太湖地区氮素湿沉降动态及生态学意义:以常熟生态站为例

应用生态学报 ›› 2004, Vol. ›› Issue (9): 1616-1620.

太湖地区氮素湿沉降动态及生态学意义:以常熟生态站为例

王小治^1,2, 朱建国¹, 高人³, 宝川靖和⁴

1. 中国科学院南京土壤研究所, 土壤与农业可持续发展国家重点实验室, 南京 210008;
2. 扬州大学, 扬州 225009;
3. 福建师范大学, 福州 350007;
4. 国际农林水产业研究中心, 筑波 305-8686 日本

收稿日期:2003-09-11 修回日期:2004-02-11
通讯作者: 朱建国
基金资助:
国家重点基础研究发展规划资助项目(G1999011806)

Dynamics and ecological significance of nitrogen wet-deposition in Taihu Lake region—Taking Changshu Agro-ecological Experiment Station as an example

WANG Xiaozhi^1,2, ZHU Jianguo¹, GAO Ren³, HOSEN Yasukazu ⁴

1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
2. Yangzhou University, Yangzhou 225009, China;
3. Fuian Normal University, Fuzhou 350007, China;
4. Japan International Research Center for Agricultural Sciences, Tsukuba 305-8686, Japan

Received:2003-09-11 Revised:2004-02-11

摘要/Abstract

摘要： 在常熟生态站2001年6月至2003年5月连续两年定位收集湿沉降,对太湖地区氮素湿沉降动态进行研究.结果表明,湿沉降氮输入量季节变化显著,夏、春季高,秋、冬季低.在湿沉降输入氮中NH₄⁺-N、NO₃^--N和DON的比例分别为47.6%、35.1%和17.4%.湿沉降中NH₄⁺-N主要来自当地农田的氨挥发,湿沉降NH₄⁺-N月输入量随月降雨量增加而增加(R²=0.3178^**).该地区空气中NO₃^--N浓度相对比较稳定,湿沉降中NO₃^--N浓度与降雨量呈负相关(R²=0.4205^***).湿沉降NO₃^--N月输入量与月降雨次数呈直线正相关(R²=0.6757^***),而与月降雨量相关性较差(R²=0.1985^*).湿沉降TN年输入量为27.0 kg·hm^-2,并在所有降雨中,氮浓度均超过水体富营养化阈值(0.2 mg·L^-1).

关键词: 太湖地区, 氮素湿沉降, 季节动态, 生态学意义

Abstract: Nitrogen wet deposition was monitored for two years (2001.6～2003.5) at the Changshu Ecological Station in Taihu Lake region.The results showed that the amount of nitrogen wet deposition had a strong seasonal pattern,with higher levels in summer and spring,and low values in autumn and winter.The proportions of NH₄^{+3^{-4^{+4^{+R²=0.3178 ^**),while the monthly NO₃^{-R²=0.1985 ^*) with monthly rainfall but positively related with the time of rainfall (R²=0.6757 ^***).The NO₃^{-R²=0.4205 ^***).The annual TN input from wet deposition was 27.0 kg·hm^-2,but its concentration in each rainfall was higher than 0.2 mg·L^-1 (the threshold N concentration for inland water eutrophication).The nitrogen inputted by wet deposition had an ecological significance on both nitrogen balance in agroecosystem and eutrophication.}}}}}}

Key words: Taihu Region, Nitrogen wet deposition, Seasonal dynamics, Ecological significance

中图分类号:

X131.2

王小治, 朱建国, 高人, 宝川靖和. 太湖地区氮素湿沉降动态及生态学意义:以常熟生态站为例[J]. 应用生态学报, 2004, (9): 1616-1620.

WANG Xiaozhi, ZHU Jianguo, GAO Ren, HOSEN Yasukazu . Dynamics and ecological significance of nitrogen wet-deposition in Taihu Lake region—Taking Changshu Agro-ecological Experiment Station as an example[J]. Chinese Journal of Applied Ecology, 2004, (9): 1616-1620.

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