农业环境科学学报2012，Vol.31Issue(4)：757-763,7.
酸性和中性水田土壤施用硅肥的效应研究Ⅰ.对土壤pH、Eh及硅动态的影响
Effect of Silicon Fertilizer in Acid and Neutral Paddy Field Soils I.Effect on Dynamic Changes of pH, Eh and Si in Soil Solution
摘要
Abstract
Pot experiments were conducted to study the effects of silicon fertilizer on the dynamic changes of pH, Eh, silicon concentrations in soil solutions of acid and neutral paddy field soils in northern China during the growth stages of rice. The mechanisms of different types of silicon fertilizer on improving soil silicon supplying ability were investigated. The results showed that pH value increased in acid soil, however it decreased in neutral soil, and finally both approached to neutral pH. The pH value of soil solutions in the treatments with blast furnace slag or mixture of blast furnace slag and glucose increased obviously in acid paddy field soil, while the increase of pH was more pronounced in the treatment with sodium metasilicate in neutral paddy field soil. The Eh of all treatments in the two types of soil decreased sharply firstly, and gradually reached the bottom, then increased rapidly to a peak after the water was drained away; when soil was drowned again, the Eh decreased to another bottom, and then increased slightly. The Eh varied greatly between acid and neutral soil. In acid paddy field soil, Eh increased in the treatments with blast furnace slag or sodium metsilicate, whereas it decreased in the treatment with glucose. The silicon concentration in soil solutions of all treatments increased to a peak, then decreased gradually, and stabilized at a constant value. The silicon concentration in soil solutions increased in the early growth stage of rice because of application of silicon fertilizer, and the increase was most obvious in the treatment with glucose or mixture of blast furnace slag with glucose. The silicon concentration in the treatment with sodium metasilicate was higher than that in the treatment with blast furnace slag in neural paddy field soil at early growth stage of rice; in the late growth stage of rice, the silicon concentration in the treatment with silicon fertilizer was higher than that in the treatment with glucose. In acid paddy field soil, the effects of blast furnace slag or mixture of blast furnace slag with glucose on silicon concentration was greater than that in the treatment with sodium metasilicate. In the whole growth stage of rice, mixed application with furnace slag and glucose increased the silicon concentration in the soil with the maximum increase rate. The silicon concentrations were 1.40 (the smallest multiple)～4.93(the largest multiple) time and 1.19 (the smallest multiple)～2.72 (the largest multiple) time higher in acid and neutral paddy soils respectively, compared to the untreated soil. Our study has shown that silicon fertilizers from blast furnace slag can improve the silicon-supplying capacity in the soil and increase the growth and yield of rice.关键词
水田土壤/土壤溶液/pH/Eh/硅/高炉渣Key words
paddy field soil/ soil solution/ pH/ Eh/ silicon/ blast furnace slag分类
农业科技引用本文复制引用
杨丹,刘鸣达,姜峰,张玉龙..酸性和中性水田土壤施用硅肥的效应研究Ⅰ.对土壤pH、Eh及硅动态的影响[J].农业环境科学学报,2012,31(4):757-763,7.基金项目
国家自然科学基金(40971175) （40971175）
辽宁省自然科学基金(20062114) （20062114）
