Several Important Diseases of Chinese Fir Plantations and their Control Measures

2011 ◽  
Vol 480-481 ◽  
pp. 727-732
Author(s):  
He Li ◽  
Guo Ying Zhou
Keyword(s):  
Disease Control ◽  
Southern China ◽  
Chinese Fir ◽  
Control Measures ◽  
Cunninghamia Lanceolata ◽  
Timber Species ◽  
Healthy Development ◽  
Fast Growing ◽  
Important Basis ◽  
Chinese Fir Plantation

Chinese fir (Cunninghamia Lanceolata) is a unique fast growing merchantable timber species in China with good materials, and is a major fast growing timber species in provinces of southern China. With the increase in Chinese fir plantation areas and the improvement in the degree of pure forests, the diseases of Chinese fir are increasing and their damages are getting worse, which have caused great losses and affected the sustainable, rapid and healthy development of forestry in China. This article gives a description of pathogenies, symptoms and occurrence regularities of four important diseases of Chinese fir, including Glomerella cingulata, Pestalotia Sp., Pseudomonas cunninghamiae and Chlorosis, and puts forward the corresponding control measures of these diseases, which provides an important basis for disease control of Chinese fir plantations.

scholarly journals Shoot Blight on Chinese Fir (Cunninghamia lanceolata) is Caused by Bipolaris oryzae

Plant Disease ◽  
2018 ◽  
Vol 102 (3) ◽  
pp. 500-506 ◽  
Author(s):  
Lin Huang ◽  
Ya-Nan Zhu ◽  
Ji-Yun Yang ◽  
De-Wei Li ◽  
Yong Li ◽  
...  
Keyword(s):  
Southern China ◽  
Phylogenetic Analyses ◽  
Large Subunit ◽  
Elongation Factor ◽  
Morphological Characteristics ◽  
Chinese Fir ◽  
Cunninghamia Lanceolata ◽  
Timber Species ◽  
Bipolaris Oryzae ◽  
Shoot Blight

Chinese fir (Cunninghamia lanceolata) is a significant timber species that has been broadly cultivated in southern China. A shoot blight disease on Chinese fir seedlings was discovered in Fujian, China and a fungus was then consistently associated with the symptoms. This fungus was determined to be causing this disease, among others by fulfilling Koch’s postulates. Based on morphological characteristics and multilocus phylogenetic analyses with the sequences of the internal transcribed spacer, partial glyceraldehyde-3-phosphate dehydrogenase gene, partial translation elongation factor 1-α gene, and partial 28S large subunit ribosomal RNA gene, the fungus was identified as Bipolaris oryzae. These characteristics and phylogenetic analyses clearly support that this pathogen is different from B. sacchari, which was, until now, considered to be the causal agent of a similar blight on Chinese fir in Guangdong, China. The fungus was also shown to be strongly pathogenic to rice, one of the most susceptible hosts to B. oryzae. Crop rotation involving rice is often carried out with Chinese fir in southern China, a practice that most likely increases the risk of shoot blight on C. lanceolata. To our knowledge, shoot blight caused by B. oryzae is reported for the first time in a gymnosperm species.

scholarly journals Stand Transpiration Estimates from Recalibrated Parameters for the Granier Equation in a Chinese Fir (Cunninghamia lanceolata) Plantation in Southern China

Forests ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 162 ◽  
Author(s):  
Shuai Ouyang ◽  
Kaiyu Xiao ◽  
Zhonghui Zhao ◽  
Wenhua Xiang ◽  
Chuanhong Xu ◽  
...  
Keyword(s):  
Southern China ◽  
Chinese Fir ◽  
Cunninghamia Lanceolata ◽  
Stand Transpiration

scholarly journals An Assessment of Stumpage Price and the Price Index of Chinese Fir Timber Forests in Southern China Using a Hedonic Price Model

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 436
Author(s):  
Hong Chen ◽  
Zhongsheng He ◽  
Wei Hong ◽  
Jinfu Liu
Keyword(s):  
Price Index ◽  
Prediction Models ◽  
Southern China ◽  
Chinese Fir ◽  
Stand Age ◽  
Timber Species ◽  
Annual Growth Rate ◽  
Hedonic Price ◽  
Logarithmic Form ◽  
Stumpage Price

