表(2)-5 植物体地上部の $ \delta^{13}C $ 、 $ d^{15}N $ 、C、N、CN 比の値。 1は2011年、2-4は2012年に採取した。

L¹	P²	species	d¹³C
(‰)	d¹⁵N
(‰)	C
(%)	N
(%)	CN
1	A	Salsora colina	-22.41	6.93	3.87
Kalidium foliatum	-22.92	7.46	2.53
Halocnetum sp.	-23.59	6.16	2.48
Koeleria sp.	-23.64	6.09	2.03
Artemisia macrocephala	-23.9	8.14	2.04
Nitralia sibirica	-23.91	7.23	2.75
Reaumuria soongorica	-24.32	6.02	2.61
Phragmites communis	-24.63	7.42	2.61
Bassia sp.	-25.09	6.01	2.47
Bassia dasiphylla	-25.63	9.69	1.61
Chenopodium album	-15.12	8.62	2.21
B	Alium mongolicum	-24.82	6.53	2.85
Bassia sp.	-25.4	10.98	3.25
Achnatherum splendens	-25.59	9.43	2.87
Bassia dasiphylla	-26.39	9.63	3.4
Polygonum lapathifolium	-27.62	10.57	3.21
Saussuria amara	-29.46	12.5	3.33
Chenopodium album	-13.79	9.99	2.21
C	Peganum nigellastrum	-23.38	17.71	2.7
Achnatherum splendens	-24.17	9.7	2.86
Alium polyrhizum	-24.29	9.37	2.8
Reaumuria soongorica	-24.4	5.83	2.78
Buplerem	-24.87	5.28	2.66
Kalidium foliatum	-24.92	10.29	2.5
Caragana leucophloea	-24.95	10.31	2.57
Alium mongolicum	-24.99	9.29	3.69
Carex sp.	-25.19	3.6	3.87
Stipa gobica	-26.59	4.52	3.24
Salsora colina	-13.95	8.52	3.69
Cleistogenes squrosa	-14.5	6.44	2.64
D	Bassia sp.	-22.88	8.26	2.69
Reaumuria soongorica	-24.56	7.78	1.76
Alium polyrhizum	-24.74	7.36	2.19
Kalidium foliatum	-24.87	7.48	3.71
Salsora colina	-13.71	8.65	1.26
Chenopodium album	-14.22	7.8	3.86
Cleistogenes squrosa	-14.24	5.08	3.14
2	B	Achantherum splendens	-26.27	12.98	43.08	3.23	13.32
Achantherum splendens	-26.56	12.53	42.95	2.73	15.74
Chenopodium acuminatum	-28.51	10.7	33.59	5.89	5.7
Chenopodium acuminatum	-29.19	10.99	33.3	5.08	6.56
Chenopodium acuminatum	-30.13	12.57	33.05	5.03	6.57
C	Achantherum splendens	-25.54	11.07	43.92	3.36	13.07
Eragrosts minor	-13.7	14.47	41.15	2.13	19.35
Eragrosts minor	-14.29	11.72	41.13	2.59	15.87
Eragrosts minor	-14.54	11.5	41.08	2.51	16.36
D	Stipa gobica	-25.08	7.73	46.03	2.63	17.51
Stipa gobica	-25.68	6.1	44.97	2.54	17.72
Stipa krylovii	-25.72	9.4	44.87	2.78	16.14
Stipa krylovii	-25.83	5.5	45.52	3.07	14.84
Stipa gobica	-26.27	8.7	45.05	3.04	14.84
Eragrosts minor	-14.24	10.27	41.37	1.96	21.07
Eragrosts minor	-14.47	8.58	42.09	1.99	21.19
3	A	Reaumuria soongorica	-24.6	9.44	37.36	2.98	12.55
Nitraria sibirica	-24.65	11.35	35.05	4.72	7.42
Reaumuria soongorica	-24.69	11.11	39.07	2.86	13.64
Nitraria sibirica	-25.37	13.11	34.63	4.85	7.14
Nitraria sibirica	-26.15	13.4	32.17	4.73	6.8
Kalidium sp.	-26.39	10.68	29.01	3.55	8.16
Kalidium sp.	-27.05	10.47	31.71	4.31	7.36
Kalidium sp.	-28.33	10.32	29.5	4.18	7.06
Chenopodium album	-12.79	15.32	31.38	3.75	8.37
Chenopodium album	-12.96	14.71	30.8	3.59	8.58
Chenopodium album	-12.96	14.64	29.83	4.07	7.33

