Potassium improves morphology and charactersistics of Poa pratensis under dronght stress

Morphological characteristics and growth indices of Kentucky bluegrass with different potassium supply levels and water conditions were tested to provide a theoretical basis and guidance for improving bluegrass drought resistance in turf production. The results showed that the appropriate potassium supply can improve the leaf morphological changes caused by drought stress, so as to improve the drought resistant ability of Kentucky bluegrass. The leaf morphological, green color index and biomass of plants under drought stress were improved with 0.15-0.30 g·kg-1 potassium supply, especially with 0.30 g·kg-1 potassium nutrition which had the best improvement of drought resistance of Kentucky bluegrass.