枸溶性钾肥与硫酸钾配施对烤烟-土壤系统钾素平衡的影响

发布时间：2018-07-27 17:31

【摘要】：为探明枸溶性钾肥配施在烤烟栽培上的应用效果,通过连续种植2季烤烟的盆栽试验,研究了枸溶性钾肥与硫酸钾配施对烤烟生物量、钾素吸收量、烤烟-土壤系统钾素平衡以及土壤速效钾、缓效钾含量变化的影响。结果表明,枸溶性钾肥配施硫酸钾较单施硫酸钾显著提高2季烤烟生物量和钾素吸收量,以T3处理(75%枸溶性钾肥+25%硫酸钾)效果较好,其中钾素吸收总量比单施硫酸钾增加33.05%;枸溶性钾肥配施硫酸钾处理烤烟生长后期枸溶态钾的分解供应缓解了土壤钾素亏缺,维持土壤钾素平衡,有利于烤烟生长,其中T3处理钾素平衡系数为1.06,优于其他配施比例;2季烤烟收获后,枸溶性钾肥配施硫酸钾处理土壤速效钾和缓效钾含量均高于单施硫酸钾肥处理。因此,枸溶性钾肥配施硫酸钾能更好地补充土壤中的有效钾素,缓解土壤钾素不足,促进烤烟生长,建议烤烟生长连作时配施一定比例的枸溶性钾肥,尤以75%枸溶性钾肥+25%硫酸钾配施比例较好。
[Abstract]:In order to find out the effect of combined application of citric soluble potassium fertilizer on flue-cured tobacco cultivation, a pot experiment was conducted to study the effect of combined application of citric soluble potassium fertilizer and potassium sulfate on the biomass and potassium uptake of flue-cured tobacco. Effects of potassium balance in flue-cured tobacco-soil system and changes of soil available potassium and slow available potassium content. The results showed that the biomass and potassium uptake of flue-cured tobacco were significantly increased by applying citric soluble potassium fertilizer combined with potassium sulfate alone. The effect of T3 treatment (75% citric potassium fertilizer 25% potassium sulfate) was better than that of single application of potassium sulfate fertilizer. The total absorption of potassium was 33.05% higher than that of potassium sulfate alone, and the decomposition supply of citric soluble potassium fertilizer combined with potassium sulfate could alleviate the soil potassium deficit, maintain the balance of potassium in soil, and benefit the growth of flue-cured tobacco. The K balance coefficient of T3 treatment was 1.06, which was better than that of other treatments after harvest. The content of available potassium and slow available potassium in soil treated with citric soluble potassium fertilizer combined with potassium sulfate fertilizer was higher than that in single potassium sulfate fertilizer treatment. Therefore, the combination of citric soluble potassium fertilizer and potassium sulfate fertilizer can better supplement the available potassium in soil, alleviate the lack of potassium in soil and promote the growth of flue-cured tobacco. It is suggested that a certain proportion of citric soluble potassium fertilizer should be applied in the continuous cropping of flue-cured tobacco. In particular, 75% citric soluble potassium fertilizer with 25% potassium sulfate was applied in combination.
【作者单位】：贵州大学农学院;贵州省黔西南州烟草公司;湖南农业大学烟草研究院;
【基金】：黔西南州烟草公司应用推广项目(2015-6)
【分类号】：S572;S158.3

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