Nitrate Nitrogen Sources in Spring Waters in Azumino and Matsumoto
M. Kitabayashi, H. Toda Faculty of Science, Shinshu University
60 20
mgN/L
0.2 0.3 mgN/L
10
2009 8 9 15 4
18
2.3 mgN/L n=15, sd=2.0 2.5 mgN/L
n=18 sd=0.8 0.2 mgN/L n=4, sd=0.0315N +5.3 n=15, sd=0.7 +6.5 n=18, sd=0.9
53.9% n=15, sd=6.0 32.3% n=15, sd=4.0 13.8% n=15, sd=8.6
51.9% n=18, sd=5.7 39.2% n=18, sd=5.3 8.9%
n=18, sd=4.4
60
20
10 mgN/L
mgN/L
0.2 0.3 mgN/L
2006
10
Keywords: spring water, nitrate nitrogen, nitrogen stable isotope ratio, Azumino, Matsumoto
（原著論文） 信州大学環境科学年報 33号(2011)
-64-
14N 15N
Macko and Ostrom, 1994
2009 7 8
15
4
18 EC
1L 5L
Whatman GF/C
DIONEX DX-120
15N
Thermo
Fisher Scientific Flush EA 1112
Thermo Fisher Scientific Delta V Advantage15N=
0.2 15N
15N( ) (R /R 1) 1000
R 15N/14N
(1995)
W X Y Z
aW bX cY dZ
W mgN/L
X mgN/L
Y
mgN/L
Z mgN/L
a 15N ( )
b 15N ( )
c15N ( )
d 15N ( )
W a Z d
b c
200715N -0.6
0.8 +17.2 4.2
X/W Y/W
2008
95.5% 0.6%
2.9% 99.0%
83.8%
3.2% 4.9%
91.8% 2009
Y
0.2
mgN/L n=4, sd=0.03
0.6
7.0 mgN/L 2.3 mgN/L n=15, sd=2.0
0.9 3.7 mgN/L 2.5
mgN/L n=18, sd=0.8
t-test,
P>0.05
mgN/L
0.2
n=4 sd=0.03
-0.3
(n=4 sd=1.1)
2.3
n=15 sd=2.0
+5.3
(n=15 sd=0.7)
2.5
n=18 sd=0.8
+6.5
(n=18 sd=0.9)
-65-
0.3 mgN/L
15N -0.9
+1.3 -0.3 n=4, sd=1.1
15N +4.2 +6.6 +5.3 n=15
sd=0.715N +4.0 +8.7
+6.5 n=18, sd=0.9 15N
t-test, P>0.05
44.5
63.0% 53.9%, n=15, sd=6.0 25.5
40.6% 32.3%, n=15, sd=4.0 2.7
30.0% 13.8%, n=15, sd=8.6
34.9
58.7% 51.9%, n=18, sd=5.7 24.9
51.6% 39.2%, n=18, sd=5.3 5.1 21.2%
8.9%, n=18, sd=4.4
mgN/L
0.2 0.3 mgN/L
10
400m
2003
56.3%
11.5% 10.7% 9.4%
46.2% 20.4%
12.0% 9.1%
1999 2007
50% 1995
1999
90%
52 54 %
32 39 % 9 14 %
5 10 mgN/L
54 61 %
32 40 %
2007
2007
-66-
2.3 mgN/L n=15 sd=2.0
2.5 mgN/L n=18 sd=0.8
0.2 mgN/L, n=4, sd=0.03
15N
+5.3 n=15, sd=0.7
+6.5 n=18, sd=0.9
52 54 %
32 39 % 9 14 %
21 ISO
1999
11 58-59pp
2007
19 54-55pp
37
(11), 5-9.
2003
45(2), 145-168.
70(2), 207-213.
J. J.-L. 2006
256pp.
Macko, S. A. and N. E. Ostrom (1994) Pollution studies
using stable isotopes. In: K. Lajtha and R. H. Michener
(Editors), Stable Isotopes in Ecology and Environmental
Science, Blackwell Scientific, Oxford, pp. 45-62.
2009
20
199515N
66(5), 544-551.
2007
69pp.
2006
36(3),
117-122.
-67-
（原稿受付 2011.3.14）
