‘黄冠’梨鸡爪病果实矿质元素含量分析

Analysis of the content of mineral elements in 'Huangguan' pears of Jizhua disease

【目的】通过测定不同发病程度的果实和正常果实矿质元素含量,分析鸡爪病与矿质营养的关系,以期为解释其生理机制和探讨防治措施提供科学依据。【方法】以不同发病程度的‘黄冠’梨为试材,利用电感耦合等离子体原子发射光谱分析法,对同期采收的鸡爪病重果、鸡爪病轻果和正常果进行K,Ca,Mg,B,Fe,Cu,Zn,Mn等元素含量测定,并针对‘黄冠’梨鸡爪病与矿质元素的相关性进行分析。【结果】在重度和轻度病果果皮中,B元素含量均极显著低于正常果,在果肉中,B元素在重度病果中含量极显著低于轻度病果,轻度病果中的含量极显著低于正常果,这一变化规律和发病程度一致,并且缺B表现与鸡爪病症状相近。而其他矿质元素的变化规律与发病程度无相关性或相关性较差,并且这些元素的缺素特征与鸡爪病发病表现存在差异。【结论】鸡爪病发生可能与果实中B元素含量低密切相关。

【Objective】To analyze the relationship between Jizhua disease and mineral nutrition and provide a scientific basis for explaining its physiological mechanism and exploring prevention measures,the content of mineral elements in fruits and normal fruits with different degrees of disease were measured.【Methods】Taking‘Huangguan’pears with different incidence as test materials,inductively coupled plasma atomic emission spectrometry was used to determine the content of K,Ca,Mg,B,Fe,Cu,Zn,Mn and other elements in the same period of harvested Jizhua disease severely diseased fruit,Jizhua disease mildly diseased fruit and normal fruit,and the correlation between the Jizhua disease and mineral elements of‘Huangguan’pear was analyzed.【Results】The results showed that the content of B element in the severe and mild fruit peels was significantly lower than normal fruit.In the flesh,the content of element B in the severely diseased fruit was significantly lower than that in the mildly diseased fruit,and the content in the mildly diseased fruit was significantly lower than that of the normal fruit,and this change is consistent with the degree of disease.However,there is no correlation or poor correlation between the changes of other mineral elements and the degree of disease,and the deficiency characteristics of these elements are different from the incidence of Jizhua disease.【Conclusion】The occurrence of Jizhua disease may be closely related to the low content of B element in fruits.