在将香椿幼苗分成五级的基础上,按照公式∑ciNi计算幼苗分级值(SGV),经回归分析表明,SGV能准确地反映香椿种子活力水平。以SGV作为香椿种子的活力指标,研究种子活力与电解质外渗量和幼苗生长量之间的关系,结果表明,高活力的种子细胞膜完整,电解质外渗量小,幼苗生长量大。此外,本文还建立了预测场圃发芽率的数学模型。 Based on the formula ΣciNi, seedling classification value (SGV) was calculated based on the classification of Toona sinensis seedlings into five levels. The regression analysis showed that SGV could accurately reflect the seed vigor level of Toona sinensis. Using SGV as the vigor index of seeds of Toona sinensis, the relationship between seed vigor and electrolyte extravasation and seedling growth was studied. The results showed that seed cells with high activity were intact, electrolyte leakage was small and seedling growth was high. In addition, this article also established a mathematical model to predict the germination rate of the nursery.