Analysis of mineral element content and correlation with rhizosphere soil factors in Phellodendron chinense of different ages
[Objective]This study aims to explore the patterns of mineral element content variation in different parts and rhizosphere soil of Phellodendron chinense of different ages.Additionally,it investigates the correlation between mineral elements and soil factors.The findings provide a basis for nutritional diagnosis and scientifically informed fertilization practices in young P.chinense.[Method]The contents and changes of mineral elements in different parts(leaf,current-year branch and root)and rhizosphere soil of P.chinense 1-3 a seedlings were studied.The correlation between rhizosphere soil and different parts,as well as between mineral elements in each part,was analyzed,and the enrichment ability of different parts to mineral nutrients in soil was evaluated.[Result]1)Significant variations were observed in mineral element content among different tree ages and parts.With increasing tree age,the content of N,Ca,Cu,Zn in leaf,P and Cu in current-year branch,and Mg in root showed a significant decrease(P＜0.05).2)Significant differences were found in the mineral element content of rhizosphere soil among different tree ages(P＜0.05).Ca,Mn,and Zn content significantly increased with tree age(P＜0.05),whereas Fe content exhibited a significant decrease(P＜0.05).The order of mineral element content in rhizosphere soil was:N＞K＞Ca＞Fe＞P＞Mn＞Mg＞Cu＞Zn.3)P.chinense had different enrichment capacity for mineral elements in rhizosphere soil,with strong enrichment capacity for Ca and Mg,medium enrichment capacity for N,P and K,and low enrichment capacity for Fe,Mn and Cu.4)Significant positive correlations were observed between K in leaf and P(P＜0.05),as well as between N in current-year branch and root with K.N in various parts showed significant correlations with multiple elements(P＜0.05).Furthermore,significant correlations existed between soil elements and multiple elements in leaf and root(P＜0.05).[Conclusion]The contents of mineral elements in different parts of young forest of P.chinense and soil in different growing years show different changing regularity.There are both synergistic and antagonistic effects between elements in different parts and with mineral elements in the soil,and different parts have different enrichment ability to mineral nutrient elements.These findings suggest the need to supplement N,Ca,Cu,and Zn in leaf and ensure a balanced application of P and Mg when fertilizing young P.chinense to maintain optimal nutrient balance in plants.
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