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- Title
Effects of controlled-release fertilizer on chrysanthemum leaf chlorophyll fluorescence characteristics and ornamental quality.
- Authors
Song Xu-xu; Zheng Cheng-shu; Sun Xia; Ma Hai-yan
- Abstract
Taking cut flower chrysanthemum 'Baima' as test material, a pot experiment was conducted to study the effects of controlled-release fertilizer on the leaf chlorophyll fluorescence parameters, chlorophyll and nutrient contents, and ornamental quality of chrysanthemum. Under no fertilization, the maximal photochemical efficiency of PS∏ in dark (Fv/Fm), potential photochemical efficiency of PS∏ (Fv/Fo), and quantum yield of PS∏ electron transport (ΦPS∏) decreased significantly, compared with those under fertilization. With the application of conventional compound fertilizers CCFA (N:P:K=20:8:10) and CCFB (N:P:K =14:14:14), the Fv/Fm, Fv/Fo and ΦPS∏ had a slight increase in early period (30-60 d) but a remarkable decrease in mid and later periods (75-120 d), compared with those under the application of controlled-release fertilizers CRFA (N:P:K=20:8:10) and CRFB (N:P:K=14:14:14). Under the application of CRFA, the Fv / Fm, ΦPS∏, and photochemical quenching (qP) had somewhat increase, as compared with the application of CRFB. The non-photochemical quenching (NPQ) under the application of CRFA and CRFB decreased significantly, compared with that under the application of CCFA and CCFB and the control. The chlorophyll content had a similar change trend with Fv/Fm, Fv/Fo, and ΦPS∏. The leaf N, P, and K contents, flower stalk length and stalk diameter, flower diameter, and flower fresh and dry mass at harvest stage all increased under the application of CRFA and CRFB, compared with those under the application of CCFA and CCFB and the control, and the flower fresh and dry mass was significantly higher under the application of CRFA than of CRFB. This study showed that controlled-release fertilizer could improve the ornamental quality of chrysanthemum via improving the leaf chlorophyll content, photochemical transduction rate, and nutrient uptake, and CRFA had better effects than CRFB.
- Subjects
FERTILIZER application; CHRYSANTHEMUMS; CHLOROPHYLL; ORNAMENTAL plants; PLANT nutrition; PLANT growth
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2011, Vol 22, Issue 7, p1737
- ISSN
1001-9332
- Publication type
Article