Crown pruning and understory removal did not change the tree growth rate in a Chinese fir (Cunninghamia lanceolata) plantation

2020 ◽  
Vol 464 ◽  
pp. 118056
Author(s):  
Renshan Li ◽  
Jianming Han ◽  
Xin Guan ◽  
Yonggang Chi ◽  
Weidong Zhang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Tree Growth ◽  
Chinese Fir ◽  
Cunninghamia Lanceolata ◽  
Tree Growth Rate

scholarly journals Monthly Radial Growth Model of Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook.), and the Relationships between Radial Increment and Climate Factors

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 757
Author(s):  
Yaqi Huang ◽  
Xiangwen Deng ◽  
Zhonghui Zhao ◽  
Wenhua Xiang ◽  
Wende Yan ◽  
...  
Keyword(s):  
Growth Rate ◽  
Social Status ◽  
Growth Model ◽  
Tree Growth ◽  
Radial Growth ◽  
Chinese Fir ◽  
Cunninghamia Lanceolata ◽  
Radial Increment ◽  
Climate Factors ◽  
Temperature And Precipitation

Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) is the most commonly grown afforestation species in subtropical China. It is essential that we understand the response of radial tree growth to climate factors, yet most experiments have been conducted based on total annual growth and not on monthly dynamics, which alone can detail the influence of climatic factors. In this study, we aimed to: (i) construct a monthly growth model and compare the growth rate of different social statuses of trees, and (ii) determine the response of radial increments of different social statuses to climate factors. The radial growth was monitored monthly during four years using manual band dendrometers (MBD). The data were fitted using the Gompertz function. Within-stand differences in the social status of Chinese firs resulted in growing period and growth rate length variations. The radial growth began in March, and suppressed trees—especially groups of AS1 and BS1 (suppressed trees of classes I in sites A and B)—stopped in September, whereas dominant and intermediate trees were delayed and stopped in November. The periodic monthly increment curve showed double peaks, and the maximum growth rate occurred in April and August. The peak values were affected by social status, which showed that dominant trees had the greatest radial growth rates. S-shaped Gompertz meant that monthly increment models were successfully fitted to our data, which explained more than 98% of the variation in increment data and passed the uncertainty test. Temperature and precipitation had a significant influence on radial growth, and the correlation between radial growth and air temperature was the highest. Our results also revealed that temperatures explain the double-peak features of Chinese fir. The limiting factors of radial growth changed with the seasons and were mainly affected by temperature and precipitation, which should be considered in predicting the response of tree growth to climate change.

Disentangling the role of competition, light interception, and functional traits in tree growth rate variation in South Asian tropical moist forests

2021 ◽  
Vol 483 ◽  
pp. 118908
Author(s):  
Mizanur Rahman ◽  
Masum Billah ◽  
Md Obydur Rahman ◽  
Debit Datta ◽  
Muhammad Ahsanuzzaman ◽  
...  
Keyword(s):  
Growth Rate ◽  
Functional Traits ◽  
South Asian ◽  
Tree Growth ◽  
Light Interception ◽  
Rate Variation ◽  
Tree Growth Rate

Effects of enhanced tree growth rate on the decay capacities of three saprotrophic wood-fungi

2006 ◽  
Vol 232 (1-3) ◽  
pp. 12-18 ◽  
Author(s):  
Mattias Edman ◽  
Rebecca Möller ◽  
Lars Ericson
Keyword(s):  
Growth Rate ◽  
Tree Growth ◽  
Tree Growth Rate

Intra-Ring and Inter-Ring Variations of Tracheid Length in Fast-Grown Versus Slow-Grown Norway Spruces (Picea Abies)

IAWA Journal ◽  
1998 ◽  
Vol 19 (1) ◽  
pp. 3-23 ◽  
Author(s):  
Marc Herman ◽  
Pierre Dutilleul ◽  
Tomas Avella-Shaw
Keyword(s):  
Growth Rate ◽  
Picea Abies ◽  
Frequency Distribution ◽  
Tree Growth ◽  
Slow Growth ◽  
Ring Width ◽  
Fast Growth ◽  
Tracheid Length ◽  
Tree Growth Rate ◽  
The Mean

