Influence of the variables involved in the planting of rice in the rice husk ash’s characteristics

Abstract Rice production in Brazil in 2008 was approximately 12 million tons, and to achieve that amount several planting techniques were used with different strains of rice in different rice-growing areas. Since Rice Husk Ash (RHA) is the pozzolan of vegetable origin that is most studied by researchers working in the field of pozzolanic materials, this paper evaluates the influence that the form of planting, climate, soil, strain of rice and the origin/amount of nitrogen-based fertilizers used in rice cultivation have on the chemical composition and crystallographic properties of RHA. The results obtained in this study confirm the importance of carrying out routine chemical analysis and X-Ray diffraction to maintain the quality control of the CCAs produced because in situations of large-scale production, husks of different origins may be used.摘要：2008年巴西水稻产量约为1200万吨，为达成该产量目标，不同稻作区域搭配使用多种种植技术与不同水稻品系。稻壳灰（Rice Husk Ash, RHA）是火山灰材料领域研究者研究最为广泛的植物源性火山灰材料，本文针对水稻种植过程中的种植模式、气候、土壤、水稻品系以及氮肥来源与施用量对稻壳灰的化学成分与晶体学特性的影响开展评估。本研究所得结果证实，开展常规化学成分分析与X射线衍射（X-Ray Diffraction）以把控所制备稻壳灰的质量至关重要，因为大规模生产场景中可能会采用不同来源的稻壳。