Establishment of water environmental purification system basing on resource cycle with forage rice

基于饲料稻资源循环的水环境净化系统的建立

基本信息

批准号：
17560484
负责人：
HOSOMI Masaaki
金额：
$ 2.18万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

In the laboratory experiment, the nitrogen removal efficiencies and the biomass production were compared between surface flow (SF) and vertical flow (VF) system. It is found that the nitrogen removal efficiencies in the VF systems were higher than those in SF systems both irrigated by synthetic river water and livestock wastewater. In addition, the nitrogen efficiencies planted with forage rice were higher than those without plant. The above-ground biomass of forage rice under the condition of VF irrigated by livestock wastewater was the highest, achieved 3.0 kg dry weight m^<-2>. The nitrogen contents assimilated by above-ground biomass were about 80% of the entirely nitrogen content under VF systems and 90% under SF system.On the other hand, compared with the concentrations of Estrone(E1) (10μg/L) and 17β-Estradiol(E2) (6.4μg/L) in the influent, those in the effluent were lower than 2.0μg/L, suggesting that 80% and 69% of these two kinds of Endocrine-disrupting compound were removed by VF systems with forage rice.We investigated nitrogen removal performance and behavior in the field planted with forage rice and irrigated by nutrient polluted river water. The average nitrogen removal rate was 175 mg m^<-2> d^<-1>. Most of the nitrogen taken up by rice plants was contained in the aboveground biomass, with the mean amount being 34 g N m^<-2>. Since forage rice containing nitrogen could be supplied to livestock industry through Whole-Crop Silage, The results indicate wetland system using forage rice are useful in reduction of nitrogen loading to the environment as well as increase of feed self-sufficiency rate in Japan.

在实验室实验中，比较了表面流量（SF）和垂直流（VF）系统之间的氮去除效率和生物量的产生。发现VF系统的氮去除效率高于合成河水和牲畜废水灌溉的SF系统中的氮。此外，用草料稻种植的氮效率高于没有植物的氮效率。在牲畜废水灌溉的VF状态下，草大米的地上生物量最高，达到3.0 kg干重M^<-2>。在VF系统下被地面生物量吸收的氮含量约为80％，在VF系统下完全是氮含量，而在SF系统下的氮含量为90％。另一方面，与雌酮（E1）（E1）（10μg/L）（10μg/l）和17β-雌二醇（E2）（E2）（E2）（E2）（E2）（E2）（6.4μg/l）相比，这些及其在3.0％中的影响较低。通过饲料米饭的VF系统去除了干扰内分泌的化合物。我们在种植的野生水稻中投资了氮的去除性能和行为，并被养分污染的河水灌溉。平均氮去除率为175 mg m^<-2> d^<-1>。大多数氮由水稻植物占用的氮都包含在地上生物量中，平均量为34 g n m^<-2>。由于可以通过全牛青块青贮饲料向牲畜行业提供含氮的饲料，因此结果表明，使用饲料大米的湿地系统可用于减少对环境的氮气负荷以及日本的饲料自给自足率的提高。