本文报道和讨论了为生产种子和采果容易的巨桉无性系种子园的四种经营方法。四种方法是:①限制法:当嫁接植株高5米或超过5米、树冠下部枝条开始呈水平伸展时,约在高2米处截断主干,使存留的枝条保持水平伸展,对主干产生的萌条进行疏条,保留靠近主枝的,如此重复进行约6次,这样可站在地面采果;②截梢法:在嫁接植株高5米处截去顶梢,压低侧枝,经常摘除主干上部的萌条,须要攀援或用梯子采果;③伐落法:让嫁接植株正常生长,当树高15米左右时,约在原接砧口以上部位锯断主干(注意防止嫁接体萌芽失败,保留的枝条至少要有叶子),这样便于采果;④萌条法:在嫁接植株约2米处截去主干,保留侧枝,对主干产生的萌条适当疏条,但不同于①的处理,1973年11月形成萌条继续生长,1975年9月刈下萌条采果。最后比较球果产量和用工时数,以评价前述方法。③每株年产球果量最多,每公斤球果用工时数少;② This paper reports and discusses four methods of management for the clonal seed orchard of Eucalyptus grandis for seed production and fruit picking. Four methods are: ① restriction method: When the grafted plants are 5 meters high or more than 5 meters, the lower branches of the canopy begin to extend horizontally, and the trunks are truncated at about 2 meters in height to keep the remaining branches horizontally extending to the trunk Sprigs sparse strips, leaving close to the main branch, so repeated about 6 times, so you can stand on the ground picking fruit; ② cut method: 5 m at the top of the grafted plant truncated top, down the side branches, often removal of the trunk The upper sprigs, need to climb or use a ladder to pick the fruit; â ’¢ cutting method: the normal growth of grafted plants, when the tree height of about 15 meters, about the original anvil mouth sawing the trunk above the site (note that to prevent the grafting bud failure, Retained branches at least leaves), so easy to pick fruit; ④ sprouting law: about 2 meters in the graft plant truncated trunk, keep the side branches on the stem sprouting appropriate sparse, but different from the ① treatment, In November 1973 to form a sprout continue to grow, in September 1975 raspberry sprout fruit. Finally, the output of cones and labor hours were compared to evaluate the above method. ③ the annual output of coniferous fruit per unit, the number of working hours per kilogram less; ②