豫西地区红富士苹果叶片养分含量与果实品质的关系

目的]揭示苹果叶片营养元素含量与果实品质之间的关系。方法]对豫西地区22个苹果园红富士苹果叶片N、P、K含量和果实硬度、总糖含量、可滴定酸含量、糖/酸进行了分析。结果]叶片N、P、K含量分别为(21.52±3.30)(、2.37±0.41)(、9.72±1.68)g/kg,Fe、Mn、Cu、Zn含量分别为(99.06±17.32)(、32.22±6.53)(、3.38±0.53)(、26.51±5.58)mg/kg;果实硬度、总糖含量、可滴定酸含量、糖/酸分别为(11.13±0.98)kg/cm2(、113.7±8.2)g/kg(、2.35±0.20)g/kg(、48.81±4.98)。叶片养分含量与果实品质的相关分析和通径分析表明,K含量分别与硬度、总糖含量和糖/酸呈显著正相关,Fe含量与硬度呈显著负相关。结论]对果实硬度和糖/酸影响最大的是叶片K和Fe的含量,其他元素对果实品质的影响相对较小。

Relationship between the Nutrient Content in Red Fuji Apple Leaf and the Fruit Quality in Western Henan Province

Objective] The study aimed to reveal the relationship between the nutrient content in leaf and the fruit quality.Method] The contents of N,P,K,Fe,Mn,Cu,Zn in leaf and the fruit hardness,total sugar,titratable acid,and sugar/acid ratio in Red Fuji apples from 22 orchards in western Henan province were determined.Result]The average contents of N,P,K in apple leaves were(21.52±3.30),(2.37±0.41),(9.72±1.68)g/kg,And the average contents of Fe,Mn,Cu and Zn in apple leaves were,(99.06±17.32),(32.22±6.53),(3.38±0.53) and(26.51±5.58) mg/kg,resp.The fruit hardness,contents of total sugar and titratable acid,and sugar/acid ratio were(11.13±0.98) kg/cm2,(113.7±8.2) g/kg,(2.35±0.20) g/kg and(48.81±4.98),resp.The correlation and path analysis between the nutrient content in leaf and the fruit quality showed that K content was significantly positively correlated with fruit hardness,total sugar content,and sugar/acid ratio,resp.and Fe content was significantly negatively correlated with fruit hardness.Conclusion] The greatest effect on fruit hardness and sugar/acid ratio was K and Fe contents in leaf,while other elements showed little effects on the fruit quality.