Physiological dynamic response of four potted plants under the stress of formaldehyde Indoor potted plants of Marantaceae and Pteridophy-tes for purification of formaldehyde polluted air Research to structure characteristics and is accreting efficiency of modified potassium fertilizers Studies on the Characteristics of Response to Photoperiod in Calceolaria × herbeohybrida‘Dainty’ Studies on the Characteristics of Response to Photoperiod in Calceolaria × herbeohybrida‘Dainty’ Chemical Regulation of the Main Ornamental Characters of Potted Plant Pyracantha fortuneana Chemical Regulation of the Main Ornamental Characters of Potted Plant Pyracantha fortuneana