土壤供鉀水平對烤煙生長及鉀素營養(yǎng)的影響

Effects of Soil Potassium Supply Level on Development and Potassium Nutrition of Flue-cured Tobacco

摘要: 通過盆栽試驗,，研究了不同土壤供鉀水平對煙株長勢、生理生化指標和下部煙葉含鉀量的影響,，并以此制定鉀素豐缺指標,。試驗結果初步得出，烤煙現(xiàn)蕾初期下部煙葉鉀含量小于0.9%為缺鉀,，0.9%～1.25%為輕度缺鉀,，1.26%～1.60%為潛在缺鉀，大于1.60%為鉀素充足,；土壤速效鉀含量小于55 mg/kg 為低,，55～110 mg/kg 為較低，110～160 mg/kg 為中等,，160～230 mg/kg 為較豐富,，>230 mg/kg 為豐富。

Abstract: A pot experiment was conducted to study the effects of soil potassium supply level on the growth, indices of physiology and biochemistry, and the potassium content in lower leaves of tobacco plant. The results showed that in early budding stage, when the potassium content of lower leaves was below 0.9%, the tobacco plant was deficient in potassium, when the content ranged 0.9%-1.25%, the tobacco plant was less deficient in potassium, and 1.26%-1.6% was potencially deficient, over 1.60% was sufficient. The content of soil available potassium was lower when below 55 mg/kg, deficient when 55-110 mg/kg, moderate when 110-160 mg/kg, relatively rich when 160-230 mg/kg, and rich when over 230 mg/kg.