Development of sustainable and environmentally sound rice production technology using slags, iron containing materials

利用矿渣、含铁材料开发可持续且无害环境的稻米生产技术

基本信息

批准号：
13660061
负责人：
ITO Toyoaki
金额：
$ 2.37万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

A field study was conducted to examine whether iron containing materials (ICM) composed of slags were effective in mitigating methane emission from paddy fields and increasing rice production. Addition of ICM (1kg m^<-2>) increased the grain yield of rice but could not alleviate methane emission for two years in paddy fields of 6 soils with different levels of easily reducible ferric iron and easily decomposable organic matter. All of the commercial ICM tested (10 materials) increased methane productions from a submerged paddy soil which was alluvial soil with low content of free iron oxide, compared with the soil without ICM. Increase of methane productions by addition of ICM was derived from the facts that ICM contained small amounts of reducible Iron oxide and stimulated organic matter decompositions by raising soil pH. The properties of ICM were improved by adding HCl. While two kinds of original ICM increased the grain yields of rice and methane emission from paddy fields, two kinds of altered ICM increased silicon contents of rice plant and the grain yields by 34-46 % and decreased methane emission by 10-41% compared with no addition of ICM. The improved ICM did not increased pH of the paddy soil and supplied large amounts of reducible iron oxide. That is the reason why the improved ICM alleviated methane emission from submerged paddy fields. It was concluded that the application of improved iron containing materials was effective option as a sustainable and environmentally sound rice production technology.

进行了一项现场研究，以检查含铁材料（ICM）是否有效缓解稻田的甲烷发射并增加水稻产量。 ICM的添加（1kg M^<-2>）增加了大米的谷物产量，但在6个土壤的帕迪田中无法减轻甲烷的排放，这些土壤具有不同水平的易于降低的铁铁和易于分解的有机物。与没有ICM的土壤相比，所有经过ICM测试的商业ICM（10材料）增加了淹没的稻田的甲烷生产，该土壤是冲积土壤，氧化含量低。通过添加ICM来增加甲烷生产的增加是从ICM含有少量可还原氧化铁和刺激有机物分解的事实中得出的。通过添加HCl来提高ICM的性能。虽然两种原始ICM增加了稻田中的水稻和甲烷发射的谷物产量，但两种改变的ICM增加了水稻植物的硅含量，而谷物的产量增加了34-46％，而没有添加ICM，甲烷排放量降低了10-41％。改进的ICM并未增加稻田的pH值，并提供了大量可还原氧化铁。这就是为什么改进的ICM减轻淹没稻田的甲烷排放的原因。得出的结论是，改进的含铁材料的应用是一种有效的选择，作为一种可持续且环保的水稻生产技术。