文章摘要
郭峻泓,娄运生,邢钰媛,王坤,刘健.生物炭配施硅肥对夜间增温稻田碳排放强度的影响[J].农业环境科学学报,2024,43(6):1421-1434.
生物炭配施硅肥对夜间增温稻田碳排放强度的影响
Effects of biochar combined with silicate fertilization on carbon emission intensity in a rice field under nighttime warming
投稿时间:2023-08-28  
DOI:10.11654/jaes.2023-0698
中文关键词: 夜间增温  生物炭  硅肥  水稻  碳排放强度
英文关键词: nighttime warming  biochar  silicate  rice  carbon emission intensity
基金项目:国家自然科学基金项目(41875177)
作者单位E-mail
郭峻泓 南京信息工程大学江苏省农业气象重点实验室, 南京 210044
南京信息工程大学生态与应用气象学院, 南京 210044 
 
娄运生 南京信息工程大学江苏省农业气象重点实验室, 南京 210044
南京信息工程大学生态与应用气象学院, 南京 210044 
yslou@nuist.edu.cn 
邢钰媛 江苏省镇江市丹徒区气象局, 江苏 镇江 212000  
王坤 南京信息工程大学生态与应用气象学院, 南京 210044  
刘健 南京信息工程大学生态与应用气象学院, 南京 210044  
摘要点击次数: 244
全文下载次数: 136
中文摘要:
      为了研究生物炭配施硅肥对夜间增温稻田水稻产量及温室气体排放(CH4和N2O)的影响,2019—2020年连续两年进行田间模拟增温试验。采用3因素3水平正交试验设计:夜间增温设3水平,用铝箔反光膜夜间(19:00—6:00)覆盖水稻冠层模拟夜间增温,即W0(常温对照,不覆盖)、W1(覆盖5 mm铝箔膜)和W2(覆盖11 mm铝箔膜);生物炭用量设3水平,即B0(对照,0)、B1(7.5t·hm-2)和B2(17.5 t·hm-2);硅肥种类设3水平,即Si0(对照,不施硅)、Si1(钢渣)和Si2(矿粉),Si1和Si2的用量(以SiO2计)均为200kg·hm-2。结果表明:2019年5 cm和10 cm稻田土层夜间均温分别增加0.3~1.0 ℃和0.2~0.7 ℃;2020年水稻植株冠层和株高中部夜间均温分别增加0.1~0.2 ℃和0.2~0.3 ℃。稻田CH4排放通量呈单峰型变化趋势,排放通量最大值和累积排放量出现于分蘖-拔节期;稻田N2O排放通量呈多峰型变化趋势。夜间增温处理的CH4和N2O累积排放量低于常温对照,生物炭配施硅肥可一定程度抑制CH4排放,但促进N2O排放。CH4对稻田总增温潜势的贡献起主导作用,占比大于84%。夜间增温明显降低水稻产量和温室气体累积排放量,生物炭可有效缓解夜间增温对水稻产量的不利影响,配施钢渣可降低总增温潜势和排放强度。综合考虑水稻产量和稻田减排,江苏沿江同类稻田水稻低碳生产应对气候变暖的技术措施为施用生物炭17.5 t·hm-2并配施钢渣(以SiO2计)200 kg·hm-2
英文摘要:
      In order to better understand the effects of biochar combined with silicate fertilizer on rice yield and greenhouse gas emissions (CH4 and N2O)in paddy fields under nighttime warming, field simulation experiments were conducted in two consecutive years(2019 to 2020)at the Agrometeorological Station, Nanjing, China. An orthogonal experimental design with three factors and three levels was adopted in this study. The three factors were nighttime warming, biochar application, and silicate application. The rice canopy was covered with aluminum foil reflective film at night(19:00—6:00)to simulate nighttime warming. The nighttime warming was set at three levels: control, ambient temperature, no film covering(W0), covering with 5 mm film(W1), and covering with 11 mm film(W2). The biochar application was set at three levels:control(B0), 7.5 t · hm-(2 B1), and 17.5 t · hm-(2 B2). The silicate application was of three types:no silicate application(control, Si0)and steel slag(Si1)or ore powder(Si2), at an application rate of 200 kg· hm-(2 calculated by SiO2). In 2019, the results showed that the average nighttime temperature of the 5-and 10-cm soil layer increased by 0.3-1.0 ℃ and 0.2-0.7 ℃, respectively. In 2020, the average nighttime temperature of the canopy and middle parts of the rice plants increased by 0.1-0.2 ℃ and 0.2-0.3 ℃, respectively. The CH4 emission flux from the rice field changed with single peak trend, with the peak and the highest cumulative emission occurring during the tillering-jointing period. The N2O emission flux from the rice field varied, showing a multi-peak trend. The cumulative emissions of CH4 and N2O under nighttime warming were lower than the corresponding values under ambient temperature (control). Biochar application combined with silicate fertilizer inhibited CH4 emission but promoted N2O emission in the paddy field. CH4 emission played a dominant role in contributing to the total sustained-flux global warming potential(SGWP), accounting for more than 84% of SGWP in the paddy field. Nighttime warming significantly reduced both rice yield and cumulative greenhouse gas emissions. Biochar application effectively alleviated the adverse effects of nighttime warming on the yield. The application of steel slag reduced the total SGWP and greenhouse gas emission intensity. In terms of rice yield and carbon emission reduction, the results of this study suggest that, in order to maintain rice production with low carbon emissions, application of biochar of 17.5 t·hm-2 and steel slag of 200 kg·hm-(2 calculated by SiO2)is recommended in the southern region of Jiangsu, China.
HTML    查看全文   查看/发表评论  下载PDF阅读器