Allometric Growth Patterns and Phenotypic Plasticity Indices of Different Grades of Annual <i>Pinus yunnanensis</i> Franch. Seedlings at Different Growth Stages.

After October, the slope of Grade I seedlings decreased to 0.4591–0.4749, and the growth efficiency of Grade II and III seedlings was higher than that of Grade III seedlings, The most rapid increase in seedling height was found to occur in the initial phase, but the growth efficiency decreased month by month, and the growth rate showed a trend of “first fast and then slow”.

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As shown in Table 1 , the analysis of growth data from September 2022 to December of the 2023 year for three different grades found that all models had a p value of 0.000, indicating that growth data from September 2022 to December of the year 2022 were not sensitive to environmental factors, the results showed that the growth type between seedling height and ground-line diameter was allometric growth, and the growth relationship was highly significant, but the R 2 values were generally low, most of which were less than 0.3, indicating that the model had certain limitations, may be influenced by other factors.

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