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| 硝化/脲酶抑制剂及生物质炭对养殖肥液灌溉土壤氮素转化的影响 |
| Effects of nitrification/urease inhibitors and biochar on nitrogen conversion in soil irrigated with digested slurry |
| 投稿时间：2019-03-05 |
| DOI：10.13254/j.jare.2019.0113 |
| 中文关键词: 养殖肥液，双氰胺，氢醌，生物质炭，土壤，氮素 |
| 英文关键词: digested slurry, dicyandiamide, hydroquinone, biochar, soil, nitrogen |
| 基金项目:国家重点研发计划（2017YFD0800403）；天津市自然科学基金（16JCYBJC29700）；农业农村部财政项目 |
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| 摘要点击次数: 2039 |
| 全文下载次数: 1974 |
| 中文摘要: |
| 化学氮肥添加硝化/脲酶抑制剂和生物质炭均可起到减少硝态氮淋溶损失或气态损失的作用。为研究以有机氮素和无机氮素复合系统的养殖肥液为主体的新型肥料对减少氮素损失的作用，在控制施氮量相同的前提下，通过设置不同种类的抑制剂和抑制剂组合方式：养殖肥液单施（CK）、尿素单施（U）、养殖肥液+双氰胺（DCD）、养殖肥液+氢醌（HQ）、养殖肥液+双氰胺+氢醌（DCD+HQ）、养殖肥液+生物质炭（B），探究硝化抑制剂、脲酶抑制剂单施或配施及生物质炭的添加对养殖肥液施用后土壤氮素转化的影响。结果表明，土壤N2O-N累积排放量抑制率呈现DCD+HQ > HQ > DCD > B，抑制率依次为21.97%、19.39%、18.55%和10.71%；土壤氮素矿化速率依次为DCD+HQ > DCD > HQ > B > CK > U；土壤氮素硝化速率由大到小依次为CK > HQ > B > DCD+HQ > DCD > U。研究表明，DCD+HQ抑制剂组合模式更加有利于防控养殖肥液灌溉过程土壤氮素的损失。 |
| 英文摘要: |
| The addition of nitrification/urease inhibitor or biochar to chemical nitrogen fertilizer can reduce nitrate leaching loss or gas loss, but the application of new fertilizers based on organic nitrogen and inorganic nitrogen compound systems to reduce nitrogen loss is relatively rare. In this study, different types of inhibitors and combinations of inhibitors were set under the premise of the same amount of nitrogen application:Single application of digested slurry (CK), single application of urea (U), digested slurry+dicyandiamide (DCD), digested slurry+hydroquinone (HQ), digested slurry+dicyandiamide+hydroquinone (DCD+HQ), and digested slurry+biochar (B) to explore the extent of nitrogen conversion in soil irrigated with digested slurry after nitrification/urease inhibitor or biochar application. The results showed that the cumulative emission inhibition rate of soil N2O-N was in the order DCD+HQ > HQ > DCD > B, and the inhibition rates were 21.97%, 19.39%, 18.55%, and 10.71%, respectively. The soil nitrogen mineralization rate was in the order DCD+HQ > DCD > HQ > B > CK > U, and the soil nitrogen nitrification rate from high to low was in the order CK > HQ > B > DCD+HQ > DCD > U. It is suggested that the combined model of DCD+HQ inhibitors is more conducive to preventing and controlling the loss of soil nitrogen in the process of digested slurry irrigation. |
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