控释钾配方肥对烤烟产量和烟叶含钾量的影响

Effect of blended controlled release potassium fertilizer on yield and potassium content of flue-cured tobacco cultivation

在大田栽培条件下,采用混料设计研究不同控释期的钾肥与常规钾肥以不同配比组成的控释钾配方肥对烤烟烟叶产量和含钾量的影响。结果表明:控释钾肥与水溶性的常规钾肥混合施用能显著提高烟叶的平均含钾量,其中以硫酸钾52.150kg/hm2+96.850kg/hm2+74.500kg/hm2配比(T7处理)效果最明显,其含钾量较常规施肥处理增加35.17%,其次是67.050kg/hm2+89.400kg/hm2+67.050kg/hm2配比(T1处理),其含钾量较常规施肥处理增加31.65%;且T1、T7处理还能同时提高上、中、下部烟叶的产量,尤其是对上部叶、下部叶具有显著的增产效应,每公顷烟叶总产量分别增加8.9%和7.0%。

The simplex-lattice design was applied to study the effect of ration of different kinds of controlled release potassium（CRK） fertilizer and conventional potassium fertilizer,blended controlled release potassium fertilizer on production and potassium content in leaves of flue-cured tobacco under field condition.The results showed that the use of blended CRK fertilizer,combined application of controlled release potassium fertilizer with water soluble conventional potassium fertilizer could significantly increase the potassium content in leaves.The effect of T7 treatment（52.150 kg/hm2＋ 96.850 kg/hm2＋74.500 kg/hm2） was maximum.K content of both T7 and T1 treatment（67.050 kg/hm2＋89.400 kg/hm2＋67.050 kg/hm2） increased by 35.17% and 31.65%,respectively.T7 treatment and T1 treatment could also increase the production of lower leaves,middle leaves and upper leaves of the tobacco with obvious increase of lower leaves and upper leaves.The yield of T7 and T1 treatment increased 8.9% and 7.0%,respectively.