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作 者 ：张彦才;周晓芬;李巧云;翟彩霞;刘全清

期 刊 ：植物营养与肥料学报 2006年 12卷 1期 页码：115-118

关键词：棉花；钠部分替代钾；生长；养分吸收；

Keywords:cotton, partial replacement of potassium by sodium, growing, nutrition-absorption by cotton,

摘 要 ：钠替代部分钾的盆栽试验结果表明,在供试土壤速效钾和水溶性钠偏低的条件下,钠可以替代部分钾的作用。当Na施用浓度低于500.mg/kg时,对棉花苗期的生长有明显的促进作用;施Na.1000.mg/kg,棉种出苗率仅为60%,病苗死苗率达80%以上,生物量显著降低,可认为是Na对棉花苗期生长的临界值。将土壤速效钾水平调到K₂O.120.mg/kg、土壤水溶性钠水平调到Na.80.mg/kg,K₂O与Na之比为1∶0.67时,棉花苗期、蕾期和花铃期单株干物质积累量和钾、钠吸收量明显增加,可获得最好的籽棉产量,增产8.96%～10.28%。

Abstract:By this pot experiment,the Na was lower than 500 mg/kg,the cotton growth was promoted obviously.When Na level was 1000 mg/kg,the seeding rate of cotton was only 60%,the sickness seedling rate reaches above 80%.And the biomass remarkably reduced.That is the marginal value of employment Na in cotton seedling stage.Under the condition of the low water-soluble K strength in the test soil,when K level is 120 mg/kg,and the supply of Na level is 80(mg/kg,) and the ratio of K₂O to Na is 1∶0.67,accumulation of single sapling dry matter for the period of cotton seedling,bud and fllower-boll were increased remarkably.And the absorption of Na and K are the same.The production increased 8.96% to 10.28%.And the unginned cotton reached the most production.

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