Abstract:
Objective To provide theoretical basis for the efficient cultivation of C. lanceolate, the effects of graphene on the growth, root morphology and nitrogen uptake and utilization of Cunninghamia lanceolata were investigated in this study.
Method A pot experiment with four concentrations of graphene (0, 20, 25, 30 mg·L−1) was conducted in this study by using the superior clone of C. lanceolata seedlings ‘Yang 061’ to investigate the growth, root morphology, 15N distribution and utilization rate of C. lanceolata seedlings under various graphene treatments.
ResultsThe indexes of growth and root morphologies were maximum at 25 mg·L−1 graphene concentration except for stem weight and root volume, but no significant difference were observed among different treatments. The 15N utilization rate of seedlings was 25 mg·L−1>20 mg·L−1>30 mg·L−1>CK1, and the distribution of 15N in different organs of C. lanceolata seedlings was leaf > stems > roots. Correlation analysis results showed that a significantly positive correlation between roots 15N partition rate and seedlings 15N utilization rate with different growth indexes were observed except for root length, root volume, root 15N partition rate and root diameter.
Conclusion A certain concentration of graphene is beneficial to the growth of C. lanceolata seedlings and can promote the absorption and utilization of N.
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