中国农业科学2012，Vol.45Issue(22)：4635-4642,8.DOI:10.3864/j.issn.0578-1752.2012.22.009
不同浓度DMPP和DCD对石灰性土壤中氮素转化的影响
Effects of Different Application Rates of DMPP and DCD on Nitrogen Transformation in Calcareous Soil
摘要
Abstract
[Objective] A simulating experiment was carried out to study the effects of different concentrations of DMPP and DCD on nitrogen transformation in calcareous soil, and the best application rate was screened to provide references for agricultural practice. [Method] In the same incubation condition (soil moisture: 60% of water hold capacity, 25℃), the effects of different concentrations of DMPP (0.5%, 1%, 2.5% and 5% of applied pure N) and DCD (2.5%, 5%, 10% and 15% of applied pure N) on nitrogen forms in calcareous soil were compared. [Result] The results showed that compared to CK, the contents of soil ammonium nitrogen in DMPP and DCD treatments were higher, while nitrate and nitrite nitrogen concentrations were significantly lower. Application of DMPP and DCD could significantly (P<0.05) decrease the ammonium oxidation rate and the half-lives of NH4+ in soils increased from 3.6d in CK treatment to 14.1-17.1 d in DMPP treatments or 13.1-26.8 d in DCD treatments. No significant difference in the ammonia oxidation rates was observed in different DMPP treatments, however, the rates decreased with the rising of DCD concentrations. Among all nitrification inhibitor treatments, the minimum ammonia oxidation rate was found in 2.5% DCD treatment, while the maximum rate was observed in 15% DCD. The ammonia oxidation rates in DCD treatments (except 2.5% treatment) were higher than those in DMPP treatments. [Conclusion] Application of DMPP and DCD could inhibit the oxidation of ammonium. No significant difference was observed in DMPP treatments, whereas an evident dose-effect relationship was found in DCD treatments. No significant difference was found between 5% DCD treatment and DMPP treatments (P<0.05). As a result, the recommended DMPP and DCD rate in carcalous soil was 0.5% and 5% of pure nitrogen, respectively.关键词
硝化抑制剂/氨氧化速率/DMPP/DCDKey words
nitrification inhibitor/ NH4+ oxidation rate/ DMPP/ DCD引用本文复制引用
石美,梁东丽,满楠,郭璐,赵文龙,王朝辉..不同浓度DMPP和DCD对石灰性土壤中氮素转化的影响[J].中国农业科学,2012,45(22):4635-4642,8.基金项目
农业部小麦现代农业产业技术体系"有害物质监控"项目资助 （）
