钙、镁对骏枣品质及中微量元素含量的影响

Effects of Ca and Mg on fruit quality and some secondary trace elements contents in Ziziphus jujube Mill.fruit

为骏枣钙肥和镁肥的合理施用提供了理论依据,以阿克苏地区4 a树龄骏枣树为试材,分别对其施用不同浓度的Ca(NO3)2和MgSO4,并对成熟期果实品质及中微量元素进行测定。结果表明:喷施不同浓度的Ca(NO3)2和MgSO4对骏枣果实品质及中微量元素含量较对照均有不同程度的提高,各肥料以0.6%的Ca(NO3)2和1.0%的MgSO4对改善骏枣果实品质效果最明显,能极显著提高单果质量,及可溶性固形物、Vc、可溶性糖、还原糖和蛋白质的含量,极显著降低可滴定酸含量;0.4%的Ca(NO3)2能极显著提高果实中Mg、Mn、Cu的含量;1.0%的MgSO4能极显著提高果实中Ca、Mg、Zn的含量。

In order to provide theory basis for Ca and Mg fertilizers application rationally in Ziziphus jujube, taking four-year-old Z. jujube Mill. in Aksu area as materials, different concentrations of Ca（NO3）2 and MgSO4 were applied, ripe fruit quality was analyzed, and contents of some secondary trace elements in ripe fruit were determined. The results showed that the fruit quality and contents of some secondary trace elements in fruits were increased at different levels by spraying different concentrations of Ca（NO3）2 and MgSO4. Spraying 0.6% of Ca（NO3）2 and 1.0% of MgSO4 could obviously improve fruit quality, some indexes could be extremely significantly increased, including fruit mass, soluble solids content, Vc content, soluble sugar content, reducing sugar content and protein content, but the content of titratable acid was extremely significantly reduced. Spraying 0.4% of Ca（NO3）2 could extremely significantly improve the contents of Mg, Mn and Cu in fruit, spraying 1.0% of MgSO4 could extremely significantly improve the contents of Ca, Mg and Zn in fruit.