烟草钾素营养与钾肥研究

钾是烟草的品质元素。从钾的生理功能、与烟叶品质的关系、钾的土壤化学以及钾的吸收与分配等方面详细论述了钾的营养生理和土壤化学行为以及中国烟叶含钾量偏低的可能原因。笔者还调查了中国目前钾肥的使用情况,得出结论:目前烟草上使用的钾肥种类主要为硫酸钾和硝酸钾;烟叶含钾量与钾肥施用量呈正相关;钾肥分次追施的效果好于一次性基施;钾肥应该与铵态氮之后施入土壤,并应深施,分层施肥的效果较好;硫酸钾与硝酸钾配施的效果优于硝酸钾。并提出了提高烟叶含钾量的几点建议。

Potassium nutrition and potassium fertilizer for tobacco production

Potassium is the most important quality element of tobacco. This paper has fully discussed the potassium nutritional physiology, the chemical behavior in soil of potassium and the possible reasons of low potassium content of China tobacco leaf in some aspects, such as the physiology function, the relations with quality of tobacco leaf, the soil chemistry of potassium, uptake and distribution of tobacco plant, etc. Furthermore, we investigated the potassium application on tobacco production in China and summarized the following conclusions. 1. The major type of potassium applied on tobacco production in China is K2SO4 and KNO3. 2. Increasing K application had a tendency to raise K level in leaf. 3. Apply K in several times better than in one time. 4. K should apply into soil before NH4 -N applied and deep application. Double layer application is better than basal dressing. 5. K2SO4 and KNO3 apply together better than only apply KNO3.