| 耐盐水稻种植对滨海盐渍土壤有机碳库及碳转化酶活性的影响 |
| 摘要点击 483 全文点击 22 投稿时间：2024-11-09 修订日期：2025-03-31 |
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| 中文关键词 种植年限 碳组分 碳转化酶活性 碳库管理指数 Mantel检验 结构方程模型 |
| 英文关键词 cultivation years carbon component carbon conversion enzyme activity carbon pool management index Mantel test structure equation modeling |
| DOI 10.13227/j.hjkx.20260234 |
| 作者 | 单位 | E-mail | | 季若彤 | 浙江师范大学地理与环境科学学院, 金华 321004
中国-莫桑比克智慧农业"一带一路"联合实验室, 金华 321004 | jiruotong1018@163.com | | 解雪峰 | 浙江师范大学地理与环境科学学院, 金华 321004
中国-莫桑比克智慧农业"一带一路"联合实验室, 金华 321004 | xiexuefeng@zjnu.cn | | 贾振毅 | 浙江师范大学地理与环境科学学院, 金华 321004
中国-莫桑比克智慧农业"一带一路"联合实验室, 金华 321004 | | | Henrique Cambule Armindo | 中国-莫桑比克智慧农业"一带一路"联合实验室, 金华 321004
蒙德拉内大学农业与森林工程学院, 马普托257 | | | 缪源卿 | 江苏省海洋地质调查研究院, 南京 210028 | | | 徐梓晴 | 浙江师范大学地理与环境科学学院, 金华 321004 | | | 田再洋 | 浙江师范大学地理与环境科学学院, 金华 321004 | |
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| 中文摘要 |
| 耐盐水稻种植已成为滨海盐渍土改良的有效途径之一. 以未种植耐盐水稻的滨海盐碱地（CK）为对照，以不同耐盐水稻种植年限（1~5 a）土壤为研究对象，结合方差分析、冗余分析、蒙特卡洛置换检验、Mantel检验和结构方程模型，探究耐盐水稻种植下滨海盐渍土壤有机碳组分、碳库质量和碳转化酶活性的变化特征及其内在联系. 结果表明：①土壤有机碳含量在耐盐水稻种植2 a后持续上升；微生物量碳和易氧化有机碳含量分别在种植2 a和4 a达到最高值；不同种植年限间表层土壤颗粒有机碳含量并无显著性差异，底层土壤颗粒有机碳含量在种植5 a达到最高值；表层和底层土壤可溶性有机碳含量分别在种植2 a和4 a达到最高值. ②不同种植年限间土壤碳库活度并无显著性差异；表层土壤碳库活度指数在不同种植年限间并无显著性差异，底层土壤碳库活度指数在种植4 a达到最高值，较CK提升了84.4%；耐盐水稻种植2 a后碳库指数显著高于CK，而表层和底层土壤碳库管理指数分别在种植2 a和4 a达到最高值. ③表层土壤蔗糖酶和淀粉酶活性在种植2 a时达到最高值，较CK分别提升了341.2%和111.5%，底层土壤蔗糖酶和淀粉酶活性在不同种植年限间并无显著性差异；土壤β葡萄糖苷酶和多酚氧化酶活性分别在种植4 a时达到最高和最低值，和CK之间差异显著. ④土壤β-葡萄糖苷酶和多酚氧化酶活性分别是影响有机碳组分和碳库质量的关键环境因子. 耐盐水稻种植通过提升土壤养分和速效养分含量，激发水解酶类和氧化酶类活性，进而影响土壤有机碳组分，提升土壤碳库质量；此外，氧化酶类活性的增强同时削弱土壤碳库质量. 研究可为了解耐盐水稻种植下土壤有机碳固存机制和盐渍土壤管理提供科学依据. |
| 英文摘要 |
| Cultivating salt-tolerant rice （STR） is an effective approach to ameliorating coastal saline soils （CSL）. In this study， the CSL without STR cultivation served as the control （CK）， while soils with different rice cultivation years （1-5 years） were the research objects. The one-way analysis of variance， redundancy analysis， Monte Carlo permutation test， Mantel test， and structural equation modeling were applied to investigate the changes and internal connections of soil organic carbon components， carbon pool quality， and carbon-converting enzyme activity under STR cultivation in CSL. The results showed that： ① Soil organic carbon content continued to rise after 2 a of STR cultivation， and the contents of microbial biomass carbon and easily oxidized organic carbon reached their peak values at 2 a and 4 a of cultivation， respectively. No significant difference in particulate organic carbon content in surface soil was found among different cultivation years， whereas its content in subsurface soil peaked at 5 years of cultivation. The contents of dissolved organic carbon in the surface and subsurface soil reached the highest values at 2 a and 4 a of cultivation， respectively. ② There was no significant difference in soil carbon pool activity among different cultivation years. Similarly， no significant difference in the carbon pool activity index of surface soil existed among different cultivation years， but the carbon pool activity index of subsurface soil reached the highest value at 4 years of cultivation， which was 84.4% higher than that of CK. Moreover， the carbon pool index was significantly higher than that of CK after 2 a of STR cultivation， and the carbon pool management index of surface and subsurface soil reached the highest values at 2 a and 4a of cultivation， respectively. ③ The activities of sucrase and amylase in the surface soil reached the highest values at 2 a of cultivation， which were 341.2% and 111.5% higher than those of CK， respectively， and there was no significant difference in the activities of sucrase and amylase in the subsurface soil among different cultivation years. The activities of soil β-glucosidase and polyphenol oxidase reached the highest and lowest values at 4a of cultivation， respectively， and the differences between them and CK were significant. ④ The activities of soil β-glucosidase and polyphenol oxidase were the key environmental factors affecting organic carbon components and carbon pool quality. The cultivation of STR improved the content of soil nutrients and available nutrients and stimulated the activities of hydrolytic and oxidative enzymes， thereby affecting the components of soil organic carbon and improving the soil carbon pool quality. In addition， the enhancement of the oxidative enzyme activity also weakened the quality of the soil carbon pool. This study is expected to provide a scientific basis for understanding the mechanism of soil organic carbon sequestration and the management of CSL under the cultivation of STR. |
