沿黄稻区水稻施用硅肥增产机理初探

Effects of Silocate Fertilization on Rice in the Rice Areas along Yellow River

９９４—１９９５年在田间条件下对水稻施用硅肥的增产机理进行了研究。结果表明，施用硅肥有较明显的增产效应。其机理为：施硅能促进水稻根系发育，提高根系二价铁离子的氧化力和根系还原力；增加茎秆充实度，有利于耐肥抗倒和提高抗纹枯病能力；改善冠层叶片的直立性，延长叶片光合功能持续时间，延缓叶片衰老速度并提高光合速率；增加抽穗至成熟期的干物质积累量。

The production increasing mechanism of silicate fertilization on rice were studied in the field in 1994—1995. The results show that silicate fertilization can increase the rice root development and activity,and stem substantial degree and thickness of mechanical tissue improve the lodging and disease resistant ability,and the upper leaf growth state,prolong the leaf area duration, delay senescence of low leaf,increase the higher photosynthetic rate and more dry matter accumulation from heading stage to maturing stage.