关键词: 柑橘, 枳, 丛枝菌根真菌, 实生苗, 重碳酸盐, 活性铁

Abstract:

Effects of arbuscular mycorrhiza (AM) fungus (Glomus versiforme) on growth and iron nutriton of trifoliate orange [Poncirus trifoliata (L.) Raf.] were investigated with a sand culture under iron deficiency and heavy bicarbonate stress. Results showed that the colonization of Glomus versiforme significantly increased the plant height, stem diameter, shoot and root dry mass under bicarbonate stress at pH 7.0 and pH 8.0. AM fungus inoculation significantly enhanced the accumulation of chlorophyll and active iron, and increased Fe/P, and decreased 50(10P+K)/Fe ratios, suggesting that arbuscular mycorrhizal fungi alleviate chlorosis caused by iron-deficiency in trifoliate orange.

Key words: citrus, Poncirus trifoliata (L.) Raf, arbuscular mycorrhizal fungi, trifoliate orange, bicarbonate, Active iron