| 张莹,李小华,刘洪超,张雅璇,李兆阳,黄占斌.改良材料混施对富硒区土壤硒有效性的影响[J].农业环境科学学报,2026,45(4):990-999. |
| 改良材料混施对富硒区土壤硒有效性的影响 |
| Effects of improved material mixed application on selenium availability in selenium-rich soil |
| 投稿时间：2025-05-03 |
| DOI：10.11654/jaes.2025-0406 |
| 中文关键词: 富硒区土壤 有效硒 改良材料 正交试验 极差分析 |
| 英文关键词: selenium-rich soil available selenium soil amendments orthogonal test range analysis |
| 基金项目:河北华勘地质勘查有限公司科研项目：蓟州区富硒土壤改良技术方法及农作物适宜性研究 |
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| 中文摘要: |
| 针对富硒区土壤硒利用率较低、农作物达不到富硒标准等问题，采用模拟土培实验方法，筛选改良材料混合施用提高富硒区土壤硒利用效率的最优组合。采取天津蓟州区东二营镇富硒区表层土，利用高钙石（A）、钙镁磷肥（B）、复合腐植酸（C）、发酵有机质（D）等改良材料，通过四因素三水平正交试验设计，分析研究提升土壤硒利用效率的改良材料优化组合。结果表明：添加复合改良材料可有效改善土壤理化性质，其中pH维持在6.8~8.2，变化不明显，土壤容重降低，田间持水量、有机质、电导率（EC）、阳离子交换量（CEC）均有上升。随着培养时间延长，各处理土壤有效硒含量均有上升，60 d培养土壤有效硒含量较稳定。极差分析表明，培养60 d的土壤有效硒含量最高且较无材料添加的对照（CK）提高38.4%，对应的改良材料优化组合为A3B3C2D1（高钙石∶钙镁磷肥∶复合腐植酸∶发酵有机质的比例为1.8∶6∶6∶5）。 |
| 英文摘要: |
| In order to deal with the low utilization rate of selenium in selenium-rich soil and crops failing to meet selenium-rich standards, this study was used simulated soil pot culture experiments, and investigated the optimal combination of four soil amendments to improve the selenium utilization efficiency in selenium-rich areas. Taking the surface soil from selenium-rich area in Dongerying Town in Jizhou District, Tianjin, as an example, four amendments, limestone（A）, calcium magnesium phosphate fertilizer（B）, composite humic acid（C）, and fermented organic matter（D） were applied. A three-level orthogonal experimental design with four factors was used to analyze and determine the optimal combination of materials for enhancing soil selenium utilization efficiency. The results showed that the application of composite amendments improved the soil′s physical and chemical properties. Among these, the pH exhibited no significant change, remaining within the range of 6.8-8.2, while the soil bulk density decreased. The field water-holding capacity, organic matter content, electrical conductivity（EC）, and cation exchange capacity（CEC） increased. The content of available selenium in the soil also rose, with a stable increase observed over a 60-day incubation period and the most significant improvement was 38.4% high than that of no amendment material treatment（CK）. Through range analysis, the optimal combination for enhancing selenium utilization efficiency was determined to be A3B3C2D1（the ratio of high-calcium stone∶calcium-magnesium-phosphate fertilizer∶compound humic acid∶fermented organic matter is 1.8∶6∶6∶5） in the 60-day incubation results. |
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