Yields of gladiolus flowers and corms supplied with differential nutrients

Fertilizers composed of several nutrient elements were supplied to gladiolus at its different growing seasons to prove the importance of potassium very abundantly contained in the plant as the authors have reported. With corms of 2.5cm. in diameter planted in the soil in which nutrients were scarecely contained, flower production was not affected regardless of whether the fertilizer was supplied or not. This result agrees with the authors' previous experiment, and shows that a normal size corm does not require any fertilizer for flower production. The numbers of corm and cormel harvested were increased when supplied with potassium together with phosphate, especially after flowering, and more large size corms were produced with the nutrient combination of potassium and nitrogen or whole three elements. These results proved our conjecture that potassium may be important for gladiolus culture, and potassium increased the number of corms or cormels when supplied with phosphate and enlarged the size of corm when supplied with nitrogen