Effects of Different Types of Potash Fertilizer Combined Application on Flue-cured Tobacco Potassium Accumulation, Distribution, Growth and Development

PurposeIn order to find out the effects of different types of potash fertilizer application on the accumulation, distribution of potassium and flue-cured tobacco growth.

MethodThe effects of potassium sulfate and humic acid potash fertilizer on the growth, accumulation and distribution of potassium in flue-cured tobacco were studied by means of pot culture.

ResultAt the same level of potash fertilizer, combined application of potassium sulfate with humic acid potassium fertilizer could promote the growth and development of tobacco plants, increase the dry matter content of tobacco plants and optimize the distribution of potassium in all parts of flue-cured tobacco. Compared 75% potassium sulfate + 25% humic acid potassium fertilizer with potassium sulfate alone, the content of potassium in leaves, stems and roots increased by 16.50%, 8.08% and 12.13%, respectively. The fertilizer utilization efficiency and economic utilization ratio of 75% potassium sulfate + 25% humic acid potassium fertilizer reached 34.82% and 6.92%, respectively, which were 2.27 times and 2.38 times, 3.20 times and 2.67 times of potassium sulfate and humic acid potassium fertilizer, respectively.

ConclusionIn the case of weak growth of the tobacco plant, with 75% potassium sulfate + 25% humic acid potassium fertilizer with the best effect, the tobacco leaf potassium distribution rate of 57.14%, compared with single application of potassium sulfate, potassium content increased by 16.50%, the utilization rate of potassium fertilizer increased by 126.42%.