The influence of morphological characteristics of Caragana korshinskii on stemflow production

doi:10.7522/j.issn.1000-694X.2025.00056

Journal of Desert Research ›› 2025, Vol. 45 ›› Issue (3): 346-356.DOI: 10.7522/j.issn.1000-694X.2025.00056

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The influence of morphological characteristics of Caragana korshinskii on stemflow production

Weiqi Yao¹^,²(), Yafeng Zhang¹(), Chuan Yuan³, Jingliang Chen¹^,², Jianqiang Huo¹, Yanxia Pan¹, Miaomiao Wang⁴

^1.State Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands / Shapotou Desert Research and Experiment Station，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.University of Chinese Academy of Sciences，Beijing 100049，China
^3.School of Geographical Sciences / Chongqing Jinfo Moutain Karst Ecosystem National Observation and Research Station，Southwest University，Chongqing 400715，China
^4.State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems / College of Pastoral Agriculture Science and Technology，Lanzhou University，Lanzhou 730020，China

Received:2025-04-01 Revised:2025-05-07 Online:2025-05-20 Published:2025-06-30
Contact: Yafeng Zhang

Abstract

Abstract:

Stemflow refers to the portion of precipitation intercepted by plant canopies that flows down along stems and accumulates in root zone soil， serving as an important water and nutrient source for shrubs in arid regions. In this study， we conducted field observations of stemflow for Caragana korshinskii， a dominant sand-fixing shrub of Shapotou area， located at the southeastern edge of the Tengger Desert. We then quantified the effects of shrub morphological metrics on stemflow production. Our results indicated that：（1） stemflow accounted for 3.62% of the gross rainfall；（2） stemflow rate （stemflow volume per unit rainfall， mL·mm^-1） had a significant positive correlation （P<0.05） with plant height， basal diameter， number of branches， canopy volume， and canopy projection area， respectively； and （3） Based on entropy weight method analysis， the morphological metrics influencing stemflow yield across shrub branches were prioritized as follows：basal diameter （0.50） > branch inclination angle （0.28） > branch length （0.22）. Our study contributes valuable insights into vegetation-soil system water cycle processes in arid regions， providing both data support and methodological references for evaluating the effects of plant morphological parameters on stemflow production.

Key words: stemflow, sand-fixing shrubs, canopy structure, entropy weight method

CLC Number:

S715.3

Weiqi Yao, Yafeng Zhang, Chuan Yuan, Jingliang Chen, Jianqiang Huo, Yanxia Pan, Miaomiao Wang. The influence of morphological characteristics of Caragana korshinskii on stemflow production[J]. Journal of Desert Research, 2025, 45(3): 346-356.

Figures/Tables 11

References 58

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形态参数	编号
形态参数	Ck_1	Ck_2	Ck_3	Ck_4	Ck_5
株高/m	2.88	2.07	2.04	1.85	1.98
冠幅/cm	308×409	199×206	180×155	247×265	178×202
基径/mm	48.48	24.48	23.45	21.25	21.09
基部面积/m²	0.129	0.122	0.062	0.034	0.032
叶面积指数	1.07	0.86	0.55	1.07	0.62
分枝数/个	26	11	13	11	14
冠层投影面积/m²	9.89	3.22	2.19	5.14	2.82
冠层体积/m³	9.50	2.22	1.49	3.17	1.86

形态参数	编号
形态参数	Ck_1	Ck_2	Ck_3	Ck_4	Ck_5
株高/m	2.88	2.07	2.04	1.85	1.98
冠幅/cm	308×409	199×206	180×155	247×265	178×202
基径/mm	48.48	24.48	23.45	21.25	21.09
基部面积/m²	0.129	0.122	0.062	0.034	0.032
叶面积指数	1.07	0.86	0.55	1.07	0.62
分枝数/个	26	11	13	11	14
冠层投影面积/m²	9.89	3.22	2.19	5.14	2.82
冠层体积/m³	9.50	2.22	1.49	3.17	1.86

编号	基径/mm	长度/cm	朝向/（°）	枝下高/cm	倾角>65°	倾角<65°
Ck_1	0.48^*	0.39	-0.15	-0.19	-0.51^*	0.90^**
Ck_2	0.89^**	-0.66^*	-0.19	-0.47	-0.89^**	0.97^*
Ck_3	0.92^**	0.78^**	-0.14	-0.09	-0.98^*	0.66
Ck_4	0.78^*	0.93^**	0.17	-0.07	NA	0.95^**
Ck_5	0.99^**	0.61^*	0.14	0.51	-0.84^*	-0.62

