摘要
为明确杉木单株叶面数值与杉木生长态势之间是否存在直接的关系,本研究共测算了22个杉木无性系品种30a时的单株叶面各种数据。依据试验地131个杉木无性系品种近5年的生长状况,按"克拉大特法"将它们分成优良、次优、中等、次差和差5个林木生长等级,并根据"克拉大特法"原则(样本选择>10%)按2∶5∶8∶5∶2的方法分别从5个生长等级中选择22个杉木无性系品种,又从每一个无性系品种中选取3株平均木(样木)再选择有代表性的叶片进行量测。对66株30a样木测算后得出:(1)杉木成熟叶平均单叶长为38.18 mm、宽为2.43 mm、厚为0.246 mm;(2)成熟叶平均千叶重为38.55 g;(3)平均单株嫩叶总鲜重为37.22 kg;(4)平均单株总叶量为96.310万片、总叶面积为89.400 m2、总叶体积为0.022 05 m3。对22个无性系品种30a的叶面数据经方差分析得出:(1)各品种之间单叶的长、宽、厚无显著差异;(2)各品种之间的千叶重有一定的差异但不显著;(3)各品种之间的单株总叶量有显著差异。对22个无性品种30a的生长态势与叶面数据的相关性分析得出:(1)单株总叶量以115万片为临界线,在单株总叶量<115万的情况下,单株总叶量越低其林木的生长等级就越差;(2)单株总叶量>115万,数值越大其生长等级更差。根据以上分析,本研究认为:在杉木无性育种过程中,纯光合效益是杉木用材林良种选择的重点,而叶面数据只作参考。研究结果可为无性育种中杉木用材林良种选择提供依据。
In order to clarify whether there was an intuitive relationship between the leaf surface value of individual Chinese fir and its growth situation, the average leaf data of 22 Chinese fir clones in 30 a stand were calculated in this study. According to the principle of "Kratat method"(sample selection more than 10%), 22 clones were selected from 5 growth grades by 2:5:8:5:2 method, and the representative leaf surfaces were selected for measurement which were from 3 sample trees selected from each clone. After calculating 66 sample trees, it is concluded that:(1) the average length, width and thickness of mature leaves of Chinese fir are 38.18 mm, 2.43 mm and 0.246 mm;(2) the average thousand-leaf weight of mature leaves was 38.55 g;(3) the average fresh weight of young leaves per plant was 37.22 kg;(4) the average total leaf volume per plant was 0.963 10 million leaves, total leaf area was 89.400 m2,and total leaf volume was 0.022 05 m3. The leaf surface data of 22 clones were analyzed by variance analysis. The results showed that:(1) there was no significant difference in the length, width and thickness of mature single leaf among varieties;(2) there was no significant difference in the thousand-leaf weight of mature leaves among varieties;and(3) there was significant difference in the total leaf volume per plant among varieties. The correlation analysis between the growth situation of 22 clonal varieties and leaf surface data showed that:(1) when the total leaf quantity of a Chinese fir is less than 1.15 million, the lower the total leaf quantity per plant of a Chinese fir variety, the worse its growth grade;(2) if the total leaf quantity per plant of a Chinese fir variety is more than 1.15 million, the higher its value, the worse its growth grade will be. Based on the above analysis, this study concluded that: in the process of Chinese fir clonal breeding, the pure photosynthetic efficiency was the focus of selection of improved varieties of Chinese fir timber forest, while leaf surface data was only for reference. This result provided a basis for the selection of improved varieties of Chinese fir timber forest in asexual breeding.
作者
高建亮
潘爱娥
赵林峰
赵林艳
Gao Jianliang;Pan Aie;Zhao Linfeng;Zhao Linyan(Hunan Polytechnic of Environment and Biology,Hengyang,421005;Hunan Province Yongzhou City Xiangying Landscaping Co.Ltd.,Changde,415000)
出处
《分子植物育种》
CAS
CSCD
北大核心
2019年第20期6909-6917,共9页
Molecular Plant Breeding
基金
湖南省教育厅(2017C0564)
湖南省普通高校青年骨干教师项目(湘教通(2018)574号)
湖南省林业科技创新杰出青年项目
湖南环境生物职业技术学院“支柱工程”项目共同资助
