Reproductive characteristics of Artemisia scoparia and the analysis of the underlying soil drivers in a desert steppe of China

doi:10.17521/cjpe.2018.0211

Abstract

Abstract:

Aims Reproduction is an important part of plant life activities, and thus the reproductive characteristics of plants play an important role in explaining the ecological adaptability of plants as well as developing effective management strategy plans. The aims of this study are to explore the reproductive characteristics of Artemisia scoparia and analyze its main soil driving factors in a desert steppe of China.
Methods As a method to extract and summarize the variation in a set of response variables, the redundancy analysis can be explained by a group of explanatory variables. In the present study, we selected the A. scoparia population in a desert steppe, and examined physicochemical properties of different soil types and reproductive characteristics of A. scoparia with the redundancy analysis.
Important findings There were significant differences in water-soluble carbon content (C_ws), total nitrogen content (TN), total phosphorus content (TP), total salt content (TS), soil moisture (M_s) and soil hardness (SH) of calcareous soil (SS), aeolian sand soil (ASS) and weathered residual soil (WB). The average mass (M_a), the number (N_i) of average individual head inflorescence, and the average individual size (S_ai) of a single plant were the largest in the SS habitat, followed by ASS and WB. No significant difference was observed in reproductive allocation (R_a) of A. scoparia in different soil types. An extremely significant positive correlation was observed between R_a and the quality of single capitate inflorescence (M_e), N_i and M_a, respectively, while N_i was negatively correlated with M_e. The variation of the reproductive characteristics of A. scoparia was mainly affected by soil water soluble carbon content (C_ws), soil hardness (SH), soil moisture (M_s), TP and available phosphorus content (AP) in WB habitat. M_a was mainly affected by C_ws, M_s and pH value; N_i was mainly affected by total salt content (TS); R_a and M_e were mainly affected by total carbon content (C_t) in the ASS habitat. M_a was positively correlated with C_ws, M_s and C_o, while the correlation between M_a and C_o was not significant; N_i was significantly affected by available nitrogen content (AN) in the SS habitat. A comprehensive analysis of the three soil types showed that the total explanatory amount of soil factors affecting the reproductive characteristics of A. scoparia was 30.74%. M_a and N_i were significantly affected by C_ws and M_s. R_a and M_e were negatively correlated with C_ws and M_s though they are not statistically significant. We conclude that C_ws and M_s are the main soil factors affecting the reproductive characteristics of A. scoparia populations in the desert grassland.

http://jtp.cnki.net/bilingual/detail/html/ZWSB201901007

Key words: desert steppe, Artemisia scoparia, reproductive characteristic, soil factor, redundancy analysis

CHEN Lin, WANG Lei, YANG Xin-Guo, SONG Nai-Ping, LI Yue-Fei, SU Ying, BIAN Ying-Ying, ZHU Zhong-You, MENG Wen-Ting. Reproductive characteristics of Artemisia scoparia and the analysis of the underlying soil drivers in a desert steppe of China[J]. Chin J Plant Ecol, 2019, 43(1): 65-76.

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References 61

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土壤特性 Soil property	ASS	SS	WB	ANOVA
土壤特性 Soil property	ASS	SS	WB	F	p
C_eo (mg·g^-1)	1.022 ± 0.760	1.088 ± 1.065	0.639 ± 0.337	2.192	0.115
C_ws (mg·g^-1)	0.048 ± 0.178	0.209 ± 0.439	0.297 ± 0.557	7.006	<0.001^***
C_o (%)	0.449 ± 0.477	0.450 ± 0.187	0.424 ± 0.139	0.042	0.959
Ct (%)	0.541 ± 0.242	0.605 ± 0.401	0.654 ± 0.268	1.594	0.206
AP (mg·kg^-1)	2.776 ± 1.875	2.625 ± 1.854	1.755 ± 1.170	2.672	0.072
AK (mg·kg^-1)	81.592 ± 37.170	71.040 ± 40.591	70.963 ± 40.242	1.668	0.192
AN (mg·kg^-1)	230.668 ± 123.556	191.756 ± 54.719	237.687 ± 285.222	1.787	0.170
TN (%)	0.034 ± 0.013	0.040 ± 0.013	0.027 ± 0.011	9.938	<0.001^***
TP (%)	0.029 ± 0.013	0.037 ± 0.010	0.038 ± 0.010	10.480	<0.001^***
pH	9.076 ± 0.209	9.092 ± 0.165	9.090 ± 0.288	0.191	0.827
TS (g·kg^-1)	0.265 ± 0.045	0.315 ± 0.198	0.317 ± 0.155	3.409	0.035^*
M_s. 10 cm (%)	7.591 ± 1.997	10.268 ± 3.757	8.990 ± 2.813	17.556	<0.001^***
M_s. 20 cm (%)	7.309 ± 2.588	9.902 ± 4.008	8.768 ± 1.898	13.529	<0.001^***
M_s. 0-20 cm (%)	7.489 ± 1.707	10.031 ± 3.274	8.747 ± 1.652	22.330	<0.001^***
SH. 5 cm (kPa)	1 003.436 ± 516.201	1 245.283 ± 796.110	1 060.000 ± 560.993	2.824	0.062
SH. 10 cm (kPa)	1 377.634 ± 709.554	1 697.746 ± 1 196.433	1 611.250 ± 870.530	2.058	0.131
SH. 20 cm (kPa)	2 032.554 ± 1303.646	2 465.967 ± 1 338.089	2 281.400 ± 1 124.882	2.140	0.121
SH. 0-20 cm (kPa)	1 471.208 ± 678.777	1 807.194 ± 896.430	1 659.950 ± 726.002	3.714	0.026^*

