文献类型：期刊文献

英文题名：Soil Comprehensive Fertility Changes in Response to Stand Age and Initial Planting Density of Long-Term Spacing Trials of Chinese Fir Plantations

作者：Sun, He[1] Lei, Jie[2,3] Liu, Juanjuan[2,3] Zhang, Xiongqing[2,3] Yuan, Deyi[1] Duan, Aiguo[2,3] Zhang, Jianguo[1,2,3]

第一作者：Sun, He

通信作者：Zhang, JG[1];Duan, AG[2];Zhang, JG[2];Duan, AG[3];Zhang, JG[3]

机构：[1]Cent South Univ Forestry & Technol, Coll Forestry, Changsha 410004, Peoples R China;[2]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Res Inst Forestry, Natl Forestry & Grassland Adm, Beijing 100091, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, Natl Forestry & Grassland Adm, Beijing 100091, Peoples R China

年份：2025

卷号：16

期号：2

外文期刊名：FORESTS

收录：;EI(收录号：20250917961255);Scopus(收录号：2-s2.0-85218643151);WOS:【SCI-EXPANDED(收录号:WOS:001430986200001)】；

基金：This research was funded by the Research Topics under the National Key Research and Development Program of China (NO. 2023YFF1304402-02) and the National Natural Science Foundation of China (NO. 32271862).

语种：英文

外文关键词：Chinese fir plantations; soil comprehensive fertility index; Nemerow index; stand age; initial planting density

摘要：The growing demand for wood products and ecosystem services in Chinese fir plantations has led to longer rotation ages and density control practices, raising concerns about their impact on soil fertility. This study assessed soil fertility of Chinese fir plantations in Fujian, Jiangxi, and Sichuan Provinces using the Nemerow index. The effects of stand age and initial planting density on soil fertility were analyzed using statistical models. In Fujian and Jiangxi, soil fertility was significantly higher at 11 and 30 years than at 5 and 25 years, while in Sichuan, it was higher at 25 and 30 years than at 5 and 11 years. In Fujian, soil fertility was higher at 6667 trees ha-2 than at 1667 trees ha-2. No significant differences were observed in Jiangxi, while in Sichuan, soil fertility at 6667 trees ha-2 was significantly higher than at 5000 and 1667 trees ha-2, and soil fertility at 10,000 trees ha-2 exceeded that at 1667 trees ha-2. Soil fertility typically increased with stand age, especially in Fujian and Sichuan. Soil fertility also increased with initial planting density, especially in Jiangxi and Sichuan. A structural equation model (SEM) explained 88% of the variance in soil fertility, with stand age directly affecting soil fertility and soil organic matter mediating the effects of stand age and planting density. These findings suggest that adjusting rotation age and planting density could help improve soil fertility, offering practical implications for sustainable forest management in Chinese fir plantations.