| 魏欣悦,纪洋,马静,张广斌,徐华.控释肥与尿素配合施用对太湖流域麦季土壤N2O排放的影响[J].农业环境科学学报,2025,44(10):2698-2708. |
| 控释肥与尿素配合施用对太湖流域麦季土壤N2O排放的影响 |
| Impact of co-application of controlled-release fertilizer and urea on soil N2O emissions during the wheatgrowing season in the Taihu Lake basin |
| 投稿时间：2024-12-13 |
| DOI：10.11654/jaes.2024-1096 |
| 中文关键词: 控释肥 配施 N2O排放 产量 小麦 |
| 英文关键词: controlled-release fertilizer co-application N2O emission yield wheat |
| 基金项目:国家自然科学基金项目（42077043，42277332） |
| 作者 | 单位 | E-mail | | 魏欣悦 | 南京信息工程大学生态与应用气象学院, 农业与生态气象江苏省高校重点实验室, 中国气象局生态系统碳源汇开放重点实验室, 南京 210044 | | | 纪洋 | 南京信息工程大学生态与应用气象学院, 农业与生态气象江苏省高校重点实验室, 中国气象局生态系统碳源汇开放重点实验室, 南京 210044 | jiyang@nuist.edu.cn | | 马静 | 土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008 | | | 张广斌 | 土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008 | | | 徐华 | 土壤与农业可持续发展国家重点实验室, 中国科学院南京土壤研究所, 南京 210008 | |
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| 中文摘要: |
| 通过田间原位观测试验，采用密闭静态箱法探究控释肥不同施氮量（0、200、270 kg·hm-2）及其与尿素不同比例配施（尿素和控释肥配比为3∶7和1.5∶8.5）对太湖流域冬小麦种植体系N2O排放、土壤理化因子及水稻产量的影响，以筛选出太湖流域冬小麦种植体系N2O减排增效最佳的氮肥施用措施。结果表明：尿素与控释肥单施处理下，小麦生长季土壤N2O排放量、单位产量N2O排放量、小麦产量及秸秆生物量均随施氮量的增加而增加。200 kg·hm-2和270 kg·hm-2施氮量下，与尿素处理相比，控释肥显著降低小麦生长季土壤N2O排放量21.4%和86.1%，同时增加小麦产量21.6%和23.9%，进而降低单位产量N2O排放量。控释肥与尿素配施处理下，小麦生长季土壤N2O排放量、单位产量N2O排放量随控释肥添加比例的增加而降低，小麦产量和秸秆生物量均随控释肥添加比例的增加而增加。与尿素处理相比，尿素与控释肥配施比例为3∶7和1.5∶8.5的处理降低了小麦生长季土壤N2O排放量16.8%和29.0%，同时增加了小麦产量18.4%和19.8%，进而降低了单位产量N2O排放量，其中尿素和控释肥以1.5∶8.5的比例配施下单位产量N2O排放量最低。小麦生长季土壤N2O排放通量与土壤温度、NH+4-N浓度呈显著正相关关系，而与土壤充水孔隙度相关性不显著。研究表明，综合麦季N2O排放量和小麦产量，施氮量为200 kg·hm-2，尿素和控释肥配施比例为1.5∶8.5可作为太湖流域冬小麦种植体系控释肥的推荐施用方式。 |
| 英文摘要: |
| This study conducted field in situ observational experiments using closed static chambers to investigate the effects of different application rates of controlled-release fertilizer（0, 200, 270 kg · hm-2）and their co-application with urea at different ratios（urea to controlled-release fertilizer ratios of 3∶7 and 1.5∶8.5）on N2O emissions, soil physicochemical factors, and wheat yield in the winter wheat cropping system of the Taihu Lake basin. The objective was to identify the optimal nitrogen fertilizer application measures for N2O mitigation and yield enhancement in the winter wheat cropping system of the Taihu Lake basin. The results showed that under sole application treatments of urea and controlled-release fertilizers, soil N2O emissions, N2O emissions per unit yield, wheat yield, and straw biomass all increased with the increment of nitrogen application. At the same nitrogen application rate（200 kg·hm-2 and 270 kg·hm-2）, compared with urea treatment, controlled-release fertilizer significantly reduced soil N2O emission by 21.4% and 86.1% in the growing season of wheat, and increased wheat yield by 21.6% and 23.9%, which in turn reduced N2O emission per unit of yield. Under coapplication treatments（urea to controlled-release fertilizer ratios of 3∶7 and 1.5∶8.5）, soil N2O emissions and N2O emissions per unit yield during the wheat growing season decreased with the increased proportion of controlled-release fertilizers, while wheat yield and straw biomass increased. Compared to the urea treatment, different treatments of controlled-release fertilizer and urea reduced soil N2O emissions by 16.8% and 29.0% during the growing season, and increased wheat yield by 18.4% and 19.8%, which in turn reduced N2O emissions per unit of yield. The lowest N2O emissions per unit yield were observed when urea and controlled-release fertilizers were co-applied at a ratio of 1.5∶8.5. Soil N2O emission fluxes during the wheat growing season were significantly positively correlated with soil temperature and NH+4-N concentration, and not significantly correlated with soil water-filled pore space. Therefore, considering both N2O emissions and wheat yield, an application rate of 200 kg·hm-2, with urea and controlled-release fertilizers co-applied at a ratio of 1.5∶8.5, is recommended as an optimal application strategy for controlled-release fertilizers in the winter wheat cropping system of the Taihu Lake basin. |
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