Construction of environmental restoration and forage rice production system basing on resources recycling

本研究以饲用稻谷为“环境材料”，构建基于合理氮素循环的区域循环物质生产与环境修复体系，对饲草稻谷对厌氧消化液、营养污染河水和牛粪的脱氮效果进行了评价。建立了饲草稻田氮素去除模型和流域水量平衡模型，并对具有20多年饲用稻米生产历史的崎玉县熊谷市门埃美拉区增加岛进行了调查，以评价饲草水稻循环物质生产系统的可持续性。系统建设和进一步的经济评价对推广饲用水稻和维持稳定生产具有重要意义。

In the present study, to construct the system of circulation material production and environmental restoration basing on appropriate nitrogen cycling in the region by using the forage rice as "Environmental material", the nitrogen removal efficiency of anaerobic digestion slurry, nutrient polluted river water, and liquid cattle waste by forage rice were evaluated. Moreover, the model of the nitrogen removal by forage rice field and the water balance model of watershed size were constructed.In addition, to evaluate the sustainability of circulation material production system using forage rice, the survey was done at the Zengajima, Menuma district of Kumagaya city, Saitama prefecture, where forage rice has been producing over 20 years. The system construction and further economic evaluation are important for the spread of forage rice and maintenance of stable production.