[Objective] The aim was to explore growth performance of Phoebe bournei in seedling stage.[Method] Based on 17 superior plus trees of Phoebe bournei,a seedling cultivation test was conducted in Jindong Forest Farm in ...[Objective] The aim was to explore growth performance of Phoebe bournei in seedling stage.[Method] Based on 17 superior plus trees of Phoebe bournei,a seedling cultivation test was conducted in Jindong Forest Farm in Yongzhou,Hunan Province,exploring growth indices and analyzing seedling height and ground diameter.[Result] As per the selection rate at 20％,PB17,PB9 and PB12 were selected from the 17 species.Specifically,the seedling height averaged 36.52 cm of the selected three seedlings,which was higher by 16.1％ compared with average of 17 species （31.45％）.As for ground diameter,the selected species averaged 2.6 mm,which was higher （13.0％） compared with the average level （2.3 mm）.[Conclusion]Both of seedling height and ground diameter reached extremely significant differences,which indicated that half-sib families of Phoebe bournei have rich variations,with selection and breeding potential.展开更多
The soil drought stress experiment in different durations (no watering within 3d, 6d, 9d, 11d individually) was conducted to study the drought-resistant capacity of one-year-old seedlings for the native tree species (...The soil drought stress experiment in different durations (no watering within 3d, 6d, 9d, 11d individually) was conducted to study the drought-resistant capacity of one-year-old seedlings for the native tree species (Machilus yunnanensis) in Yunnan Province and the introduced tree species (Cinnamomum camphora). The leaf water potential, chlorophyll content, proline content and plasma membrane permeability for two species seedlings were measured in different soil drought conditions. The results showed that, on the 9th day of drought stress, the leaf water potential of two species decreased obviously, whereas the free proline content and plasma membrane permeability increased sharply. On the 11th day, the leaf water potential of C. camphora seedlings was lower than that of M. yunnanensis seedlings; the plasma membrane permeability in C. camphora seedling leaves increased much more than that in M. yunnanensis seedling leaves, which showed that the injury to the former by soil drought stress was more severe than that to the latter. The free proline content in M. yunnanensis seedling leaves continued to increase on the 11th day, but that in the C. camphora seedling leaves started to drop obviously, indicating that the reduction of osmotic regulation substance in C. camphora seedling leaves after the 11th day was unable to maintain the osmotic balance between the plasma system and its surroundings and the water loss occurred inevitably. Comprehensively, M. yunnanensis seedlings enhanced the drought-resistance in the course of soil drought stress by maintaining higher leaf water potential and by increasing osmotic regulation substance to promote cell plasma concentration and maintain membrane structure integrity so as to reduce water loss. The subordination function index evaluated with fuzzy mathematic theory also showed that the drought-resistant capacity of M. yunnanensis seedlings was stronger than that of C. camphora seedlings.展开更多
<正>孔月:进入倒计时,就快见面咯!樊战文:从没体验过,30天,4个国家8个城市。这次,一带一路万里行,很有趣。邬树楠:忙碌的季节已经到来刘东:非常兴奋地海淘了,结果运费比买的东西都贵……姬睿:冬天要去北海道看雪!刘旭:做好自己的...<正>孔月:进入倒计时,就快见面咯!樊战文:从没体验过,30天,4个国家8个城市。这次,一带一路万里行,很有趣。邬树楠:忙碌的季节已经到来刘东:非常兴奋地海淘了,结果运费比买的东西都贵……姬睿:冬天要去北海道看雪!刘旭:做好自己的梦,生好现实的活!周默:失陪了范老师我得去构图。余文憬:每次回家乡都会发现它比记忆中的感觉又小了一点马龙:找个热闹的地方逛逛,让心安静下来。丁颖:陀螺模式~张丫丫:to be a better me李思瑾:大家来投稿:)展开更多
孔月:夏天终于开始了,大家要棒棒哒,美美哒!樊战文:世遗影像学!本月招收门徒,关注广告,我在群里等你。邬树楠:深度调整期。王娟:夏天要来啦!刘岩:PM在这个时代更重要。刘可为:Without pain,without sacrifice,we would have nothing。姬...孔月:夏天终于开始了,大家要棒棒哒,美美哒!樊战文:世遗影像学!本月招收门徒,关注广告,我在群里等你。邬树楠:深度调整期。王娟:夏天要来啦!刘岩:PM在这个时代更重要。刘可为:Without pain,without sacrifice,we would have nothing。姬睿:在夕阳下想想自己的人生。刘东:哪能买到细江英公的《蔷薇刑》?刘念:送走了春天。展开更多
基金Supported by Hunan Forestry Scientific Research(2010-07)~~
文摘[Objective] The aim was to explore growth performance of Phoebe bournei in seedling stage.[Method] Based on 17 superior plus trees of Phoebe bournei,a seedling cultivation test was conducted in Jindong Forest Farm in Yongzhou,Hunan Province,exploring growth indices and analyzing seedling height and ground diameter.[Result] As per the selection rate at 20％,PB17,PB9 and PB12 were selected from the 17 species.Specifically,the seedling height averaged 36.52 cm of the selected three seedlings,which was higher by 16.1％ compared with average of 17 species （31.45％）.As for ground diameter,the selected species averaged 2.6 mm,which was higher （13.0％） compared with the average level （2.3 mm）.[Conclusion]Both of seedling height and ground diameter reached extremely significant differences,which indicated that half-sib families of Phoebe bournei have rich variations,with selection and breeding potential.
