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种子的成熟通常是以形态特征来判断采种期的。各个树种的果实达到形态成熟时会呈现出各自不同的特征。荚果、翅果类果皮由绿色变为褐色,如国槐、臭椿、复叶械、白蜡等,同时水
Seed maturity is usually based on morphological characteristics to determine the seed collection period. The fruits of all species will show different characteristics when they reach the state of maturity. Pods, samara peel from green to brown, such as Sophora japonica, Ailanthus altissima, compound leaves, white wax, etc., while water