土壤特性 Soil property	ASS	SS	WB	ANOVA
土壤特性 Soil property	ASS	SS	WB	F	p
C_eo (mg·g^-1)	1.022 ± 0.760	1.088 ± 1.065	0.639 ± 0.337	2.192	0.115
C_ws (mg·g^-1)	0.048 ± 0.178	0.209 ± 0.439	0.297 ± 0.557	7.006	<0.001^***
C_o (%)	0.449 ± 0.477	0.450 ± 0.187	0.424 ± 0.139	0.042	0.959
Ct (%)	0.541 ± 0.242	0.605 ± 0.401	0.654 ± 0.268	1.594	0.206
AP (mg·kg^-1)	2.776 ± 1.875	2.625 ± 1.854	1.755 ± 1.170	2.672	0.072
AK (mg·kg^-1)	81.592 ± 37.170	71.040 ± 40.591	70.963 ± 40.242	1.668	0.192
AN (mg·kg^-1)	230.668 ± 123.556	191.756 ± 54.719	237.687 ± 285.222	1.787	0.170
TN (%)	0.034 ± 0.013	0.040 ± 0.013	0.027 ± 0.011	9.938	<0.001^***
TP (%)	0.029 ± 0.013	0.037 ± 0.010	0.038 ± 0.010	10.480	<0.001^***
pH	9.076 ± 0.209	9.092 ± 0.165	9.090 ± 0.288	0.191	0.827
TS (g·kg^-1)	0.265 ± 0.045	0.315 ± 0.198	0.317 ± 0.155	3.409	0.035^*
M_s. 10 cm (%)	7.591 ± 1.997	10.268 ± 3.757	8.990 ± 2.813	17.556	<0.001^***
M_s. 20 cm (%)	7.309 ± 2.588	9.902 ± 4.008	8.768 ± 1.898	13.529	<0.001^***
M_s. 0-20 cm (%)	7.489 ± 1.707	10.031 ± 3.274	8.747 ± 1.652	22.330	<0.001^***
SH. 5 cm (kPa)	1 003.436 ± 516.201	1 245.283 ± 796.110	1 060.000 ± 560.993	2.824	0.062
SH. 10 cm (kPa)	1 377.634 ± 709.554	1 697.746 ± 1 196.433	1 611.250 ± 870.530	2.058	0.131
SH. 20 cm (kPa)	2 032.554 ± 1303.646	2 465.967 ± 1 338.089	2 281.400 ± 1 124.882	2.140	0.121
SH. 0-20 cm (kPa)	1 471.208 ± 678.777	1 807.194 ± 896.430	1 659.950 ± 726.002	3.714	0.026^*

繁殖特征 Reproductive characteristic	土壤类型 Soil type	最大值 Max value	最小值 Min value	平均值 Average	标准偏差 Standard deviation	变异系数 Coefficient of variation
S_ai	ASS	157.89	0.16	7.07	19.75	2.79
	SS	138.22	0.25	10.60	25.62	2.42
	WB	4.02	0.29	1.28	1.23	0.95
R_a	ASS	0.78	0.05	0.54	0.13	0.24
	SS	0.73	0.21	0.52	0.11	0.20
	WB	0.61	0.33	0.49	0.08	0.14
N_i	ASS	108 841.00	107.00	4 700.94	14 557.55	3.07
	SS	79 019.00	122.00	7 283.31	17 272.63	2.37
	WB	3 414.00	202.00	941.47	988.64	1.05
M_e	ASS	42.2	1.8	8.1	4.7	5.5
	SS	15.0	2.9	7.2	2.3	3.2
	WB	7.7	4.7	6.1	1.0	1.6
M_a	ASS	71.25	0.06	3.25	9.14	2.79
	SS	68.30	0.06	4.82	12.41	2.58
	WB	2.13	0.14	0.59	0.63	1.06

