叶面喷施钙镁肥对‘妃子笑’荔枝果肉苹果酸积累的影响

Subjects: Biology >> Botany >> Applied botany submitted time 2021-11-04 Cooperative journals: 《广西植物》

廖海枝 林晓凯 杨成坤 杜婧加 彭俊杰 周开兵

Abstract： Spraying the foliar nutrition of calcium and magnesium on ‘Feizixiao’ litchi was explored for the effect of malic acid accumulation to provide some theoretical reference and technical support for the actual production of litchi in China. During the period of ‘Feizixiao’ litchi fruit development, 0.3% magnesium chloride (Mg), 0.3% calcium chloride (Ca), their mixture (Ca+Mg) and clean water (CK) were sprayed on leaves. And contents of water-soluble calcium, water-soluble magnesium and malic acid and the activities of malic acid metabolism-related enzymes in fruit flesh were measured. The multivariate linear correlation analysis were also performed. The results were as follows: (1) The content of malic acid showed a L-shaped trend, Mg, Ca and Ca+Mg treatments might promote the accumulation of malic acid in the early stage of fruit growth and development, while Ca treatment might promote the accumulation of malic acid in the late stage. (2) The content of water-soluble calcium in the flesh showes increasing trend, and the content of water-soluble magnesium showes the trend like “M”. (3) The content of malic acid was positively correlated with the activity of NADP-ME in CK and Ca, and PEPC and NAD-MDH in Ca+Mg, while the content of malic acid was negatively correlated with the activity of PEPC and MS in CK. (4) The water-soluble calcium inhibited the activities of NAD-MDH and NADP-ME, while water-soluble magnesium inhibited the activities of NADP-MDH and MS. In conclusion, foliar spraying of calcium and magnesium can affect the contents of water-soluble calcium, magnesium and malic acid metabolism-related enzymes, and the linear correlation also changes. Different treatments can affect the accumulation of malic acid in pulp and cause the change of total acid content in pulp. Ca treatment may inhibit pulp respiration by accumulation of malic acid and then reducing the loss of sugar in pulp, which can be used as fertilizer technology in production.

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