‘Keitt’芒果果肉溃败与其矿质元素的关系

摘要

为研究芒果果肉溃败发生与矿质元素之间的关系,以3个产区‘Keitt’芒果为试材,分析了健康果和溃败果果肉中N、P、K、Ca、Mg、Cu、Zn、Mn和B元素含量.结果表明:不同产区的健康果和溃败果中元素含量差异不一致,与健康果相比,仁和区溃败果中N含量高,而B含量低;新平县和华坪县溃败果中N、K、Mn、Mg和Cu含量高,而Ca和B含量低.果实养分平衡分析表明,3个产区溃败果中各元素的综合诊断施肥指数(DRIS)绝对值以及养分不平衡指数(NII)均显著大于健康果.总体上,果肉组织中元素含量之间的比例极度失衡,特别是高N和低B,可能是诱导‘Keitt’芒果果肉溃败发生的主要原因.%In order to analyze the relationship between internal breakdown and mineral nutrition in the flesh,‘Keitt’ mango fruits with internal breakdown and healthy flesh from 3 different producing areas were used to determine the concentration of nitrogen (N),phosphorus (P),potassium (K),calcium (Ca),magnesium (Mg),copper (Cu),manganese (Mn),zinc (Zn) and boron (B).The results showed that there were significant difference of mineral contents between internal breakdown fruit and healthy ones.In Renhe producing area,the N content in breakdown flesh was significantly higher,while the B content was significantly lower when compared to the healthy flesh.However,in Huaping and Xinping producing area,breakdown flesh exhibited significantly higher levels of N,K,Mn,Mg and Cu and lower levels of Ca and B than healthy flesh.Flesh nutrition diagnosis showed that absolute values for diagnosis and recommendation integrated system (DRIS) of each mineral and nutrition imbalance index (NII) of internal breakdown fruits were significantly higher than that of healthy fruits among three producing area.These results suggested that the greater imbalance of nutrient internal breakdown fruits,especial N excess and B deficiency,might be the cause of internal flesh breakdown for mango.