Research Highlights: Stumpage price is the most important factor affecting the value of forests. Therefore, an understanding of the factors affecting stumpage prices and trends is critical for effective forest management. Background and Objectives: Chinese fir is the most important fast-growing timber species in China, it is also the tree species with the largest trading volume in the stumpage markets of Southern China. The aim of this study was to analyze the determinants and trends of stumpage prices for Chinese fir timber forests. Materials and Methods: Data on 928 sales of Chinese fir timber forests transacted between 2007 and 2016 were gathered from the stumpage markets in Southern China. We analyzed the relationship between stumpage prices and sales characteristics using the hedonic price method (HPM) and measured the stumpage price index with a dummy time hedonic index. Results: (1) The double logarithmic form of the HPM yielded a more accurate estimate than the semi logarithmic form. The R2ad values in the nine annual prediction models were all above 80%. Stock volume made the greatest contribution to stumpage price, followed by stand age. Stand area had no significant impact on the stumpage price. (2) Stumpage prices of Chinese fir timber forests fluctuated greatly, especially in 2010 and 2015 when the sequential price indexes were 180.01% and 74.95%, respectively. Taking 2007 as the baseline, we calculated the base price index in 2016 to be 197%, with an average annual growth rate of 7.82%. (3) The stumpage market was associated with a higher degree of risk than the timber market. Conclusions: Our findings provide valuable inputs that can guide and facilitate the Chinese government’s efforts to optimize resource allocation and standardize the stumpage market.

scholarly journals Screening, Identification and Growth-Promotion Products of Multifunctional Bacteria in a Chinese Fir Plantation

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 120
Author(s):  
Guangyu Zhao ◽  
Yihui Wei ◽  
Jiaqi Chen ◽  
Yuhong Dong ◽  
Lingyu Hou ◽  
...  
Keyword(s):  
High Efficiency ◽  
Growth Promotion ◽  
Nitrogenase Activity ◽  
Acc Deaminase ◽  
Inorganic Phosphorus ◽  
Chinese Fir ◽  
Biochemical Tests ◽  
Growth Promoting ◽  
Chinese Fir Plantation ◽  
Physiological And Biochemical

Purpose: This research was aimed to screen and identify multifunctional phosphorus-dissolving bacteria of a Chinese fir (Cunninghamia lanceolata) plantation and study its phosphorus-dissolving characteristics in order to provide strain resources and a theoretical basis for developing the appropriate bacterial fertilizer of a Chinese fir plantation. Methods: First, phosphorus-dissolving bacteria were isolated from the woodland soil of a Chinese fir plantation by Pikovskava inorganic phosphorus medium (PVK). Then, some growth-promoting indicators of primary screening strains were determined, including the capacity of phosphorus-solubilized, nitrogenase activity, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, production of indole-3-acetic acid (IAA), secretion of iron carrier and so on. Finally, the screening multifunctional phosphorus-dissolving bacteria were identified, which were combined with colony characteristics, physiological and biochemical tests and molecular biotechnology. Results: (1) Thirteen phosphorus-dissolving bacteria were isolated and screened in total, and P5 (195.61 mg·L−1) had the strongest capacity of phosphorus-solubilized. Five phosphorus-dissolving bacteria were provided with nitrogenase activity, and the highest activity of nitrogenase was P10 and P5 (71.90 C2H4 nmol·mL−1·h−1 and 71.00 C2H4 nmol·mL−1·h−1, respectively). Four strains were provided with ACC deaminase activity, and the highest activity of ACC deaminase was P5 and P9, (0.74 μmol·mg−1·h−1 and 0.54 μmol·mg−1·h−1, respectively). Most strains could secrete IAA, and three strains of bacteria had a strong secretory ability, which could secrete IAA with a concentration greater than 15 mg·mL−1, and P5 was 18.00, P2 was 17.30, P6 was 15.59 (mg·mL−1). P5 produced carriers of iron better than others, and the ratio of the diameter of the iron production carrier ring to the diameter of the colony was 1.80, respectively, which was significantly higher than other strains. Combining all kinds of factors, P5 multifunctional phosphorus-dissolving bacteria were screened for eventual further study. (2) Strain P5 was identified as Burkholderia ubonensis, based on the colony characteristics, physiological and biochemical tests, 16SrDNA sequence analysis and phylogenetic tree construction. Conclusion: P5 has a variety of high-efficiency growth-promoting capabilities, and the ability to produce IAA, ACC deaminase activity and siderophore performance are significantly higher than other strains, which had great potential in the development of microbial fertilizer.

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