Greenhouse Gas Emission of Different Crop Rotations of Rice (flooded and non-flooded) and Maize

水稻（水淹和非水淹）和玉米不同轮作的温室气体排放

• 批准号: 194675260
• 负责人: Privatdozent Dr. Ralf Kiese
• 金额: --
• 依托单位: Department Atmosphärische Umweltforschung (IMK-IFU)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/194675260?language=en
• 关键词: Greenhouse; Gas; Emission; Different; Crop

This subproject will assess net-fluxes of CH4 and N2O as well as soil CO2 emissions from flooded and non-flooded rice as well as maize grown in different rotations and under different management practices. SP5 will encompass two research tasks, (i) automated chamber measurements and (ii) soil gas concentration measurements of different crop rotations. In total 36 automated chambers will be placed in two large field blocks (18 chambers each) divided into fields representing three crop-rotations: R-WET (rice flooded - rice flooded), R-MIX (rice flooded – rice non-flooded), M-MIX (maize - rice flooded) experiencing three differ-ent crop management practices: a control with no fertilizer application (zero-N), site specific nutrient management (site-spec) and conventional fertilizer application (conv). In the fields of conventional fertilization SP5 will also conduct soil concentration measurements of CO2, N2O and CH4 for identification of the main production and/ or consumption horizons which may differ between the three crop rotation systems which will allow identification of the dominating processes responsible for GHG exchange with the atmosphere. Emissions of different greenhouse gases together with data on biomass production/ yields (conducted by IRRI) will be aggregated to compile the total GHG exchange of different crop rotations and management practices. Thus, the data obtained in SP5 will create a sound basis for projecting the environmental consequences of different land use options in rice-based systems with respect to the net GHG exchange. Moreover, data obtained in SP5 will be linked in particular with results from C and N process studies of SP1-SP4 and will form a sound base for further development, testing and valida-tion of the process based model applied in SP6/ 7.

这个分项目将评估CH 4和N2 O的净通量以及淹水和非淹水水稻以及不同轮作和不同管理做法下种植的玉米的土壤CO2排放量。SP 5将包括两项研究任务，（i）自动化气室测量和（ii）不同作物轮作的土壤气体浓度测量。总共36个自动化室将被放置在两个大型现场区块中（每个18个室）分成代表三种作物轮作的田地：R-WET（水稻淹水-水稻淹水），R-MIX（水稻淹水-水稻非淹水），M-MIX（玉米-水稻淹水）经历三种不同的作物管理做法：不施肥（零N）、特定养分管理（site-specie）和常规施肥（conv）的对照。在常规施肥领域，SP 5还将进行CO2、N2 O和CH 4的土壤浓度测量，以确定三种作物轮作系统之间可能不同的主要生产和/或消费范围，这将有助于确定负责温室气体交换的主要过程与大气。不同温室气体的排放量以及生物量生产/产量数据（由IRRI进行）将被汇总，以汇编不同作物轮作和管理做法的温室气体总交换量。因此，次级方案5中获得的数据将为预测水稻种植系统中不同土地利用方案对温室气体净交换的环境影响奠定坚实的基础。 此外，在SP 5中获得的数据将特别与SP1-SP 4的碳和氮过程研究结果相联系，并将为进一步开发、测试和验证SP 6/ 7中应用的基于过程的模型奠定坚实的基础。