Huang, Li-ChunLi-ChunHuangPaparozzi, Ellen T.Ellen T.PaparozziGotway, CarolCarolGotway2026-01-062026-01-061997-07-01https://scholars.lib.ntu.edu.tw/handle/123456789/735113Dark Yellow Fuji Mefo chrysanthemums were grown hydroponically with 64, 127 or 254 mg N/litre and 0, 1, 2, 4, 8, 16, 32 or 64 mg S/litre in a randomized complete block. Time to flower was measured and symptoms of S deficiency were observed on root, stem and leaf systems. New leaves and inflorescences were analysed for S, and lower leaves were analysed for N concentration. There were 4 sampling dates and 2 experiments. Flower diameter was measured when flowers were present, while stem length was measured every sampling date. N application could be reduced by half to 127 mg/litre as long as some S (4 mg/litre in the autumn and 8 mg/litre in the spring) was applied. S deficiency symptoms observed included branchless roots, which aged earlier, overall yellowing of new leaves and reddening on the leaf abaxial surface starting from older leaves and moving acropetally. Plants receiving no S had smaller leaves, shorter stems, delayed inflorescence initiation and restricted inflorescence development compared with those receiving S. Without S, plants did not produce flowers suitable for commercial sale.en[SDGs]SDG15journal article10.21273/jashs.122.4.559