叶面增施液钙对芒果钾、钙、镁含量及品质的影响

以‘台农1号’芒果为研究对象,设置0(CK)、0.5、1.5、2.5、3.5g·L~(-1)质量浓度钙含量5个处理,于催花前、幼果期、果实膨大期及采收前分别喷施。结果表明,在一定质量浓度范围内,叶面喷施液钙具有提高叶片、果皮、果肉及果核钙含量的作用;果实钙含量显著低于叶片,第1梢叶钾、钙、镁与果实间钾、钙、镁相关性比第2梢更为显著;第2梢叶钾、镁含量变化与钙相反,呈下降趋势;叶面喷施液钙可以提高糖酸比值,显著降低果实可滴定酸,增加果实维生素C含量,提高果实品质;高钙对可溶性固形物及可溶性糖含量有降低作用。说明一定质量浓度范围(0.5~3.5g·L~(-1))内,施钙有利于提高芒果果实品质,供试条件下,以0.5g·L~(-1)钙含量处理效果最佳。

Effect of Foliage Calcium Spray on Potassium,Calcium, Magnesium Contents and Fruit Quality of Mango Plants

Effect of spraying calcium-containing solutions of varied concentrations on fruit quality as well as potassium (K), calcium (Ca) and magnesium (Mg) contents in the fruits and leaves of mango plants werestudied to determine the possible benefit of theapplication.Tainung No 1 mangotrees were subjected to the spraying of Ca solutions at the concentration of 0 (CK), 0.5,1.5,2.5, and 3.5g/L on the leaves at the time before flower induction,of early fruiting stage, during fruit growing stage,or before harvesting.It was found that the Ca contents in the leaves, as well as thepeel, pulp and stone of the fruits increased due to the treatmentswithin the tested range of Ca concentrations.Ca in the fruits was significantlylower than that in the leaves.The correlation on K/Ca/Mg contents between the 1sttip leaf and the fruits was more significant than that between the 2nd leaf and the fruits.On the 2nd leaf, itsK and Mg contents decreased, while Ca increased, after thetreatments.Interestingly, the spraying increased the sugar/acid ratio, significantly decreasedtitratable acid, and heightened vitamin C content resulting in an improved eating quality of the fruits.However, spraying athigh Ca concentration tended to reduce the soluble solids and sugars in the fruits.It was concluded that, within the tested concentration range,spraying the Ca-containing solutions on the mango plants could upgrade the fruit quality, withthe greatest effect observedat a Ca concentration of 0.5 g·L-1.