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桉树是我国南方一个重要的造林树种。六十年代以后发展较快,到七十年代,广西桉树人工林已达一百万亩左右,桉树已成了国营林场和社队低丘陵荒地及四旁植树的一个重要造林树种。目前,全区国营林场每年新造的桉树林面积估计在3—5万亩之间,需要种子数量很大。以隆缘桉每市斤种子可造100亩,柠檬桉每市斤种子可造50亩来推算:全区每年大约需要隆缘桉种500市斤或柠檬桉种800市斤以上,这还未包括社队造林在内,需采母树将近一千株,我区现已选出的各种桉类优树只有92株,建立的种子园及母树林木才起步不久,从规模和成效方面来看,远远未能满足当前及今后一个时期发展桉树用种的需要。因此,不少造林单
Eucalyptus is an important afforestation species in southern China. Since the 1960s, the development has been rapid. By the 1970s, the plantation of eucalypts in Guangxi Province has reached about one million mu. Eucalyptus has become an important afforestation species of state-owned forest farms and low hilly wasteland of the communes and teams and tree planting on four sides. At present, the area of newly-built eucalyptus forests in state-owned forest farms in the region is estimated to be between 3-5mu and requires a large number of seeds. Eucalyptus eucalyptus per kilogram of seed can be made of 100 acres, lemon eucalyptus per kilogram of seeds can make 50 acres to calculate: the region needs about 500 eucalyptus or eucalyptus species of 500 kilograms of jin above, which has not yet Including the afforestation of communities and teams, nearly 1,000 trees need to be taken. Only 92 species of eucalyptus trees have been selected in our district. The seed orchards and trees started only shortly after they were established. In terms of scale and effectiveness See, far failed to meet the current and future development needs of a species of eucalyptus. Therefore, many afforestation orders