火炬松经多年的引种栽培,显示出:生长快、成材速、干形通直和抗性较强的优越性。但由于种源稀少,因此,研究火炬松开花结实的规律问题,以采取有效措施,促进早结实,多结实,提高种子品质,提供较多较好的种子,实是当务之急。一、火炬松开花结实的性状火炬松为雌雄同株异花,一般要在10年后进入开花结实阶段。但经营管理好,水肥条件跟得上,于栽培后第四年左右,就有少量单株 Loose pine after many years of introduction and cultivation, shows: fast growth, speed, dry-shaped straight and strong resistance superiority. However, due to the scarcity of provenances, it is imperative to study the law of flowering and fruiting of Pinus taeda in order to take effective measures to promote early fruiting, more robust, improve seed quality and provide better seeds. First, the strong performance of loblolly flowering loblolly pine hermaphrodite flower, usually in 10 years after entering the flowering and fruiting stage. However, good management, water and fertilizer conditions keep pace, about the fourth year after planting, there are a small number of single plant