Our study was conducted on 40 Norway spruces [Picea abies (L.) Karst.] from a stand located in the Belgian Ardennes. Twenty trees were randomly sampled from a slow-growth category, and twenty others from a fast -growth category. The hypothesis under testing is fourfold: increased tree growth rate may affect 1) the intra-ring weighted frequency distribution of tracheid length, 2) the inter-ring variation (from pith to bark) of the parameters describing this frequency distribution, 3) the interring variation of the mean tracheid length, and 4) the correlation between yearly mean tracheid length and yearly ring width.

HEART ROT OF JACK PINE IN ONTARIO: I. THE OCCURRENCE OF BASIDIOMYCETES AND MICROFUNGI IN DEFECTIVE AND NORMAL HEARTWOOD OF LIVING JACK PINE

1966 ◽  
Vol 44 (3) ◽  
pp. 275-295 ◽  
Author(s):  
J. T. Basham
Keyword(s):  
Growth Rate ◽  
Tree Growth ◽  
Pinus Banksiana ◽  
Jack Pine ◽  
Decayed Wood ◽  
Principal Type ◽  
Tree Growth Rate ◽  
Individual Trees ◽  
Stand Conditions

A survey was made of the fungi inhabiting the heartwood of living jack pine (Pinus banksiana Lamb.) in Ontario, particularly in stained and decayed wood. Two Basidiomycetes encountered frequently were Fomes pini (Fr.) Karst., associated with red stain and white pocket rot, and Peniophora pseudo-pini Weres. & Gibson, isolated almost exclusively from stained wood. F. pini was the only fungus consistently associated with white pocket rot, the principal type of heart rot in jack pine. The three most abundant microfungi, a member of the Coryne sarcoides complex, Tympanis hypopodia Nyl., and Retinocyclus abietis (Crouan) Groves & Wells, were encountered frequently in stained wood, but less frequently in decayed and normal wood.Many aspects of the occurrence of these five fungi in jack pine were investigated, including their distribution in the stems and branch stubs of individual trees and their association with normal, stained, and decayed wood therein; and the relation between their occurrence and tree growth rate, various heartwood properties, and different stand conditions. The apparent means by which the fungi enter jack pine, and the possible existence of a succession of fungi in the heartwood of living trees, are discussed.

Effect of growth rate on the natural durability of Douglas-fir in western Europe

2013 ◽  
Vol 43 (10) ◽  
pp. 891-896 ◽  
Author(s):  
C. Pollet ◽  
J.M. Henin ◽  
J. Hébert ◽  
B. Jourez
Keyword(s):  
Growth Rate ◽  
Tree Growth ◽  
Western Europe ◽  
Douglas Fir ◽  
Natural Durability ◽  
Mass Losses ◽  
Poria Placenta ◽  
Recent Species ◽  
Tree Growth Rate ◽  
European Forest

Douglas-fir is a relatively recent species in the central European forest landscape. It is not clear how its natural durability is influenced by silviculture. We therefore investigated how the natural durability of the Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) varies according to tree growth rate; subsequently, the influence of the nature of the wood (juvenile or mature) and radial position was also analyzed. For this purposes, a total of 60 trees grown in Wallonia (Southern Belgium) was felled: these consisted of 6 trees in each of 10 stands where the average tree girth was approximately 150 cm. Since the age of these plantations ranged from 40 to 69 years, the radial tree growth rate ranged between approximately 3 and 7 mm. In all the trees, standardized heartwood test specimens were taken from different radial positions in the butt log. The mass losses caused by the fungi Poria placenta and Coniophora puteana were assessed according to CEN/TS 15083-1 (2005). Poria placenta exhibited a higher decaying efficiency than C. puteana, leading to classify Douglas-fir wood as slightly durable (class 4). No difference was observed between the durability against P. placenta of juvenile and mature wood. Similarly, growth rate seemed to have no direct impact on durability. Durability was, however, significantly correlated with wood density. The effect of site and tree on the natural durability of the wood was also examined.

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