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500mg/kg时,对棉花苗期的生长有明显的促进作用;施Na1000mg,/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K20120mg/kg、土壤水溶性钠水平调到Na80mg/kg,K20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%。
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 K20 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.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2006年第1期115-118,132,共5页
Journal of Plant Nutrition and Fertilizers
基金
河北省自然科学基金项目(399462)资助
关键词
棉花
钠部分替代钾
生长
养分吸收
cotton
partial replacement of potassium by sodium
growing
nutrition-absorption by cotton