不同化控措施对烤烟生长和烟叶氮·磷·钾含量的影响

摘要

[目的]研究不同化控措施对烤烟生长和不同生长时期烟叶氮、磷、钾含量的影响.[方法]通过土培盆栽试验,在烤烟旺长期、现蕾前期及打顶期叶面喷施7种化控物质,设清水对照.[结果]氯吡脲(KT-30)+磷酸二氢钾+氨基酸+黄腐酸处理(T5)、萘乙酸钠+胺鲜酯(DA-6)+KT-30+磷酸二氢钾+氨基酸+黄腐酸处理(T7)可有效促进烤烟的生长;T5处理可降低烤烟后期中、上部叶氮含量,提高烟叶的磷含量,使烟叶的氮、磷含量最接近优质烟叶的氮、磷含量标准;T5、萘乙酸钠+DA-6+磷酸二氢钾+氨基酸+黄腐酸(T6)、T17处理均能有效地提高烤烟上、中、下部烟叶的全钾含量.[结论]T5处理在促进烤烟生长,改善烟株氮、磷营养,提高烟叶全钾含量方面的综合效应最好.%[ Objective ] The research aimed to study the effects of different chemical control measures on the flue-cured tobacco growth and the content of nitrogen, phosphorus and potassium in tobacco leaves of different growth periods. [ Method ] Through the soil culture experiment, seven chemical control substances and clean water were applied as foliage at vigorous growth stage, previous of squaring stage, and topping stage of flue-cured tobacco. [ Result ] KT-30 + KH2 PO4 + Amino acid + Yellow humic acid (T5) and Sodium naphthalene acetate-DA-6(hexanoic acid 2-(diethylamino) ethylester) + KT-30 + KH2PO4 + Amino acid + Yellow humic acid (T7) treatments could improve the growth of the flue-cured tobacco effectively, T5 decreased the nitrogen content of middle, upper leaves at later period of the growth of tobacco leaves, and improved the phosphorus content of leaves, which enable the nitrogen and phosphorus content of flue-cured tobacco leaves most close to the nitrogen and phosphorus content of the high quality flue-cured tobacco; treatments of T5, sodium naphthalene acetate-DA-6(hexanoic acid 2-(diethylamino) ethylester) + KH2 PO4 + amino acid + yellow humic acid (T6) and T7 improved the potassium content of the upper, middle, lower flue-cured tobacco leaves. [ Conclusion ] T5 had the best comprehensive effeczs in promoting the tobacco growth, improving the nitrogen and phosphorus nutrition status and increasing the potassium content of tobacco leaves.