秋季是采集林木种子的适时季节.进入秋季,种子相继成熟,要想采得高质量的种子,正确掌握种子成熟度是重要措施之一.种子的成熟常常伴随着果实外观上的变化,因此通常是以形成特征来判断采种期的.各个树种的果实达到成熟时会呈现出各自不同的特征.特征的出现标志着采种期已经到来.荚果、翅果类果皮由绿色变为褐色,如国槐、香椿、复叶槭、白腊等,同时水分降低,果皮 Autumn is the right time to collect tree seeds into the fall, the seeds have matured, in order to obtain high-quality seeds, the correct grasp of seed maturity is one of the important measures.Seeds often mature with the appearance of the fruit changes, it is usually Is to form the characteristics to determine the seed season.The fruit of each tree species will have their own characteristics when matured.The emergence of the characteristics of the seed period has arrived.Copper and samara peel from green to brown, , Toon, Acer palmatum, white wax, etc., while reducing water, peel