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【目的】在大棚条件下进行甘蔗硅肥施用量研究,阐明硅肥对甘蔗生长、营养以及土壤特性等的影响。【方法】以新台糖22号为试验材料,以每桶26gN+1.76gP+20gK为对照,设置T1～T6(20、40、60、80、120and150g/桶)6个不同硅肥用量,研究不同施硅水平对甘蔗的影响。【结果】硅肥处理的甘蔗+1叶N、P、Ca、Mg、Si含量较对照有一定提高,其中120g/桶处理的甘蔗+1叶含硅量比对照增加92%。不同施硅水平对甘蔗土壤理化性状具有显著影响,SOM和有效P较对照显著降低,120g/桶处理的有效Si含量较对照增加137%,150g/桶处理的交换性Ca和Mg分别较对照增加117.9%和86.0%,pH均有一定提高。硅肥处理对甘蔗株高和产量增加有显著影响,对甘蔗干物质和产糖量的提高也有促进作用,但不显著。【结论】硅肥对甘蔗生产以及土壤理化性状具有一定正效应,可结合常规施肥进一步推广从而提高甘蔗生产。
【Objective】 The research on the application rate of silicon fertilizer in sugarcane under greenhouse condition clarified the effect of silicon fertilizer on the growth, nutrition and soil characteristics of sugarcane. 【Method】 With Xintai No.22 as test material, six different silicon fertilizers T1 ~ T6 (20, 40, 60, 80, 120 and 150g / barrel) were set up with 26gN + 1.76gP + Effect of Silicon Application on Sugarcane. 【Result】 The contents of N, P, Ca, Mg and Si in sugarcane-treated leaves increased slightly compared with the control. The content of silicon in 120g / bbl + sugarcane increased by 92% compared with the control. The effect of different silicon fertilization on the physical and chemical properties of sugarcane soil was significantly affected. The content of SOM and effective P decreased significantly compared with the control. The effective Si content of 120g / barrel increased 137% compared with the control. The exchangeable Ca and Mg of 150g / 117.9% and 86.0% respectively. The pH value all increased to a certain extent. Silicate fertilizer had a significant effect on the plant height and yield of sugarcane, but also promoted the increase of dry matter and sugar yield of sugarcane, but it was not significant. 【Conclusion】 Silicate fertilizer has some positive effects on sugarcane production and soil physical and chemical properties, and can be further popularized with conventional fertilizers to improve sugar cane production.