Ca absorption and tipburn of lettuce were studied under different application of N, K, Ca, sprinkler irrigation and border irrigation in open field.

摘要在露地栽培条件下，研究了不同氮、钾、水平处理以及喷、畦和干烧心的影响。

The results showed: inncrease application of Ca, balance application of N and K and sprinkler irrigation could increase Ca content of lettuce leaves, reduce occurring of tipburn.

结果表明，增施肥，平衡氮、钾肥及采取喷的方式均能增加叶片的含量，减少干烧心的发。