繁殖特征 Reproductive characteristic	土壤类型 Soil type	最大值 Max value	最小值 Min value	平均值 Average	标准偏差 Standard deviation	变异系数 Coefficient of variation
S_ai	ASS	157.89	0.16	7.07	19.75	2.79
	SS	138.22	0.25	10.60	25.62	2.42
	WB	4.02	0.29	1.28	1.23	0.95
R_a	ASS	0.78	0.05	0.54	0.13	0.24
	SS	0.73	0.21	0.52	0.11	0.20
	WB	0.61	0.33	0.49	0.08	0.14
N_i	ASS	108 841.00	107.00	4 700.94	14 557.55	3.07
	SS	79 019.00	122.00	7 283.31	17 272.63	2.37
	WB	3 414.00	202.00	941.47	988.64	1.05
M_e	ASS	42.2	1.8	8.1	4.7	5.5
	SS	15.0	2.9	7.2	2.3	3.2
	WB	7.7	4.7	6.1	1.0	1.6
M_a	ASS	71.25	0.06	3.25	9.14	2.79
	SS	68.30	0.06	4.82	12.41	2.58
	WB	2.13	0.14	0.59	0.63	1.06

土壤因子 Soil indicator	ASS			SS			WB			综合分析 Comprehensive analysis
土壤因子 Soil indicator	解释量 Variance explained (%)	F	p	解释量 Variance explained (%)	F	p	解释量 Variance explained (%)	F	p	解释量 Variance explained (%)	F	p
AK	0.10	< 0.1	0.817	6.02	3.7	0.053	3.10	0.6	0.468	1.45	2.6	0.101
AN	0.66	0.7	0.424	10.04	6.5	0.014	0.20	< 0.1	0.933	<0.01	< 0.1	0.969
AP	0.02	< 0.1	0.973	2.44	1.4	0.227	21.90	5.0	0.035	0.06	0.1	0.803
C_eo	0.28	0.3	0.613	0.33	0.2	0.685	0.30	< 0.1	0.841	0.05	< 0.1	0.807
C_o	1.34	1.3	0.247	4.17	2.5	0.112	2.70	0.5	0.487	0.28	0.5	0.468
pH	2.16	2.2	0.132	0.80	0.5	0.494	0.10	< 0.1	0.910	1.18	2.1	0.144
SH	0.25	0.2	0.644	0.55	0.3	0.590	43.60	13.9	0.002	0.17	0.3	0.593
SH. 5 cm	1.57	1.6	0.208	1.93	1.1	0.282	20.90	4.8	0.038	0.27	0.5	0.499
SH. 10 cm	0.36	0.4	0.572	0.12	< 0.1	0.849	29.00	7.3	0.014	0.31	0.6	0.466
SH. 20 cm	0.11	0.1	0.783	5.25	3.2	0.071	37.30	10.7	0.004	0.05	< 0.1	0.820
M_s	6.44	6.8	0.011	47.88	53.3	< 0.001	32.40	8.6	0.007	16.89	36.4	< 0.001
M_s. 10 cm	8.46	9.2	0.003	43.20	44.1	< 0.001	15.40	3.3	0.084	16.62	35.7	< 0.001
M_s. 20 cm	0.68	0.7	0.407	35.26	31.6	< 0.001	18.20	4.0	0.062	8.79	17.3	< 0.001
C_t	2.81	2.9	0.087	0.71	0.4	0.484	3.00	0.6	0.471	0.26	0.5	0.497
TN	0.66	0.7	0.421	0.18	0.1	0.790	16.70	3.6	0.071	0.10	0.2	0.706
TP	0.13	0.1	0.769	0.98	0.6	0.467	55.40	22.3	< 0.001	1.32	2.4	0.122
TS	5.36	5.6	0.018	0.61	0.4	0.486	12.20	2.5	0.121	0.34	0.6	0.435
C_ws	6.87	7.3	0.008	22.10	16.5	< 0.001	71.70	45.6	< 0.001	19.90	44.5	< 0.001