A pasty yellow juice instead of a clear one can be squeezed from strobil. 雄球花压出的是黄色的而不是澄清的浆液。
The results indicated that GA4/7 and ABA significantly promoted the formation of male strobil and GA3 also promoted it to some extent. 试验结果表明，马尾松种子园植株的雄球花受到赤霉素GA4／7和脱落酸（ABA）这两种植物生长调节剂的处理而显著增加，赤霉素GA3对雄球花有一定程度的促进作用。
