College of Life Science and Technology,Inner Mongolia Normal University,Key Laboratory of Biodiversity Conservation and Sustainable Utilization in Mongolian Plateau forCollege and University of Inner Mongolia Autonomous Region,Hohhot,Inner Mongolia 010022,China
Objective The competitive pressure of Zygophyllum xanthoxylum in the western Ordos region, as well as the competition between Z. xanthoxylum and rare and endangered plants and other dominant species within the community, were investigated in order to provide a reference for the conservation and restoration of desert ecosystems. Methods Four common Z. xanthoxylum community types in western Ordos were investigated, and the intraspecific and interspecific competition were analyzed using the Hegyi individual-tree competition index model. Results The results showed that the interspecific competition intensity accounted for 85.07%, 80.52%, 88.76%, and 80.52% of the total competition intensity in the Z. xanthoxylum + Caragana brachypoda community, Z. xanthoxylum + Potaninia mongolica community, Z. xanthoxylum + Tetraena mongolica community, and Z. xanthoxylum + Ammopiptanthus mongolicus community, respectively, indicating that the competitive pressure on Z. xanthoxylum mainly came from interspecific competition. There were some differences in the competitive plant species of Z. xanthoxylum among different communities, C. brachypoda, P. mongolica, Artemisia sphaerocephala, T. mongolica, A. mongolicus and Reaumuria trigyna all had strong competitive effects on Z. xanthoxylum. The relationship between interspecific competition, total competition intensity, and the crown width of Z. xanthoxylum followed a power function model. With the increase of crown width, the competition index decreased continuously, and Z. xanthoxylum with smaller crown width experienced the greatest competitive pressure. Conclusion The Hegyi model can better reflect the competitive status of Z. xanthoxylum. In the four Z. xanthoxylum communities, interspecific competition is greater than intraspecific competition. The main competitive plant species differ among communities, and Z. xanthoxylum with smaller crown width experiences stronger competitive pressure. Paying attention to the competitive pressure on young plants of Z. xanthoxylum, supplemented by appropriate artificial measures, can enhance ecosystem stability.
文献参数: 冯婧, 王铁娟, 张蕊, 等.西鄂尔多斯霸王群落种内与种间的竞争关系[J].水土保持通报,2026,46(3):97-106. Citation:Feng Jing, Wang Tiejuan, Zhang Rui, et al. Intraspecific and interspecific competitive relationship of Zygophyllum xanthoxylum community in western Ordos [J]. Bulletin of Soil and Water Conservation,2026,46(3):97-106.
WangPing, WangTianhui, ZhouDaowei, et al. A literature review on the above and below-ground competition [J]. Acta Ecologica Sinica, 2007,27(8):3489-3499.
SunJianan, WangXiaoan, GuoHua, et al. Competitive relationships of dominant tree species in Pinus tabulaefirmis f.shekanensis community on Loess Plateau [J]. Chinese Journal of Ecology, 2010,29(11):2162-2167.
[5]
MalekiK, KivisteA, KorjusH. Analysis of individual tree competition on diameter growth of silver birch in Estonia [J]. Forest Systems, 2015,24(2):e023.
[6]
WeinerJ. Asymmetric competition in plant populations [J]. Trends in Ecology & Evolution, 1990,5(11):360-364.
LiuDehao, ChenZhitao, ShuXiazhu, et al. Interaspecific and intraspecific competitions of Ormosia boluoensis with extremely small population [J]. Forestry Science & Technology, 2024,49(4):14-18.
TongJianming, MaLirong. Study on intraspecific and interspecific competition of Cunninghamia lanceolata mixed forest in Fushou forest farm [J]. Central South Forest Inventory and Planning, 2020,39(2):44-50.
[11]
ZhangYanyan, ZhangErshan, XiaJihui, et al. Elevation-dependent variations in interspecific and intraspecific relationships of Quercus variabilis natural secondary forests [J]. Journal of Plant Ecology, 2025,18(3):rtaf037.
ZhouZeyu, ZhouChaofan, HuXingguo, et al. Single tree DBH growth model of spruce-fir natural forest based on distance related Hegyi index [J]. Journal of Beijing Forestry University, 2023,45(10):59-69.
