Four year old ‘Shine Muscat’ grape was used as the test material to spray amino acid calcium and water-soluble calcium solution on grape leaves and ears during fruit expansion and turn-color stages. A randomized block test was conducted to study the effects of exogenous calcium fertilizer on the formation of fruit russet and phenolic compounds in 'Shine Muscat' grape. The test was used to set the concentration of amino acid calcium solution to 1000 times, and to set the concentration of calcium water solution to 1500 times. With spraying water as a control. The results showed that: compared with water spraying, fruit russet was reduced in fruit expanding stage and turn-color stage, which could inhibit the accumulation of lignin, total phenol and total flavonoids, and affect the accumulation of eight phenolic acids in fruit peel. Spraying calcium fertilizer at fruit expanding stage was more conducive to inhibiting the accumulation of phenolic acids than that at turn stage, while spraying 1000 times of amino acid calcium at turn-color stage was more conducive to inhibiting the accumulation of gallic acid, caffeic acid, quercetin, coumaric acid and ferulic acid in pericarp than spraying 1500 times of water-soluble calcium and water. The results of this experiment can provide some guidance for grape production to supplement exogenous calcium and improve fruit quality
Four year old ‘Shine Muscat’ grape was used as the test material to spray amino acid calcium and water-soluble calcium solution on grape leaves and ears during fruit expansion and turn-color stages. A randomized block test was conducted to study the effects of exogenous calcium fertilizer on the ...