无核黄皮叶片养分含量和果实产量品质的关系

以广东郁南无核黄皮Clausena lansium为研究对象,分析其叶片N、P、K、Ca和Mg养分与果实产量品质的关系.简单相关分析表明,不同物候期的叶片养分含量与果肉品质的相关性各不相同.在花芽分化期,叶片N、K含量与果实总酸度呈显著或极显著负相关关系,叶片Ca、Mg含量与维生素C(VC)含量呈极显著、显著正相关关系,叶片Ca含量与果实可溶性固形物含量呈显著正相关关系,叶片K含量与可溶性糖含量呈极显著负相关关系.在开花期,叶片Mg含量与可溶性固形物、VC含量呈显著正相关关系,叶片K含量与产量呈显著正相关关系.在幼果期,叶片养分含量与果实各品质指标未表现出相关性.在果实膨大期,叶片K含量与果实可溶性固形物呈显著负相关关系,叶片Ca含量与产量呈显著正相关关系.在果实成熟期,叶片N含量与果实可溶性固形物和可溶性糖呈极显著正相关关系.典型相关分析表明,叶片Ca、Mg含量与果实可溶性固形物和VC含量的关系密切.

Correlations Between Nutrient Concentrations in Leaves and Quality of Fruit in Seedless Wampee

The seedless wampee, Clausena lansium, in Yunan of Guangdong province was used to study the relationships between the N,P, K, Ca and Mg concentrations in the leaves and fruit yield and quality. The simple correlation analyses showed that correlations between nutrient concentrations and fruit quality were different among phonological phases. During bud differentiation stage, there was a significant negative correlation between the N or K concentrations and fruit acidity. The Ca and Mg concentrations were highly positively correlated with vitamin C, and Ca concentration was significantly correlated with fruit soluble solid. The concentration of K was highly negatively correlated with soluble sugars. The Mg concentration was significantly correlated with soluble solids and vitamin C. There was a positive correlation between K concentrations at flowering stage and fruit productivity. No significant correlation was observed between the nutrient concentrations in the leaves at fruit stage and fruit quality. At fruit developing stage, the concentration of K was negatively correlated with fruit soluble solids, while the Ca concentration was highly positively correlated with yield. During harvest stage, the N concentration was highly positive correlated with the soluble solids and soluble sugars. Canonical correlation analysis showed that the concentrations of Ca and Mg in leaves were highly correlated with fruit soluble solids and vitamin C.