干旱胁迫下枸溶性钾肥配施对烤烟土壤理化性质、微生物数量及根系生长的影响

发布时间：2018-05-20 11:55

本文选题：枸溶性钾肥 + 土壤　；参考：《核农学报》2016年12期

【摘要】：为探明枸溶性钾肥与硫酸钾肥配施对土壤改良和烤烟生长的影响,通过盆栽烟株进行干旱处理,研究枸溶性钾肥不同配施比例在干旱胁迫条件下对土壤理化性质(土壤容重、土壤孔隙度、土壤钾含量),土壤微生物(真菌、细菌、放线菌)活性以及根系生长(根系生物量、根系构型参数、根系活力)的影响。结果表明,施加枸溶性钾肥可使土壤容重降低、孔隙度增大、速效钾和缓效钾含量增加、微生物数量提高,促进烤烟根系生长。在正常水分调控下,以75%枸溶性钾肥+25%的硫酸钾肥的处理最佳;在干旱胁迫条件下,以50%枸溶性钾肥+50%硫酸钾的处理最佳。在烤烟实际生产中,建议在保水能力差的土壤或降雨量少的烟区配施枸溶性钾肥。本研究对改善植烟土壤和提高烟叶品质具有指导意义。
[Abstract]:In order to investigate the effect of combined application of citric soluble potassium fertilizer and potassium sulfate fertilizer on soil improvement and growth of flue-cured tobacco, the physicochemical properties (soil bulk density) of soil under drought stress were studied under drought stress. Effects of soil porosity, soil potassium content, soil microbial activity (fungi, bacteria, actinomycetes) and root growth (root biomass, root configuration parameters, root activity). The results showed that the application of citric soluble potassium fertilizer could decrease soil bulk density, increase porosity, increase the content of available potassium and slow available potassium, increase the number of microorganisms, and promote the growth of root system of flue-cured tobacco. Under normal water control, 75% citric soluble potassium fertilizer 25% potassium sulfate fertilizer is the best treatment, and 50% soluble potassium fertilizer 50% potassium citrate sulfate treatment is the best under drought stress condition. In the actual production of flue-cured tobacco, it is suggested to apply citric soluble potassium fertilizer in the soil with poor water holding capacity or in the tobacco area with less rainfall. This study has guiding significance for improving tobacco planting soil and tobacco leaf quality.
【作者单位】：湖南农业大学烟草研究院;湖南农业大学生物科学技术学院;广西中烟工业有限责任公司;
【基金】：湖南省研究生科研创新项目(CX2015B238) 广西中烟工业有限责任公司“烟叶增钾关键技术研究与集成示范”项目
【分类号】：S143.3

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