辽宁省水稻土供硅能力及硅肥肥效的研究

辽宁不同类型水稻土供硅能力及硅肥肥效试验结果表明 ,采用pH4醋酸缓冲液法测定的土壤有效硅含量能够反映非碱性水稻土的硅素肥力水平 ,但不能够反映碱性水稻土的硅素肥力水平 ,碱性水稻土测定结果高 ,但硅素肥力水平低。施用硅肥能够增加植株体内硅的含量 ,改善水稻的生长状况 ,提高水稻的产量 ,增产幅度最高可达 3 0 .1%。

Study on Silicon-supply Capacity and Efficiency of Siliceous Fertilizer in Paddy Soils in Liaoning Province

Summary:The results coming from studies on silicon-supply capacity and response of siliceous fertilization in paddy soils in Liaoning province were as follows: When used buffer solution of acetic acid-acetate sodium as extracting solution, the value of available silicon content could reflect the silicon fertility degree of paddy soils except alkaline paddy soil. Although the value of available silicon content in alkaline paddy soil was high, the silicon-supplying capacity was low. Silicon fertilizer application in paddy soil could increase the silicon content of rice plant, improve growth status of rice and enhance the yield of rice. The most enhanced ratio of rice was 30.1%.