L^{1}	P^{2}	species	d^{13}C (\%)	d^{15}N (\%)	C (\%)	N (\%)	C^{1}N
B	Achantherum splendens	-26.24	12.24	44.1	3.3	13.5
Achantherum splendens	-27.09	12.91	44.16	2.75	16.0
Bassia dasphylla	-27.51	11.37	34.97	5.48	6.3
Achantherum splendens	-27.97	11.69	45.1	3.14	14.5
Chenopodium acuminatum	-28.23	9.41	33.2	4.71	7.0
Chenopodium acuminatum	-28.27	11.81	32.36	4.94	6.5
Bassia dasphylla	-28.33	8.97	34.9	5.3	6.5
Chenopodium acuminatum	-28.44	12.73	33.1	4.73	7
Bassia dasphylla	-28.55	9.43	35.35	5.06	6.9
Salsola collina	-12.33	10.9	34.62	5.32	6.5
Salsola collina	-12.4	9.44	35.18	5.37	6.5
Salsola collina	-12.74	7.88	35.42	4.99	7.5
3	C	Achantherum splendens	-25.46	9.52	44.14	3.2	13.5
Achantherum splendens	-26.26	15.56	43.67	3.38	12.9
Achantherum splendens	-26.35	10.5	44.14	3.04	14.5
Chenopodium acuminatum	-26.7	15.21	35.7	4.06	8.7
Bassia dasphylla	-26.99	9.05	36.45	5.34	6.8
Chenopodium acuminatum	-27.01	13.66	34.66	4.01	8.6
Bassia dasphylla	-27.19	9.28	36.86	4.93	7.4
Chenopodium acuminatum	-27.27	17.96	33.51	4.62	7.2
Bassia dasphylla	-27.79	10.99	37.11	5.51	6.7
Salsola collina	-12.61	8.47	36.24	5.18	7
Salsola collina	-12.83	6.77	37.18	5.02	7.4
Salsola collina	-14.16	6.94	34.6	4.56	7.5
D	Caragana leucophloea	-23.53	10.18	49.22	4.07	12.5
Caragana leucophloea	-23.7	8.42	49.56	4.31	11.4
Allium polyrhizum	-24.26	9.29	47.87	4.91	9.7
Convolvulus ammanii	-24.83	9.67	45.89	3.74	12.5
Caragana leucophloea	-24.83	6.3	49.21	4.84	10.5
Allium polyrhizum	-24.99	10.8	47.92	5.53	8.6
Convolvulus ammanii	-25.05	-0.81	45.28	4.42	10.5
Convolvulus ammanii	-25.16	10.88	45.11	3.67	12.5
Allium mongolicum	-25.37	8.83	46.29	5.27	8.7
Allium mongolicum	-25.52	9.93	46.34	5.49	8.4
Allium polyrhizum	-26	10.62	47.6	4.4	10.5
Artemisia pectinata	-26.2	12.66	47.69	2.08	22.5
Allium mongolicum	-26.22	8.48	46.19	5.11	9.0
Artemisia pectinata	-26.57	10.92	47.54	2.81	16.5
Artemisia pectinata	-26.68	12.04	46.67	2.69	17.5
Artemisia sieversiana	-27.41	10.08	44.98	3.66	12.5
Artemisia sieversiana	-28.12	9.48	44.16	4.22	10.5
Artemisia sieversiana	-28.3	12.28	45.77	2.19	20.5
Eragrosts minor	-13.44	5.28	42.2	2.55	16.5
Eragrosts minor	-14.36	9.02	41.44	2.51	16.5
Eragrosts minor	-14.45	11.29	41.56	3.06	13.5
4	A	Kalidium foliatum	-25.72	6.68	28.46	4.68	6.0
Kalidium foliatum	-25.78	6.42	30.33	5.41	5.6
Achantherum splendens	-26.27	7	43.53	3.09	14.5
Kalidium foliatum	-26.59	6.77	31.22	4.83	6.4
Eragrosts minor	-14.87	6.7	40.73	4.52	9.0
Eragrosts minor	-15.07	3.21	41.07	4.81	8.5
Eragrosts minor	-15.3	5.47	40.31	3.84	10.5
B	Nitraria sibirica	-27.28	13.24	36.62	4.81	7.6
Achantherum splendens	-27.35	12.97	44.06	2.77	15.5
C	Achantherum splendens	-24.46	11.96	43.91	3.37	13.0
Achantherum splendens	-25.3	12.27	43.59	3.55	12.5
Achantherum splendens	-25.82	11.54	43.96	3.21	13.5
Eragrosts minor	-14.28	23.31	41.56	2.5	16.0
Eragrosts minor	-14.53	13.49	40.79	2.91	14.0
Eragrosts minor	-14.54	20.93	41.89	3.5	11.9

1: Line, 2: Plot

## 3 ）土壤中の炭素と窒素の深度別分布

ライン2-4のプロットBで、土壌中の炭素と窒素の含有率がいずれも土壌深度10-25 cmで高い傾向を示した（図(2)-14、図(2)-15）。他のプロットは表層から40 cmまでほぼ同様の値だった。このこ