The effects of enhanced ultraviolet-B and nitrogen supply on growth, photosynthesis and nutrient status of Abies faxoniana seedlings

• Autorzy: Yao X. , Liu Q.
• Języki publikacji: EN

Abstrakty

EN

Abies faxoniana is a key species in reforestation processes in the southeast of the Qinghai-Tibetan Plateau of China. The changes in growth, photosynthesis and nutrient status of A. faxoniana seedlings exposed to enhanced ultraviolet-B (UV-B), nitrogen supply and their combination were investigated. The experimental design included two levels of UV-B treatments (ambient UV-B, 11.02 KJ m⁻² day⁻¹; enhanced UV-B, 14.33 KJ m⁻² day⁻¹) and two nitrogen levels (0; 20 g N m⁻²). The results indicated that: (1) enhanced UV-B significantly caused a marked decline in growth parameters, net photosynthetic rate (Pn), photosynthetic pigments and Fv/Fm, (2) supplemental nitrogen supply increased the accumulation of total biomass, Pn, photosynthetic pigments and Fv/Fm under ambient UV-B, whereas supplemental nitrogen supply reduced Pn, and not affect biomass under enhanced UV-B, (3) enhanced UV-B or nitrogen supply changed the concentration of nutrient elements of various organs.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2009
• Tom: 31
• Numer: 3
• Opis fizyczny: p.523-529,fig.,ref.

Twórcy

autor

Yao X.

• Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, 610041 Chengdu, People's Republic of China
• The College of Life Sciences, Hebei University, 071002 Boading, People's Republic of China

autor

Liu Q.

• Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, 610041 Chengdu, People's Republic of China

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