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以尾叶桉 (EucalyptusurophyllaS .T .Blake)自交F1子代、尾叶桉株间杂交F1子代、尾叶桉自由授粉F1子代和尾×巨桉 (E .urophylla×grandis)种间杂交F1子代林为试材 ,讨论分析了桉树生长、材性指标的近交退化和杂种优势规律性 .结果如下 :①尾叶桉近交退化现象呈现自交子代比自由授粉子代显著 ,生长性状比材质性状显著的规律性 .②尾叶按自交子代树高、胸径和材积具有显著至极显著的近交退化 ;生材含水率、木材基本密度和树皮厚度无近交退化 .③尾叶桉自由授粉子代树高、胸径和材积有一定程度的近交退化 ,但不甚显著 ;生材含水率、木材基本密度和树皮厚度无近交退化 .④尾叶桉与巨桉种间杂交子代的树高、胸径和材积可获得显著的杂种优势 ,但不同杂交组合的杂种优势率大有差别 ;子代的生材含水率、木材基本密度和成熟材纤维长度无杂种优势 ;子代的树皮厚度和 1%NaOH抽提物含量呈显著性降低 相似文献
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紫金山矿区裸地引种耐寒桉树试验研究 总被引:2,自引:0,他引:2
紫金山矿区生态恢复的重点是选金废渣堆积场植被的快速恢复。在废矿石(渣)堆边坡引种速生、耐寒的桉树品系试验,结果表明:桉树品系在耐寒性和生长性状如树高、胸径、材积、冠幅等方面存在极显著差异。桉树受冻后通过加强抚育管理,可恢复生长、成林。邓恩桉、赤桉可在紫金山矿区大面积推广,尾赤桉、巨桉、尾叶桉不宜大面积种植,只能在低海拔区域种植。 相似文献
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Provenance/family trials of Eucalyptus pellita F. Muell were established at three seasonally-dry tropical sites in northern Australia (two in north Queensland and one on Melville Island in the Northern Territory), and at Luasong, a tropical site with year-round high rainfall and humidity in Sabah, Malaysia. After 2–3 years, it was clear that New Guinea provenances outperformed Queensland provenances in their survival, growth and form, and in their crown health, in the humid tropical environment of Luasong. New Guinea provenances were also clearly superior to Queensland provenances in their growth and form at Melville Island, but less clearly so at Cardwell, Queensland. Among Queensland provenances, Helenvale and Kuranda were superior to the more northerly Cape York provenances, Tozers Gap and Lankelly Creek, while there was little difference between the two New Guinea provenances tested, Bupul-Muting (Irian Jaya) and Keru (Papua New Guinea). Significant differences in growth traits, form and survival were demonstrated between families within provenances. In a species/provenance trial at Luasong, E. pellita displayed better growth and survival than tropical provenances of E. grandis and E. urophylla, but was inferior in growth and crown health to Acacia mangium. 相似文献
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通过专业调查,发现尾巨桉是栽培白背毛木耳的好原料之一,据此介绍尾巨桉栽培白背毛木耳的菌种、生产工艺流程、栽培关键技术。分析认为:利用尾巨桉锯末、边角料种植白背毛木耳,既开辟了桉树新用途,又改善了工厂卫生环境;而种植白背毛木耳的废料,又可用作育苗轻型基质、有机肥等,是循环经济的一种好的利用模式。 相似文献