摘要
在杉木无性育种中,叶面纯光合效益年是杉木无性系用材林良种选择的主要指标。本次研究主要是了解30a时杉木叶面的纯光合效益年,为杉木无性系用材林良种选择提供理论依据。按树干解析的方式计算22个无性系66株杉木在30a时的木材增长量,并根据当年林木叶面指数估算林木纯光合效益,经方差分析得出:(1)各无性系的材积增长率均值是6.772%、树皮率(中央处)均值是21.45%,各无性系间均没有显著差异;(2)各无性系间30a时材积增长量有极显著差异;(3)各无性系间30a时纯光合效益年有极极显著差异;(4)5种生长级类型无性系的材积增长量与总叶量呈显著或极显著相关;(5) 5种生长级类型无性系的纯光合效益年呈负极极相关;(6)各无性系纯光合效益年均值是:叶面积∶材积=5 468 m^2∶1.0 m^3(范围2 702~17 140 m^2∶1.0 m^3),即5 468 m^2树叶1年的光合作用产物除消耗外还能生产1.0 m^3木材;叶体积∶材积=1.330 m^3∶1 m3(范围0.674~3.730 m^3∶1.0 m^3),即1.330 m3树叶1年的光合作用产物除消耗外还能生产1.0 m3木材;嫩叶鲜重∶木材鲜重=3.088 kg∶1.0 kg (范围1.489~9.606 kg∶1.0 kg),即3.088 kg嫩叶1年的光合作用产物除消耗外还能生产1.0 kg木材(鲜重)。通过本次研究弄清了杉木用材林良种纯光合效益年的量化指标。
The yearly pure photosynthetic efficiency of clonal Chinese fir leaves is one of the main indicators for the selection of clonal superior varieties of Chinese fir timber forest. The purpose of this study was to understand the yearly pure photosynthetic efficiency of Chinese fir in 30 a, and to provide theoretical basis for the selection of clonal superior varieties of Chinese fir timber forest.The wood growth of 66 Chinese fir of 22 clones in 30 a was calculated by stem analysis. According to the wood growth and leaf surface index of the same year, the yearly pure photosynthetic efficiency of the trees was estimated, and the variance analysis of the calculated results of each clone was carried out. The results showed that the average growth rate of volume among clones was 6.772%, the average bark rate(middle part) of each clone was 21.45%,and there was no significant difference among clones.However, there was a significant difference in volume increment of different clones in 30 a. Also, the yearly pure photosynthetic efficiency of 30 a clones differed greatly. In addition, the volume increment of clones with 5 growth grades was significantly or extremely significantly correlated with the total leaf volume. The yearly pure photosynthetic efficiency of 5 growth grades clones was negatively correlated. The yearly average pure photosynthetic efficiency of each clone was as following: when the ratio of leaf area and wood volume was 5 468 m^2∶1.0 m^3(range was 2 702~17 140 m^2∶1.0 m^3), it meant that the photosynthetic product of 5 468 m^2 leaves in one year was 1.0 m^3 wood besides consumption. When the ratio of leaf volume and wood volume was 1.330 m^3∶ 1.0 m^3(range was 0.674~3.730 m^3∶1.0 m^3), it indicated that the photosynthetic product of 1.330 m^3 leaves in one year was 1.0 m^3 wood besides consumption. When the ratio of young leaves fresh weight and wood fresh weight was 3.088 kg∶1.0 kg(range was 1.489~9.606 kg∶1.0 kg), it implied that the photosynthetic product of 3.088 kg leaves in one year was1
作者
高建亮
赵林峰
赵林艳
潘爱娥
Gao Jianliang;Zhao Linfeng;Zhao Linyan;Pan Aie(Hunan Polytechnic of Environment and Biology,Hengyang,421005;Hunan Province Changde City Xiangying Landscaping Co.Ltd.,Changde,415000)
出处
《分子植物育种》
CAS
CSCD
北大核心
2020年第20期6903-6914,共12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。
关键词
杉木
用材林
良种
纯光合效益年
估算
Chinese fir
Timber forest
Superior varieties
Yearly pure photosynthetic efficiency
Estimation
