| Effects of ecological transition patterns on the distribution of soil aggregates and organic carbon in jujube economic forest in Lvliang Mountain |
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| DOI：10.7606/j.issn.1000-7601.2024.02.10 |
| Key Words: jujube economic forest ecological transformation model soil organic carbon soil aggregate Lvliang Mountain |
| Author Name | Affiliation | | WANG Hui | College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | SUN Lin | College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | LI Jiaqi | College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | MU Chunheng | College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | FAN Wenhua | College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | YIN Haishan | College of Agricultural Economics and Management, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | WANG Gailing | College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China |
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| Abstract: |
| In order to investigate effects of ecological transition patterns on the distribution of soil aggregates and organic carbon in jujube economic forest in Lvliang Mountain, five ecological transformation modes were selected, namely jujube forest abandoned farmland (AF), jujube forest replanting with Astragalus\|Bupleurum (MM), replanting with alfalfa (AL), replanting with Chinese pine (CP), replanting with Platycladus orientalis (PO), and jujube forest under clear\|cutting operation was used as the control (CK). The stability of soil aggregates in 0~20 cm soil layer, the organic carbon content of soil and the organic carbon content of soil aggregates in 0~20 cm soil layer were assessed. The results showed that: (1) Except for AF model, other ecological models increased the ratios of >2.0 mm aggregates and >0.25 mm aggregates by 3.75%~9.31% and 1.68%~10.36%, respectively. Mean weight diameter and geometric mean diameter were increased by 0.05~0.19 mm and 0.03~0.10 mm, CP treatment performed best. (2) All ecological patterns significantly increased soil organic carbon content by 0.24~4.72 g·kg-1, the increase rate was 9.25%~182.10%， and increased the organic carbon content of soil aggregates of all grain sizes. (3) The contributions of soil organic carbon were mainly from >0.25 mm aggregates, which were increased by 4.20%~22.96% in all ecological models. (4) The organic carbon content of soil and >0.25 mm soil aggregates were significantly positive correlated with soil aggregate stability parameters. Soil organic carbon content, >0.25 mm soil aggregates organic carbon content and soil aggregate stability parameters in the Chinese pine model were the highest in all ecological transformation modes in Lvliang Mountain. |
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