无土栽培生菜吸钾规律研究

Study on K Nutrition Characteristic of Cos lettuce

采用砂砾模拟培养形式研究生菜需钾规律,结果表明,不同营养条件下,生菜生长及钾素吸收有明显差异,施氮降低钾的吸收,适量的磷促进钾的吸收,钾水平的提高有利于钾的吸收。

The result of soilless culture experiment showed: the law of K absorption under different nutrientconditions is different. The absorption amounts of K is increased with the supplying level of K, on the other side,the absorption amounts of K tended to decrease with the supplying level of N、P.