Effects of Eucalyptus Litter Extract on Seed Germination and Seedling Growth of Zenia insignis Chun

Botanical Research Pub Date : 2023-01-01 DOI:10.12677/br.2023.125034

春宇罗

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Abstract

To demonstrate the influence of Eucalyptus litter extract on the germination and seedling growth of Zenia insignis for a providing theoretical basis for Eucalyptus plantation reconstruction and optimization of forest stand structure, an indoor artificial simulation experiment was conducted us-ing five different concentration gradients of Eucalyptus litter extracts for petri dish germination and potted experiments. The results showed that: 1) Eucalyptus litter extract had a concentration effect of “low promotion and high inhibition” on the allelopathy of seed germination and seedling growth of Z . insignis . In the mass concentration range of 0 g/mL~0.05 g/mL, it had a certain promoting effect on the seed germination and seedling growth of Z . insignis ; When the concentration exceeds 0.10 g/mL, it has a significant inhibitory effect on the germination and seedling growth of Z . insignis seeds. 2) According to the calculation results of the comprehensive allelopathy index, the allelopathy of Eucalyptus litter extract on the seed germination of Z . insignis is greater than its allelopathy on the seedling growth of Z . insignis . Due to the relatively small impact of liquefied substances extracted from Eucalyptus litter on seed germination and seedling growth of Z . insignis , it is theoretically feasible to use Z . insignis as a mixed tree species in Eucalyptus plantations for stand transformation.

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