搜索结果: 1-2 共查到“园艺学 Pinus”相关记录2条 . 查询时间(0.062 秒)
形态特征：常绿乔木，高可达45米，树冠宽塔形或伞形。树皮红褐色，下部灰褐色，裂成不规则的鳞状块片。针叶每束2根，细长而柔韧，边缘有细锯齿，长12-20厘米，先端尖锐。雄花序无柄，柔荑状，腋生在新权的基部，雄蕊螺旋状排列；雌花序球形，一至数个生于新枝的顶端或上部。球果长圆状卵形，成熟后栗褐色。种子长卵圆形，有翅。花期4-5月，果期9-10月。
Litter Decomposition of Picea orientalis, Pinus sylvestris and Castanea sativa Trees Grown in Artvin in Relation to Their Initial Litter Quality Variables
Decomposition forest ecosystem litter quality lignin Artvin
2009/1/13
The aim of the present study was to determine the effects of the litter chemistry of spruce (Picea orientalis), pine (Pinus sylvestris) and chestnut (Castanea sativa) grown in the Artvin region on th...