扁桃叶片矿质元素在不同生长时期的含量变化及相关性分析

【目的】研究扁桃叶片矿质元素在不同生长时期的含量变化，并进行相关性分析，为不同扁桃生长时期营养诊断及合理施肥提供理论依据。【方法】以扁桃‘叶尔羌’品种为试材，研究叶片生长发育期间的N、P、K、B、Fe、Mn、Zn、Cu、Mg、Ca元素的含量。【结果】随着叶片生长发育，扁桃叶片中N、P、K、Mn、Zn、Cu元素含量呈下降趋势，Fe、Mg、Ca元素含量呈上升趋势，B元素含量呈锯齿状趋势。同时，扁桃各个生长时期的元素之间的相关性，展叶期时有3组，膨大期有7组，硬核期有4组，成熟期有6组，各个生长时期的矿质元素间相关均有不同。【结论】根据扁桃不同生长时期矿质元素间促进与拮抗，进行合理平衡施肥，才能满足树体对营养的需要。

Almond Leaf Mineral and Trace Element Content Changes and Correlation Analysis at Different Growth Stages

Objective]Almond Leaf Mineral and Trace Element Content Changes and Correlation Analy-sis at Different Growth Stages.This paper's goal is to provide a theoretical basis for nutrition diagnosis and ra-tional fertilization during the different growth stages.Method]The almond 'Yerqiang'varieties were taken as test materials and the content changes of N,P,K,B,Fe,Mn,Zn,Cu,Mg,and Ca elements in the leaves during the growth periods as the study subjects.Result]The results showed that during the leaf development, the content of mineral elements N,P,K,Mn,Zn and Cu showed a downward trend and meanwhile Fe,Mg, Ca demonstrated a rising trend,and the B element content was in a zigzag trend.At the same time,there were correlations between the various elements of the growth period.Three groups in the leaf expansion period,sev-en groups in expanding period,four groups during the period of hard core and six groups in the mature period, their correlation of mineral elements in different growth stages was different.Conclusion]Therefore,accord-ing to the mineral elements at different growth stages of almond,only the rational balance of fertilization can meet the nutritional needs of the tree body.