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在葡萄牙的西贝,发展兰桉种子园的研究开始于60年代。目的是为了在单位面积上年年获得高产纸桨材。研究包含以下步骤: 加号树的选择;嫁接;栽植第一代种子园;子代测定;在第一代种子园内淘汰不适合的无性系;栽植第二代种子园。根据材积生长量和树形,最初选择了260株加号树,其中选出约50个无性系供建立种子园之用,用所谓的瓶接法进行嫁接。不久,在总面积27公顷的土地上已建立4个种子园。嫁接后的保存率达75％,最初几年内,种子园每年损失10％。蒴果产量尚未到达预期的水平。1979年收种子2.5公斤并可指望有相当的增产。用种子园的种子造林,在生长量和一致性似乎比普通造林优越。当年建立子代测定。为了刺激开花和改进授粉作用,将采取不同措施。种子园种子的成本将比商业上种子高许多倍,但仍不大于总设备成本的1％。按预期每公顷纸桨产量至少增加15％来计算,前途是有希望的。
The study of developing Eucalyptus Seed Orchards in Western Begins, Portugal, began in the 1960s. The aim is to obtain high-yield paper-based pulp annually in the unit area. The research includes the following steps: selection of the tree of choice; grafting; planting first-generation seed orchard; determination of offspring; elimination of unsuitable clones in first-generation seed orchard; planting second-generation seed orchard. Based on the volumetric growth and the tree shape, 260 tree trees were initially selected, of which about 50 were selected for seed orchard establishment and were grafted using the so-called vial method. Soon, 4 seed orchards have been established on 27 hectares of land. Grafted after the preservation rate of 75%, the first few years, the seed garden lost 10% each year. Capsule production has not yet reached the expected level. Seeding 2.5 kg in 1979 and expecting a considerable yield increase. Afforestation with seed orchard seed seems to be superior to normal afforestation in growth and consistency. The establishment of offspring determination. In order to stimulate flowering and improve pollination, different measures will be taken. Seed orchard seeds cost many times more than commercial seeds, but still not more than 1% of total equipment costs. Calculated on the expectation that paddy output will increase by at least 15% per hectare, the future is promising.