钙镁比调控对烟叶产量、化学品质及镁吸收的影响

通过田间小区试验,研究了施用镁肥进行土壤交换性钙镁比下调及叶面喷施镁肥对烤烟生长发育、产量、内在化学品质及镁吸收的影响。结果表明,与对照不施镁肥相比,土壤交换性钙镁比下调及叶面喷施镁肥有利于烤烟的生长、发育和农艺性状改善,有利于烟叶产量、产值的提高,能提升中部烟叶化学品质,土壤交换性钙镁比调控到10时最佳,其次是调控到8时,叶面喷施效果也较好;同时,与对照相比,土壤交换性钙镁比下调及叶面喷施镁肥显著提高了烟叶镁的含量及其对镁的累积量,尤其是上、中部烟叶,而且随着镁肥施用量增加和钙镁比下调,烟叶对镁的累积量显著增加。

Effects of Ca/Mg Regulation on the Flue cured Tobacco Yield, Chemical Quality and Magnesium Uptake

Effects of soil exchangeable Ca/Mg controlled by soil Mg fertilizer or foliar application on the flue-cured tobacco growth,yield,intrinsic chemical quality and magnesium uptake were studied by using the field plot experiments.The results indicate that soil exchangeable Ca/Mg reduction or foliar Mg fertilizer application is conducive to the growth and development,agronomic traits improvement,output of flue-cured tobacco.And it can enhance the intrinsic chemical quality of middle leaves,in which soil exchange...