檀香的自然更新与直播造林技术

<正> 檀香(Santalum album L.)在印度的自然分布主要在温迪亚山脉(Vindhya ranye)以南,以后才被引种到奥里萨邦、中央邦、拉贾斯坦邦和北方邦的部分地区,并在那里归化,自然繁殖生长。有的学者认为,现在印度虽是檀香的主要产区,但不是檀香的原产地;檀香的原产地应是印度尼西亚的帝汶岛(Timor),大约于二千多年前引入印度,然后逸为野生状态,分布区不断扩大。 华南植物园引种檀香初步取得成功后,自1968年以来,先后在广东的海南、湛江、佛山、肇庆、韶关、汕头等地区,以及广西、云南、四川、浙江、福建等省区进行区域性试

SANDAL ITS NATURAL REGENERATION AND MEASURES FOR PLANTING BY DIRECT SEEDINGSANDAL ITS NATURAL REGENERATION AND MEASURES FOR PLANTING BY DIRECT SEEDING

Natural regeneration of Sandal(Santalum album L.)was investigated in South China Botanical Garden and Zhanjiang Medicinal Plant Experimental Farm of Guangdong Province where the plants have been cultivated for more than twenty years.Observation shows that birds(Pycnonotus sinensis)eat the Sandal fruit and through its alimentary canal pass out the undigested seed,which germinates under bushes and on the fringe of forest belt.Enlightened by this phenomenon,experiment of planting by direct seeding has been carried out.The data from the experiment is sufficient to show that to establish Sandal plantation by direct seeding in Southern Guangdong can be succeeded and has more advantages than by transplanting.The main silvicultural meaures needed for planting by direct seeding are:(1)Selecting suitable planting sites,to provide favorable climatic,edaphic and ecological conditions;(2)Maintaning suitable host plants,which should be raised earlier or are dibbled along with the Sandal seed;(3)Planting by direct seeding should be planned to take advantage of periods,when favorable moisture condition will prevail long enough for seed to germinate and for seedling to become established;(4)Careful tending of suppressed host plants,but in case the seedlings of Sandal are overtopped by the host,the host is lopped,to provide enough light to the seedlings.Natural regeneration of Sandal(Santalum album L.)was investigated in South China Botanical Garden and Zhanjiang Medicinal Plant Experimental Farm of Guangdong Province where the plants have been cultivated for more than twenty years.Observation shows that birds(Pycnonotus sinensis)eat the Sandal fruit and through its alimentary canal pass out the undigested seed,which germinates under bushes and on the fringe of forest belt.Enlightened by this phenomenon,experiment of planting by direct seeding has been carried out.The data from the experiment is sufficient to show that to establish Sandal plantation by direct seeding in Southern Guangdong can be succeeded and has more advantages than by transplanting.The main silvicultural meaures needed for planting by direct seeding are:(1)Selecting suitable planting sites,to provide favorable climatic,edaphic and ecological conditions;(2)Maintaning suitable host plants,which should be raised earlier or are dibbled along with the Sandal seed;(3)Planting by direct seeding should be planned to take advantage of periods,when favorable moisture condition will prevail long enough for seed to germinate and for seedling to become established;(4)Careful tending of suppressed host plants,but in case the seedlings of Sandal are overtopped by the host,the host is lopped,to provide enough light to the seedlings.