Chemical composition of decomposing stumps in successive rotation of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) plantations

2005 ◽  
Vol 50 (22) ◽  
pp. 2581
Author(s):  
Zhiqun HUANG
Keyword(s):  
Chemical Composition ◽  
Chinese Fir ◽  
Cunninghamia Lanceolata ◽  
Successive Rotation

Chemical Characteristics of Heartwood and Sapwood of Red-Heart Chinese Fir (Cunninghamia lanceolata)

2019 ◽  
Vol 69 (2) ◽  
pp. 103-109
Author(s):  
Yanfei Li ◽  
Xiangwen Deng ◽  
Yifei Zhang ◽  
Yaqi Huang ◽  
Chenyang Wang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Chemical Constituents ◽  
Wood Property ◽  
Tree Height ◽  
Chinese Fir ◽  
International Standards ◽  
Cunninghamia Lanceolata ◽  
Jiangxi Province ◽  
Chemical Compositions ◽  
Ph Values

Abstract The chemical composition of wood is an important factor affecting the properties and utilization of wood. To compare the difference in chemical compositions between heartwood and sapwood of red-heart Chinese fir (Cunninghamia lanceolata), three graded wood, dominant, average, and overtopped trees were selected from the Chenshan Forest Station of Anfu County in Jiangxi Province. Their chemical composition parameters were determined according to international standards. Our results indicate that sapwood contains on average a higher moisture content than that of heartwood, constituting 9.4 and 8.6 percent, respectively. The pH values of wood present acidic and are higher in sapwood. Cellulose is abundant in both wood tissues; the heartwood content (52.0%) is higher than that of sapwood (48.6%) on average. Furthermore, the lignin in heartwood is slightly less than that of sapwood. Hemicellulose content is similar in heartwood and sapwood (23.4% vs. 23.1%), on average. All kinds of extractives in heartwood are substantially richer. Approximately three times more benzene–ethanol extractives are in heartwood than sapwood. This suggests that there is a considerable variation of chemical constituents among the graded woods (P < 0.05). The pH values are both significantly correlated with the contents of the four extractives in heartwood and sapwood (P < 0.05). The longitudinal variation of chemical compositions is different along the direction of tree height in heartwood and sapwood. Understanding the chemical heterogeneity of wood is vital for wood product manufacturing as well as for wood property improvement.

Age-dependent microRNAs in regulation of vascular cambium activity in Chinese fir (Cunninghamia lanceolata)

Trees ◽  
2021 ◽  
Author(s):  
Guijun Liu ◽  
Xian Xue ◽  
Jinling Feng ◽  
Dechang Cao ◽  
Jinxing Lin ◽  
...  
Keyword(s):  
Chinese Fir ◽  
Cunninghamia Lanceolata ◽  
Vascular Cambium ◽  
Age Dependent ◽  
Cambium Activity

Genetic parameters and genotype–environment interactions of Chinese fir (Cunninghamia lanceolata) in Fujian Province

2014 ◽  
Vol 44 (6) ◽  
pp. 582-592 ◽  
Author(s):  
Liming Bian ◽  
Jisen Shi ◽  
Renhua Zheng ◽  
Jinhui Chen ◽  
Harry X. Wu
Keyword(s):  
Genetic Parameters ◽  
Breeding Strategy ◽  
Chinese Fir ◽  
Breeding Program ◽  
Cunninghamia Lanceolata ◽  
Environment Interaction ◽  
Fujian Province ◽  
The Third ◽  
Genotype Environment Interaction ◽  
Sib Families

Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) is the most commercially important conifer in China, and the Nanjing Forestry University – Fujian Province Chinese fir Cooperation (NJFU – Fujian Cooperation) breeding program has advanced it into the third cycle of selection and breeding. In this paper, we estimated genetic parameters from four sites for 80 half-sib families and summarized previous estimates of genetic parameters in Chinese fir with an objective to propose optimal breeding strategy. Heritability averaged 0.20 and 0.14 for height and diameter at breast height (DBH), respectively, for the four sites. A significant genotype–environment interaction (G × E) for growth was also observed among the four sites, with the greatest interactions between a marginal site and the three central sites in the Fujian Province Chinese fir plantation region. The average estimated type-B genetic correlation between the marginal site and the three central sites was 0.08 for height and –0.09 for DBH. However, the highly productive families were among the most stable across the four sites. The results from this study in combination with summarized genetic parameters from literature were used to discuss and propose an optimal breeding strategy for the third generation of the breeding program for Chinese firs in Fujian Province.

scholarly journals Optimization of hormone combinations for root growth and bud germination in Chinese fir (Cunninghamia lanceolata) clone leaf cuttings

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Shubin Li ◽  
Peng Huang ◽  
Guochang Ding ◽  
Lili Zhou ◽  
Piao Tang ◽  
...  
Keyword(s):  
Root Growth ◽  
Chinese Fir ◽  
Cunninghamia Lanceolata

scholarly journals Analysis and Olfactory Description of Four Essential Oils from Vietnam

2016 ◽  
Vol 11 (10) ◽  
pp. 1934578X1601101
Author(s):  
Erich Schmidt ◽  
Le T. Huong ◽  
Do N. Dai ◽  
Tran D. Thang ◽  
Juergen Wanner ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Volatile Compounds ◽  
The Other ◽  
Cunninghamia Lanceolata ◽  
Total Composition ◽  
Type Apparatus

The present study evaluates the chemical composition and olfactory description of the essential oils of Asarum glabrum Merr., Calocedrus macrolepis Kurz, Cunninghamia lanceolata (Lamb.) Hook. and Glyptostrobus pensilis (Stainton ex D. Don) K. Koch. The essential oils were obtained by hydrodistillation in a Clevenger-type apparatus and analyzed by GC-FID and GC-MS. Concerning their chemical composition, 66, 42, 57 and 21 volatile compounds were identified from dried leaves in the case of Asarum glabrum Merr. and wood for the other three, representing 98.7%, 67.2%, 92.0% and 87.5 % of the total composition, respectively. The main compounds of Asarum glabrum oil were safrole (38.1%), apiole (10.8%) and myristicin (8.0%); of Calocedrus macrolepis verbenone (9.3%), piperitone (8.6 %), α-terpineol (6.0%) and ( Z)-β-terpineol (5.3%); of Cunninghamia lanceolata oil cedrol (26.3%), α-terpineol (24.1%) and camphor (7.0%); and of Glyptostrobus pensilis oil dihydro-eudesmol isomer (assumed) (18.3%), cedrol (16.4%), occidentalol (13.2%) and elemol (9.0%).

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