前言窿缘桉种子颗粒微小,在苗床发芽过程中,容易受各种不良环境条件的影响降低出苗率。我国南方的桉树育苗,无论是容器苗或是裸根苗,大多数地区都是先在苗床上培育撒播小苗,然后再进行移植。普遍采用松针、茅草和火烧土(又称草皮衣)等作苗床覆盖材料。用细小的种子育苗时,苗床覆盖物具有良好的透水性、透气性和持水性是非常必要的。如果种子的直接覆盖材料是黄心土或是火烧土,都容易板结,透水透气性差,容易造成种子 Preface Eucalyptus margin seed particles tiny, seedbed in the germination process, vulnerable to various adverse environmental conditions reduce the emergence rate. Eucalyptus nursery in southern China, whether it is container seedlings or bare root seedlings, most areas are first nursed on the seedbed seedlings, and then transplant. Commonly used pine needles, thatch and fire soil (also known as turf clothing) for seedbed cover material. Seedling with small seeds, the seedbed cover has a good water permeability, permeability and water holding is very necessary. If the seeds are covered directly with yellow hearth soil or fire clay, are easy to knot, permeability permeability is poor, easily lead to seeds