Key Points of Late-Stage Management and Plastic Mulch Coverage Techniques for Lilies

I. Late-Stage Management

(1) Timely removal of bulbils. Bulbils should be harvested on a sunny day, and care must be taken to avoid breaking the plants or knocking off the upper green leaves.

(2) Shading and cooling, clearing ditches to reduce humidity. Shading is a measure to prevent high temperatures. Adding a straw cover at the seedling stage can reduce water evaporation and lower soil temperature for the late-stage growth of lilies.

(3) Increasing fertilizer application. After the bulbils are harvested, the leaf color of lilies gradually becomes lighter, indicating that nutrients have become imbalanced, and nutrients must be added to prevent premature senescence of the lilies. At this time, an appropriate amount of quick-acting chemical fertilizer should be applied as a supplement. During the flowering period of lilies, applying 20 kg of ammonium bicarbonate per mu diluted in water can achieve relatively good results. In addition, a 0.2% concentration of monopotassium phosphate can also be sprayed on the leaves to meet the phosphorus and potassium needs of lilies in the late stage.

II. Plastic Mulch Coverage

Plastic mulch coverage plays a clear role in raising soil temperature, increasing accumulated temperature, promoting the growth of lily basal roots during the overwintering period, and promoting early seedling emergence. Because the seedlings emerge early, the amount of growth increases, and the growth period is advanced, an effect of early maturity and increased yield can be achieved.

(1) Covering the film. The purpose of covering the film is to retain moisture and increase temperature.

(2) Removing or breaking the film. After plastic mulch coverage, lilies can emerge in early March, generally about half a month earlier than those without film coverage. At this point, the film can be removed or broken.