The experiment was carried out to study the relationship between the rice yield components and the yield in the organic rice production environment of integrated rice-duck farming,adopted no-tillage and light harrow technology.The results revealed that the yield of organic cultivation rice was mainly determined by the following four Characters:panicles per hill,grains per panicle,protein level of the whole plant and plant height.In the integrated rice-duck farming system,grains per panicle was significantly increased,as panicles per hill increased and duck population increased.The increase of whole plant protein level also physiologically demonstrated that nitrogen utilization efficiency was raised.In the system,the duck excrement could improve soil fertility,meanwhile,the fertilizer use efficiency was increased by the duck activities in the paddy,thus biomass and economic yield of rice improved.