文摘1.旋姬尺蛾Idaea aversata(Linnaeus)中国新记录。采集记录:2♂♂,甘肃永登吐鲁沟2,200米,1986—V11—18,孟锋采。分布:甘肃;欧洲,小亚细亚,苏联,日本,非洲北部。 2.日本饰毛翅尺蛾Trichopteryxpolycommata anna Inoue中国新记录。
基金This research was supported by Research Fund of Southwest Forestry College (200510)
文摘The soil drought stress experiment in different durations (no watering within 3d, 6d, 9d, 11d individually) was conducted to study the drought-resistant capacity of one-year-old seedlings for the native tree species (Machilus yunnanensis) in Yunnan Province and the introduced tree species (Cinnamomum camphora). The leaf water potential, chlorophyll content, proline content and plasma membrane permeability for two species seedlings were measured in different soil drought conditions. The results showed that, on the 9th day of drought stress, the leaf water potential of two species decreased obviously, whereas the free proline content and plasma membrane permeability increased sharply. On the 11th day, the leaf water potential of C. camphora seedlings was lower than that of M. yunnanensis seedlings; the plasma membrane permeability in C. camphora seedling leaves increased much more than that in M. yunnanensis seedling leaves, which showed that the injury to the former by soil drought stress was more severe than that to the latter. The free proline content in M. yunnanensis seedling leaves continued to increase on the 11th day, but that in the C. camphora seedling leaves started to drop obviously, indicating that the reduction of osmotic regulation substance in C. camphora seedling leaves after the 11th day was unable to maintain the osmotic balance between the plasma system and its surroundings and the water loss occurred inevitably. Comprehensively, M. yunnanensis seedlings enhanced the drought-resistance in the course of soil drought stress by maintaining higher leaf water potential and by increasing osmotic regulation substance to promote cell plasma concentration and maintain membrane structure integrity so as to reduce water loss. The subordination function index evaluated with fuzzy mathematic theory also showed that the drought-resistant capacity of M. yunnanensis seedlings was stronger than that of C. camphora seedlings.
文摘<正>孔月:进入倒计时,就快见面咯!樊战文:从没体验过,30天,4个国家8个城市。这次,一带一路万里行,很有趣。邬树楠:忙碌的季节已经到来刘东:非常兴奋地海淘了,结果运费比买的东西都贵……姬睿:冬天要去北海道看雪!刘旭:做好自己的梦,生好现实的活!周默:失陪了范老师我得去构图。余文憬:每次回家乡都会发现它比记忆中的感觉又小了一点马龙:找个热闹的地方逛逛,让心安静下来。丁颖:陀螺模式~张丫丫:to be a better me李思瑾:大家来投稿:)
文摘孔月:夏天终于开始了,大家要棒棒哒,美美哒!樊战文:世遗影像学!本月招收门徒,关注广告,我在群里等你。邬树楠:深度调整期。王娟:夏天要来啦!刘岩:PM在这个时代更重要。刘可为:Without pain,without sacrifice,we would have nothing。姬睿:在夕阳下想想自己的人生。刘东:哪能买到细江英公的《蔷薇刑》?刘念:送走了春天。
