{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T14:06:41Z","timestamp":1788962801438,"version":"build-2803163510"},"reference-count":59,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T00:00:00Z","timestamp":1788912000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["42267048"],"award-info":[{"award-number":["42267048"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"award":["42267048"],"award-info":[{"award-number":["42267048"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Hainan Provincial Natural Science Foundation of China","award":["425RC688"],"award-info":[{"award-number":["425RC688"]}]},{"name":"Hainan Provincial Natural Science Foundation of China","award":["420RC532"],"award-info":[{"award-number":["420RC532"]}]},{"name":"Fund of Hainan University Training Program of Innovation and Entrepreneurship for Undergraduates","award":["S202510589031"],"award-info":[{"award-number":["S202510589031"]}]},{"name":"Fund of Hainan University Training Program of Innovation and Entrepreneurship for Undergraduates","award":["S202510589032"],"award-info":[{"award-number":["S202510589032"]}]},{"award":["S202510589031"],"award-info":[{"award-number":["S202510589031"]}],"id":[{"id":"https:\/\/ror.org\/03q648j11","id-type":"ROR","asserted-by":"publisher"}]},{"award":["S202510589032"],"award-info":[{"award-number":["S202510589032"]}],"id":[{"id":"https:\/\/ror.org\/03q648j11","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Plants"],"abstract":"<jats:p>Studying the relationships between understory plant diversity and soil physicochemical properties aids in understanding the sustainable development of plantation forests. Vegetation restoration in latosol gully erosion areas plays a key role in preventing soil erosion. Variations in understory plant diversity and soil physicochemical properties in areas that have undergone vegetation restoration subsequent to gully erosion are not well understood. In this study, we investigated the understory species composition, importance values, plant diversity, and soil physicochemical properties and explored their correlations following vegetation restoration using four forest types (Acacia mangium forest, Eucalyptus robusta forest, A. mangium\u2013E. robusta mixed forest, and A. mangium\u2013E. robusta\u2013Schizostachyum pseudolima mixed forest) in the Mahuangling Watershed, Hainan Province. A total of 49 plant species belonging to 47 genera and 20 families were recorded. The E. robusta forest (31 species) and A. mangium\u2013E. robusta mixed forest (27 species) had higher species richness and more complex community structures. The dominant shrub species were Rhodomyrtus tomentosa, Breynia fruticosa, Aporosa dioica, and Dodonaea viscosa, while the dominant herbaceous species were Ageratum conyzoides, Chromolaena odorata, Spermacoce alata, and Erigeron sumatrensis. In all four vegetation restoration forest types, the richness index in the herbaceous layer was higher than in the shrub layer, while the diversity index showed no significant difference between the shrub and herbaceous layers (p &gt; 0.05). The soil bulk density ranged from 1.57 g\u00b7cm\u22123 to 1.63 g\u00b7cm\u22123, with the A. mangium forest having better soil total porosity (38.77%) and water-holding capacity (190.37 t\u00b7hm\u22122) than the other forests. NH4+-N and NO3\u2212-N were lower in the E. robusta forest, while the A. mangium forest had significantly higher organic matter content (13.71 g\u00b7kg\u22121). Correlation and redundancy analyses showed that soil water content, pH, and soil organic matter were key factors affecting herbaceous-layer and shrub-layer plant diversity. On the whole, we suggest that the planting of pure and mixed forests of A. mangium should be considered in future ecological restoration projects in the gully erosion area of Mahuangling in order to maintain the stability of understory plant diversity and improve latosol soil fertility.<\/jats:p>","DOI":"10.3390\/plants15182760","type":"journal-article","created":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T12:26:11Z","timestamp":1788956771000},"page":"2760","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Relationship Between Understory Plant Diversity and Soil Physicochemical Properties in Four Vegetation Restoration Forest Types in the Latosol Gully Erosion Area on Hainan Island"],"prefix":"10.3390","volume":"15","author":[{"given":"Yanping","family":"Huang","sequence":"first","affiliation":[{"name":"School of Ecology, Hainan University, Haikou 570228, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"given":"Yihan","family":"Zhao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China"},{"name":"Engineering Research Center of Rare and Precious Tree Species in Hainan Province, Haikou 570228, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"}]},{"given":"Ruowen","family":"Mao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China"},{"name":"Engineering Research Center of Rare and Precious Tree Species in Hainan Province, Haikou 570228, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"}]},{"given":"Liangying","family":"Wu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China"},{"name":"Engineering Research Center of Rare and Precious Tree Species in Hainan Province, Haikou 570228, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"}]},{"given":"Yuxian","family":"Shen","sequence":"additional","affiliation":[{"name":"Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China"},{"name":"Engineering Research Center of Rare and Precious Tree Species in Hainan Province, Haikou 570228, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"}]},{"given":"Yijun","family":"An","sequence":"additional","affiliation":[{"name":"Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China"},{"name":"Engineering Research Center of Rare and Precious Tree Species in Hainan Province, Haikou 570228, 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