| 施用改良剂对砂质土壤有机碳含量影响的整合分析 |
| 摘要点击 1844 全文点击 196 投稿时间：2024-01-13 修订日期：2024-03-14 |
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| 中文关键词 土壤改良剂 砂质土壤改良 土壤有机碳 土壤肥力 整合分析 |
| 英文关键词 soil amendment sandy soil improvement soil organic carbon soil fertility Meta-analysis |
| 作者 | 单位 | E-mail | | 刘天鸿 | 海南大学热带农林学院, 海口 570228
中国农业科学院农业资源与农业区划研究所, 北方干旱半干旱耕地高效利用全国重点实验室, 北京 100081 | liutianhong@hainanu.edu.cn | | 邬磊 | 中国农业科学院农业资源与农业区划研究所, 北方干旱半干旱耕地高效利用全国重点实验室, 北京 100081 | wulei01@caas.cn | | 梁飞 | 中国农业大学资源与环境学院, 北京 100193 | | | 王军 | 中国农业科学院农业资源与农业区划研究所, 北方干旱半干旱耕地高效利用全国重点实验室, 北京 100081 | | | 任科宇 | 中国农业科学院农业资源与农业区划研究所, 北方干旱半干旱耕地高效利用全国重点实验室, 北京 100081 | | | 徐明岗 | 中国农业科学院农业资源与农业区划研究所, 北方干旱半干旱耕地高效利用全国重点实验室, 北京 100081 | | | 汤水荣 | 海南大学热带农林学院, 海口 570228 | srtang@hainanu.edu.cn | | 张文菊 | 中国农业科学院农业资源与农业区划研究所, 北方干旱半干旱耕地高效利用全国重点实验室, 北京 100081 | |
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| 中文摘要 |
| 合理施用改良剂能有效促进贫瘠土壤有机碳（SOC）积累,提升土壤肥力. 不同类型改良剂施用对砂质土壤SOC含量的影响程度存在差异. 探讨改良剂施用对砂质土壤SOC含量的影响及其主要控制因素,可为砂质土壤肥力提升措施的制定提供科学依据. 搜集1987~2023年已公开发表的文献114篇,建立关于改良剂施用对砂质土壤SOC影响的相关数据617组. 采用数据整合分析方法（Meta-analysis）阐明改良剂种类及施用量、气候和土壤属性等因素下改良剂施用对砂质土壤SOC含量的影响,并通过回归分析和随机森林等统计分析方法解析改良剂施用后砂质土壤SOC变化的主控因素. 结果表明：①改良剂施用显著提高了砂质土壤SOC含量,平均提高幅度为61%,其中无机改良剂施用对砂质土壤SOC的提升幅度（161%）显著高于有机改良剂（37%）和复合改良剂（54%）；②无机改良剂施用量和持续时间对砂质土壤SOC提升幅度无显著影响；在有机改良剂中,砂质土壤SOC提升幅度随生物质炭和有机肥的施用量增加而增强,随改良剂施用的持续时间增加而降低；③气候条件、改良剂施用量、持续时间和土壤理化性质共同解释了砂质土壤SOC响应变异的88%. 改良剂施用引起的SOC含量变化幅度随着年均温度、土壤初始SOC含量和pH值的增加而显著降低,与干旱程度、土壤容重和含沙量显著正相关. 总体而言,施用改良剂显著提高了砂质土壤SOC含量,改良剂种类及施用量、气候条件和土壤初始性质调控砂质土壤SOC含量对改良剂的响应程度. 因此,在砂质土壤中施用改良剂时应综合考虑改良剂种类及施用量、气候条件和土壤性质,有效提高砂质土壤SOC含量和肥力水平. |
| 英文摘要 |
| Proper application of soil amendments can effectively increase the accumulation of soil organic carbon （SOC） in poor soils, thereby enhancing soil fertility level. The impacts of different types of amendments on the SOC content of sandy soils varies widely. Investigating the effects of various amendments on the SOC content of sandy soils and associated key controlling factors provides a scientific basis for formulating strategies to enhance the fertility of sandy soils. A data set was established with 617 pairs of data from 114 published studies that reported the effects of amendment application on SOC content of sandy soil during 1987 and 2023. Meta-analysis was used to quantitatively analyze the effects of amendment application on the SOC content of sandy soil globally under the conditions of various amendment types and application rates, climates, and soil properties. This study also investigated the major controlling factors for the changes in SOC in sandy soil after amendment application using regression analysis and random forest model. The research results showed that： ① Amendment application significantly increased SOC content by 61% on average in sandy soils and the application of inorganic amendment increased SOC in sandy soils （161%） to a significantly greater extent than that of organic amendment （37%） and compound amendment （54%）. ② The application amount and duration of inorganic amendments had no significant effect on the increase of SOC in sandy soil. Among the organic amendments, the increase of SOC in sandy soil was enhanced with the increase in the application amount of biomass carbon and organic fertilizer and decreased with the application duration of the amendment. ③ Climatic conditions, the amount and duration of amendments, and soil physicochemical properties combined explained 88% of the variability in SOC response in sandy soils. The magnitudes of SOC change due to amendment application significantly decreased with increased average annual temperature, initial SOC content, and soil pH, however, positively correlated with aridity, soil bulk density, and sand content. The application of amendments significantly increased SOC content in sandy soils. The type and application amounts of amendments, climatic conditions, and soil properties strongly regulated SOC in response to amendments. Therefore, the type and amounts of amendment, climate, and soil conditions should be comprehensively considered when applying amendments to effectively increase the organic carbon content and fertility level of sandy soils. |
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