‘丁岙’杨梅生长期矿质元素含量变化研究

摘要

N,P,K,Ca,Mg,S,Fe,Mn,B,Zn and Cu in the roots,branches,leaves,and fruits of Dingao Chinese bayberry (Myrica rubra Sieb. et Zucc.) during its fruit developmental stages, from flower bud differentiation,young-fruit and fruit-expansion to senescence, were monitored. Substantial variations on the contents of N,K,Ca,Fe,Mn,B,Zn and Cu were found during the berry development.In general,these contents were higher in the young fruits and during their expansion period.In the young fruits,the highest contents of Ca and B were 3.91 g·kg-1 and 54.4 mg·kg-1 ,respectively,found in the leaves;and those of N and K,26.07 g·kg-1 and 14.33 g·kg-1 ,respectively,in the berries.During the expansion period,the greatest content of Fe of 380.7 mg·kg-1 occurred in the roots;those of Ca and Zn were 4.72 g·kg-1 and 751.1 mg·kg-1 ,respectively, in the branches;and those of N and Mn,17.90 g · kg-1 and 879.9 mg/kg,respectively,in the leaves.The differences and changes during the fruit development on P,Mg and S contents in the various organs were not significant.The information obtained could serve as a guideline for adequate fertilization for the cultivation of Dingao Chinese bayberries.%为了掌握‘丁岙’杨梅生长期矿质元素含量变化规律及分配特性，以‘丁岙’杨梅为材料，分别测定根、枝、叶、果在幼果期、果实膨大期、花芽分化期和休眠期的 N、P、K、Ca、Mg、S、Fe、Mn、B、Zn、Cu等11种矿质元素含量变化。结果表明，‘丁岙’杨梅生长期，不同器官之间的 N、K、Ca、Fe、Mn、B、Zn、Cu 等矿质元素含量差异较大，幼果期和果实膨大期含量较高。其中幼果期叶的 Ca、B，果的 N、K 含量最高，分别为3．91 g·kg－1、54．4 mg·kg－1、26．07 g·kg－1和14．33 g·kg－1，果实膨大期根的 Fe，枝的 Ca、Zn，叶的 N、Mn 含量最高，分别为380．7 mg ·kg－1、4．72 g ·kg－1、751．1 mg ·kg－1、17．90 g ·kg－1和879．9 mg·kg－1，不同器官以及不同时期之间 P、Mg、S 含量差异和变化较小。