[14]
ChenLijun, JiangWenqiang, GengYuepan, et al. Intra-and interspecific competition of endangered plant Tetracentron sinense Oliv [J]. Pakistan Journal of Botany, 2022,54(5):1903-1908.
[15]
中国科学院内蒙古宁夏综合考察队.内蒙古植被[M].北京:科学出版社,1985.
[16]
Inner Mongolia and Ningxia Scientific Expedition Group, Chinese Academy of Sciences. Vegetation in Inner Mongolia [M]. Beijing: Science Press, 1985.
LiYingkun, LiJinrong, DongLei, et al. The wind and sand resistance effect of four vegetation types in Ulan Buhe Desert [J]. Journal of Desert Research, 2022,42(6):65-73.
HanXiuzhen, MaJianwen, AosierBuhe, et al. The application of ETM and sample siets statistic data to study the distribution pattern of endangered rare plants in west Ordos Plateau [J]. Journal of Remote Sensing, 2002,6(2):136-141.
LiuRui, LiYi, LiuShizeng, et al. Analysis on intraspecific competition of Artermisia ordosica population in arid regions [J]. Chinese Agricultural Science Bulletin, 2013,29(10):51-57.
LinJianyong, LiJuan, LiangRuilong. Intraspecific and interspecific competition of Cycas micholitzii in the shrub layer [J]. Journal of Forest and Environment, 2019,39(2):159-164.
LiuHongyou, MaYan, WuQichao, et al. Intraspecific and interspecific competition of the endangered plant Salix taishanensis [J]. Journal of Forest and Environment, 2020,40(2):178-183.
[33]
HegyiF. A simulation model for managing jack-pine stands simulation[J]. Royalcoll, 1974,30:74-90.
ZhangChi, HuangZhongliang, LiJiong, et al. Quantitative relationships of intra-and interspecific competition in Cryptocarya concinna [J]. Chinese Journal of Applied Ecology, 2006,17(1):22-26.
[36]
AguiarM R, LauenrothW K, PetersD P. Intensity of intra and interspecific competition in coexisting shortgrass species [J]. Journal of Ecology, 2001,89(1):40-47.
ZhangHao, LiuWansheng, WangYanqi, et al. Intraspecific and interspecific competitions of the three hardwood tree species in northeast China [J]. Bulletin of Botanical Research, 2024,44(6):870-878.
WanZhiqiang, YangJiuyan, GaoFeng. Response of root characteristics of Potaninia mongolica and Caragana brachypoda in west Ordos to soil moisture [J]. Journal of Inner Mongolia University(Natural Science Edition), 2014,45(5):520-525.
ZhouZhiyu, LiFengrui, ChenYaming, et al. Growth and reproduction and their relationships with soil moisture in artificially established Artemisia sphaerocephala populations of different densities in the Alxa Desert [J]. Acta Ecologica Sinica, 2004,24(5):895-899.
ZhangYongming, GaoRunhong, JinHong. Studies on the ecological characteristics of four bushes roots in desert of west Erdos [J]. Journal of Inner Mongolia Agricultural University (Natural Science Edition), 2005,26(3):39-43.
LiuGuohou, HeXiao, TianJing, et al. The biological characters and protection of Potaninia mongolica [J]. Acta Botanica Boreali-Occidentalia Sinica, 2000,20(1):123-127.
[49]
XieChunping, LiuDawei, HuangChenyang, et al. Study on the intraspecific and interspecific competition of Pseudolarix amabilis in Changxing County, Zhejiang Province [J]. Polish Journal of Environmental Studies, 2021,30(4):3317-3325.
ZhangChengcheng, LinGuojiang, XuJiawen, et al. The intraspecific and interspecific competition of the endangered plant Sinomanglietia glauca [J]. Journal of Northeast Forestry University, 2024,52(12):40-45.
[52]
JiYingrui, ZhangPeng, ShenHailong. Competition intensity affects growing season nutrient dynamics in Korean pine trees and their microhabitat soil in mixed forest [J]. Forest Ecology and Management, 2023,539:121018.