编号	基径/mm	长度/cm	朝向/（°）	枝下高/cm	倾角>65°	倾角<65°
Ck_1	0.48^*	0.39	-0.15	-0.19	-0.51^*	0.90^**
Ck_2	0.89^**	-0.66^*	-0.19	-0.47	-0.89^**	0.97^*
Ck_3	0.92^**	0.78^**	-0.14	-0.09	-0.98^*	0.66
Ck_4	0.78^*	0.93^**	0.17	-0.07	NA	0.95^**
Ck_5	0.99^**	0.61^*	0.14	0.51	-0.84^*	-0.62

序号	基径 /mm	基径标准化系数	基径评价值	长度 /cm	长度标准化系数	长度评价值	倾角 /（°）	倾角标准化系数	倾角评价值	综合评价值
A	28	0.130	0.039	237	0.120	0.009	20	0.049	0.031	0.078
B	25	0.066	0.050	237	0.060	0.012	85	0.061	0.003	0.065
C	8.5	0.023	0.017	221	0.056	0.011	90	0.065	0.003	0.031
D	13.5	0.036	0.027	229	0.058	0.012	90	0.064	0.003	0.042
E	33.55	0.089	0.067	225	0.057	0.011	85	0.061	0.003	0.081
F	16.51	0.044	0.033	221	0.056	0.011	85	0.061	0.003	0.047
G	18.12	0.048	0.036	269	0.068	0.014	90	0.064	0.003	0.053
H	19.56	0.052	0.039	141	0.036	0.007	85	0.061	0.003	0.049
I	17.46	0.046	0.035	174	0.044	0.009	90	0.064	0.003	0.047
J	19.53	0.052	0.039	275	0.069	0.014	90	0.064	0.003	0.056
K	18.44	0.085	0.026	267	0.135	0.010	60	0.146	0.091	0.127
L	33.88	0.157	0.047	261	0.132	0.010	65	0.159	0.099	0.156
M	36.27	0.096	0.073	263	0.066	0.013	70	0.050	0.002	0.088
N	25.63	0.119	0.036	199	0.101	0.007	60	0.146	0.091	0.135
O	32.39	0.086	0.065	216	0.054	0.011	75	0.053	0.002	0.078
P	20.1	0.053	0.040	275	0.069	0.014	80	0.057	0.002	0.056
Q	16.67	0.044	0.033	288	0.073	0.015	80	0.057	0.002	0.050
R	26.49	0.070	0.053	172	0.043	0.009	70	0.050	0.002	0.064
S	18.41	0.085	0.026	202	0.102	0.008	65	0.159	0.099	0.132
T	25.97	0.069	0.052	229	0.058	0.012	75	0.053	0.002	0.066
U	16.48	0.044	0.033	251	0.063	0.013	85	0.061	0.003	0.048
V	32.37	0.086	0.065	282	0.071	0.014	80	0.057	0.002	0.081
W	12.58	0.058	0.018	174	0.088	0.006	50	0.122	0.076	0.100
X	23.65	0.110	0.033	197	0.100	0.007	35	0.085	0.053	0.094
Y	24.24	0.112	0.034	227	0.115	0.008	30	0.073	0.046	0.088
Z	31.05	0.144	0.043	212	0.107	0.008	25	0.061	0.038	0.089

The influence of morphological characteristics of Caragana korshinskii on stemflow production

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综合评价值	Ck_1	Ck_2	Ck_3	Ck_4	Ck_5
>65°	0.71^**	-0.86^*	0.92^**	NA	0.84^*
≤65°	0.31	0.99^*	0.66	0.97^**	0.98^*

编号	基径/mm	长度/cm	倾角/（°）
Ck_1（>65°）	0.75	0.20	0.04
Ck_1（≤65°）	0.30	0.07	0.62
Ck_2（>65°）	0.18	0.35	0.47
Ck_2（≤65°）	0.41	0.03	0.57
Ck_3（>65°）	0.68	0.25	0.07
Ck_3（≤65°）	0.45	0.46	0.10
Ck_4（≤65°）	0.33	0.21	0.46
Ck_5（>65°）	0.81	0.11	0.08
Ck_5（≤65°）	0.56	0.30	0.14
平均值±标准差	0.50±0.20	0.22±0.13	0.28±0.23

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