地理科学 ›› 2015, Vol. 35 ›› Issue (2): 217-222.doi: 10.13249/j.cnki.sgs.2015.02.217
宁凯1,2,3, 于君宝1,2(), 屈凡柱1,2,3, 王光美1,2, 管博1,2
收稿日期:
2014-01-25
修回日期:
2014-04-18
出版日期:
2015-02-15
发布日期:
2015-02-15
作者简介:
作者简介:宁凯(1986-),男,博士研究生,主要从事生物地球化学研究。E-mail:
基金资助:
Kai NING1,2,3, Jun-bao YU1,2(), Fan-zhu QU1,2,3, Guang-mei WANG1,2, Bo GUAN1,2
Received:
2014-01-25
Revised:
2014-04-18
Online:
2015-02-15
Published:
2015-02-15
摘要:
利用SCJ-302型降水降尘自动采样器在植物生长季对黄河三角洲滨海湿地的大气氮沉降进行监测,对沉降物中水溶性离子、干、湿沉降氮输入量、铵态氮和硝态氮在总沉降量中的贡献率及月变化动态等分析表明:黄河三角洲植物生长季,大气干、湿沉降中SO42-和NO3-占阴离子总量的92%以上,和Na+和Ca2+占阳离子总量的80%以上,总N沉降量约为2 264.24 mg/m2,且69%集中在降雨量较丰沛的6-8月。其中干沉降氮贡献率约为32.02%,主要集中在春季。N的湿沉降量与降雨量呈显著正线性相关(R2=0.82),在降雨量丰沛的8月,达到最大值675.64 mg/m2。该地区大气干沉降的氮素形态以硝态氮为主,约占氮素输入量的57.21%,湿沉降中以铵态氮为主,约占氮素输入量的56.51%。植物生长季中,大气沉降中的硝态氮与铵态氮含量对表层10 cm土壤的月平均贡献率分别为约31.38%和20.50%,可见大气氮沉降是黄河三角洲滨海区域土壤主要氮素来源之一。
中图分类号:
宁凯, 于君宝, 屈凡柱, 王光美, 管博. 黄河三角洲滨海地区植物生长季大气氮沉降动态[J]. 地理科学, 2015, 35(2): 217-222.
Kai NING, Jun-bao YU, Fan-zhu QU, Guang-mei WANG, Bo GUAN. Atmospheric Nitrogen Deposition During Growing Season in Coastal Zone of the Yellow River Delta[J]. SCIENTIA GEOGRAPHICA SINICA, 2015, 35(2): 217-222.
表 1
大气氮沉降量的月变化"
月份(月) | 干沉降 | 湿沉降 | NO3--N | NH4+-N | 总N输入量 (mg/m2) | ||||
---|---|---|---|---|---|---|---|---|---|
N含量 (mg/m2) | 所占比例 (%) | N含量 (mg/m2) | 所占比例 (%) | 含量 (mg/m2) | 所占比例 (%) | 含量 (mg/m2) | 所占比例 (%) | ||
5 | 139.99 | 53.68 | 120.79 | 46.32 | 178.55 | 68.47 | 82.23 | 31.53 | 260.78 |
6 | 103.62 | 27.39 | 274.77 | 72.61 | 242.70 | 64.14 | 135.69 | 35.86 | 378.39 |
7 | 119.84 | 30.04 | 279.03 | 69.96 | 175.42 | 43.98 | 223.44 | 56.02 | 398.87 |
8 | 111.12 | 14.12 | 675.64 | 85.88 | 280.22 | 35.62 | 506.54 | 64.38 | 786.76 |
9 | 77.70 | 41.99 | 107.34 | 58.01 | 97.72 | 52.81 | 87.32 | 47.19 | 185.03 |
10 | 91.66 | 60.89 | 58.88 | 39.11 | 77.15 | 51.25 | 73.38 | 48.75 | 150.54 |
11 | 81.00 | 77.98 | 22.88 | 22.02 | 32.37 | 31.17 | 71.50 | 68.83 | 103.87 |
总计 | 724.92 | 32.02 | 1539.32 | 67.98 | 1084.13 | 47.88 | 1180.11 | 52.12 | 2264.24 |
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