摘要
为了监测黑龙江凉水国家级自然保护区的大气氮沉降水平,在2015年生长季用干湿沉降采集器连续观测了大气氮湿沉降和颗粒物干沉降量,并在非生长季用自制观测桶观测了大气混合氮沉降量.结果表明:(1)该区2015~2016年度大气氮沉降总通量(生长季湿沉降+颗粒物干沉降以及非生长季混合沉降)为12.93 kg·(hm^2·a)^(-1),其中无机氮沉降总通量为8.27kg·(hm^2·a)^(-1),NH_4^+/NO_3^-为1.3;有机氮沉降总通量为4.66 kg·(hm^2·a)^(-1),占全氮比例为36.0%.(2)生长季(湿沉降+颗粒物干沉降)和非生长季(混合沉降)氮沉降总量分别为11.42 kg·hm^(-2)和1.51 kg·hm^(-2),分别占全年氮沉降总通量的88.3%和11.7%.(3)生长季氮湿沉降总量为9.28 kg·hm^(-2),占生长季氮干湿沉降总量的81.3%,且与降水量显著正相关(R2=0.87,P<0.001);生长季颗粒物干沉降总量为2.14 kg·hm^(-2),占生长季干湿沉降总量的18.7%.该区氮湿沉降量受降水量影响明显,且在全国属于中等水平,存在一定的环境风险,当地在生活生产过程中应注意环境保护与水质监测.
To investigate the nitrogen deposition status in Heilongjiang Liangshui National Nature Reserve,a G78 nitrogen deposition collector was used to monitor dry particulate nitrogen deposition and wet nitrogen deposition during the growing season in 2015,and a bucket was used to monitor bulk nitrogen deposition during non-growing season. The results showed that：（1）Total nitrogen deposition（ wet nitrogen deposition ＋ dry particulate nitrogen deposition during the growing season and bulk deposition during the non-growing season） was 12. 93 kg·（hm^2·a）^-1,inorganic nitrogen deposition was 8. 27 kg·（hm^2·a）^-1 with NH4^＋/NO3^- ratio of 1. 3; organic nitrogen deposition was 4. 66 kg·（hm^2·a）^-1,which was equivalent to 36. 0% of the total nitrogen deposition.（2） Total nitrogen deposition in the growing season（ wet ＋ dry particulate deposition） and non-growing season（ bulk deposition） were 11. 42 kg·hm^-2 and 1. 51 kg·hm^-2 respectively,which account for 88. 3% and 11. 7% of the total nitrogen deposition respectively.（3） Total wet nitrogen deposition during the growing season was 9. 28 kg·hm^-2,contributing to 81. 3% of the total nitrogen deposition in the growing season,and was positively correlated with precipitation（ R2= 0. 87,P〈0. 001）; total dry particulate nitrogen deposition in the growing season was 2. 14 kg·hm^-2,which was 18. 7% of the total nitrogen deposition in growing season. Wet nitrogen deposition in this region is moderate compared with other regions in China,and is significantly affected by precipitation. There is a potential risk of environmental pollution in this region. Thus,environmental protection and water quality monitoring are required in the process of production.
作者
宋蕾
田鹏
张金波
金光泽
SONG Lei;TIAN Peng;ZHANG Jin-bo;JIN Guang-ze(Center for Ecological Research,Northeast Forestry University,Harbin 150040,China;School of Geography Sciences,Nanjing Normal University,Nanjing 210023,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2018年第10期4490-4496,共7页
Environmental Science
基金
国家重大科学研究计划项目(2014CB953803)
关键词
黑龙江凉水国家级自然保护区
颗粒物干沉降
湿沉降
无机氮沉降
有机氮沉降
Heilongjiang Liangshui National Nature Reserve
dry particulate deposition
wet deposition
inorganic nitrogen deposition
organic nitrogen deposition
