辽宁省水稻生产中硅肥施用技术的研究 Ⅰ钢渣硅肥的施用技术

Si Fertilization Technique for Rice Production in Liaoning Province Ⅰ Slag-fertilization Technique

探讨了田间条件下钢渣硅肥的用量和施用方法。结果表明:供试土壤的水浸态硅含量低于85mgkg-1,施用钢渣硅肥能够显著提高水稻的产量;依据产量和肥料用量关系的效应方程,除康平地区的碱性水稻土外,供试的其它地区比较合理的钢渣施用量为1500kghm-2;钢渣硅肥可明显提高水稻植株体内SiO2含量,根据水稻植株体内SiO2含量随钢渣硅肥施入量的变化情况,沈阳市康平县最佳的施入量也应为1500kghm-2,钢渣基施更有利于水稻对SiO2吸收和利用;钢渣硅肥对土壤pH值影响不大,钢渣硅肥具有一定的后效。

A field experiment was conducted to investigate slag-fertilization technique for rice Production. Slag-fertilizer could increase the yield of rice and SiO_2 content in rice significantly because the SiO_2 content extracted by water from paddy soils was under 85(mg kg^(-1)). Based on the functional relations between slag-fertilization rate and yield of rice and the SiO_2 content in rice, the rational slag-fertilization rate was 1500kg hm^(-2). Slag base fertilization was beneficial for rice to SiO_2 uptake. The effect of slag fertilization on pH of soils was insignificant, and slag fertilization could affect rice growth positively in next growing cropping season.