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光皮桦Betula Luminitera Winkl,属桦木科,落叶乔木,适应性强,生长快,是速生用材树种之一。它的材质很好,细致而硬,不潮难裂,可作高级用材。光皮桦分布在山区,能飞子成林。我县小沙江、大水田、望云山等山区都有自然分布。各地实践经验证明,丘陵区营造光皮桦也能速生丰产,但因其种子成熟期在5-6月,气候炎热干燥,不易成苗,人工采种育苗须妥善护理。据资料介绍,光皮桦种子成熟后休眠期很短,在呼吸过程中很快丧失发芽力(贮藏80天以后的种子发芽力等于零)。为此,光皮桦种子育苗宜随采随播。6月播种,在种子发芽出土前的7-10天,每
Betula Luminitera Winkl, a birch family, deciduous trees, adaptability, rapid growth, is one of the fast-growing timber species. Its material is very good, meticulous and hard, not tide crack, can be used for advanced timber. Light birch distribution in the mountains, can fly into a forest. My county Xiaoshajiang, paddy fields, Wang Yunshan and other mountainous areas have a natural distribution. Practice has proven around the hilly area to create light birch can also be fast-growing, but because of its maturity in May-June, the climate is hot and dry, not easy to seedlings, artificial seedlings should be properly nurtured. According to the information, the light birch seeds mature dormancy is very short, rapid loss of germination in the breathing process (after 80 days of seed germination force is equal to zero). To this end, the light birch seedling should be slaughtered with mining. June sowing, 7-10 days before seed germination, each