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Acta Horticulturae Sinica ›› 2026, Vol. 53 ›› Issue (6): 1737-1752.doi: 10.16420/j.issn.0513-353x.2025-0317

• Cultivation · Physiology & Biochemistry • Previous Articles     Next Articles

Effects of Continuous Cropping on the Growth and Photosynthesis of Facility-Grown Cut Chrysanthemums

LIU Huahao, CHEN Jiaying, YU Lizhen, QI Qimo, ZHAO Shuang, FANG Weimin, CHEN Fadi, GUAN Zhiyong*()   

  1. College of HorticultureNanjing Agricultural University/State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization/Key Laboratory of Landscaping,Ministry of Agriculture and Rural Affairs/Key Laboratory of Flower Biology and Germplasm Innovation,Ministry of Agriculture and Rural Affairs/Key Laboratory of Biology of Ornamental Plants in East China,National Forestry and Grassland Administration, Nanjing 210095, China
  • Received:2025-06-28 Revised:2026-03-23 Online:2026-06-25 Published:2026-06-25
  • Contact: GUAN Zhiyong

Abstract:

Unified cultivation experiments were conducted using the cut chrysanthemum cultivar‘Nannong Xiaojinxing’in soils with different continuous cropping histories:facility soils continuously cropped for 6 years,7 years,and 16 years,as well as a native saline soil that had been continuously cropped for 6 years(referred to as native saline soil). Morphological indices and photosynthetic parameters of the plants were measured after budding. Multivariate linear regression and path analysis were employed to explore the effects of soil physicochemical indicators on the growth and appearance quality of cut chrysanthemums,as well as the interrelationships among these soil properties. The results showed that soil cation exchange capacity(CEC),catalase activity had positive effects on the growth and photosynthesis of cut chrysanthemums,while soil electrical conductivity(EC)and excessive available zinc content exerted inhibitory effects. The variation range of EC values across soil samples(ranging from 1.7-fold to 15-fold)was much greater than that of available zinc content(less than twofold),indicating that in the tested salinized soils,the inhibition of growth and photosynthesis in cut chrysanthemums was primarily attributable to excessively high soil EC values. Aboveground fresh weight,plant height,stem diameter,leaf SPAD value,net photosynthetic rate,stomatal conductance,and transpiration rate of chrysanthemums all decreased with increasing soil EC,whereas intercellular CO2 concentration increased with increasing EC. Soil EC showed a highly significant negative correlation with soil urease activity and cation exchange capacity. In conclusion,excessive salt accumulation is the primary factor inhibiting growth and reducing quality in continuously cropped soils for cut chrysanthemums. This leads to restricted root growth and photosynthesis,resulting in poorer aboveground growth. The inhibitory effect on cut chrysanthemums intensifies,and the deterioration of cut flower quality becomes more pronounced with increasing salinity.

Key words: chrysanthemum, cut flower, soil degradation, salinization, continuous cropping in facilities, cut flower quality