力 [J]. 生态学杂志, 2018, 37(11): 3357-3363.
[13]	林罗敏1,官昭瑛2,郑训皓1,林叔忠3,王质军4,陈刚4,韦桂峰1*. 流溪河底栖动物群落结构及基于完整性指数的健康评价 [J]. 生态学杂志, 2017, 36(7): 2077-2084.
[14]	赵媛1,2,周旺明1*,王守乐1,2,周莉1,于大炮1,代力民1. 冻融对温带森林土壤碳、氮矿化作用的影响 [J]. 生态学杂志, 2017, 36(6): 1548-1554.
[15]	郑磊1,2,宋世凯1,2,袁秀亮1,2,董嘉琪1,2,李龙辉1*. 基于Biome-BGC模型和集合卡尔曼滤波方法的阔叶红松林生态系统水碳通量模拟 [J]. 生态学杂志, 2017, 36(6): 1752-1760.