Trophic interactions in the soil of rice-rice and rice-maize cropping systems

稻-稻和稻-玉米种植系统土壤中的营养相互作用

• 批准号: 194674208
• 负责人: Professor Dr. Volkmar Wolters
• 金额: --
• 依托单位: ArbeitsgruppeTierökologie
• 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 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/194674208?language=en
• 关键词: Trophic; interactions; soil; rice; maize

Subproject 3 will investigate the effect of shifting from continuously flooded rice cropping to crop rotation (including non-flooded systems) and diversified crops on the soil fauna communities and associated ecosystem functions. In both flooded and non-flooded systems, functional groups with a major impact on soil functions will be identified and their response to changing management regimes as well as their re-colonization capability after crop rotation will be quantified. Soil functions corresponding to specific functional groups, i.e. biogenic structural damage of the puddle layer, water loss and nutrient leaching, will be determined by correlating soil fauna data with soil service data of SP4, SP5 and SP7 and with data collected within this subproject (SP3). In addition to the field data acquired directly at the IRRI, microcosm experiments covering the broader range of environmental conditions expected under future climate conditions will be set up to determine the compositional and functional robustness of major components of the local soil fauna. Food webs will be modeled based on the soil animal data available to gain a thorough understanding of i) the factors shaping biological communities in rice cropping systems, and ii) C- and N-flow mediated by soil communities in rice fields. Advanced statistical modeling for quantification of species – environment relationships integrating all data subsets will specify the impact of crop diversification in rice agro-ecosystems on soil biota and on the related ecosystem services.

分项目3将调查从连续淹水的水稻种植转向轮作（包括非淹水系统）和多样化作物对土壤动物群落和相关生态系统功能的影响。在淹水和非淹水系统中，将确定对土壤功能有重大影响的功能组，并量化它们对不断变化的管理制度的反应以及作物轮作后的再定植能力。将通过将土壤动物数据与次级方案4、次级方案5和次级方案7的土壤服务数据以及在该次级项目（次级方案3）内收集的数据相关联，确定与特定功能组相对应的土壤功能，即水坑层的生物结构损害、水分流失和养分沥滤。除了直接在IRRI获得的实地数据外，还将建立涵盖未来气候条件下预期的更广泛环境条件的微观实验，以确定当地土壤动物主要组成部分的组成和功能稳健性。食物网将基于土壤动物数据进行建模，以深入了解i）水稻种植系统中生物群落的形成因素，以及ii）稻田土壤群落介导的C-和N-流。整合所有数据子集的物种-环境关系量化的先进统计建模将详细说明水稻农业生态系统中作物多样化对土壤生物群和相关生态系统服务的影响。