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Study on dissolved law of potassium in potassium-calcium fertilizer;

钾钙肥中氧化钾的溶出规律研究

Determination of available silicon in potassium-calcium fertilizer by spectrophotometric method;

分光光度法测定钾钙肥中有效硅

Study of dissolving condition of silicon in potassium-calcium fertilizer by the uniform design;

利用均匀设计法研究钾钙肥中硅的溶出条件

The changes of the potassium content,calcium content ratio of potassium to calcium value of different leaf position in flue-cured tobacco green leaves during the field growth process were studied.

结果表明:在烤烟田间叶片生长发育过程中,随着烟叶部位的上升,叶片钾/钙值表现为逐渐增加的变化规律,而叶片钾和钙的含量均表现为逐渐下降的变化规律。