Skip to main content

Growth of first-order branches in Betula platyphylla saplings as related to the age, position, size, angle, and light availability of branches

Buy Article:

$50.00 plus tax (Refund Policy)

Abstract:

The growth of first-order branches was measured in 25 saplings of Betula platyphylla Sukatchev var. japonica Hara growing under various light conditions in northern Hokkaido, northern Japan, and the effect of age, tip height, length, and angle of branches and light availability at the branch tips on branch growth were examined. Branch growth was evaluated as the total biomass growth of current-year long shoots within a first-order branch (TBG), the number of long shoots currently produced by the first-order branch (CSN), and the mean biomass of current-year long shoots within the first-order branch (MSG). In general, TBG, CSN, and MSG were negatively dependent on branch age and positively dependent on height, length, angle (from the horizontal), and light availability of the branch. The relationships between each of TBG, CSN, and MSG and the independent variables were individual specific. The dependency of TBG, CSN, and MSG on the light availability at the branch tips was affected by the maximum light availability at the individual level, suggesting that branch growth is affected not only by branch-level resources but also by conditions at the individual level. Based on these results, two concepts for understanding branch growth, branch autonomy and correlative inhibition, were discussed, and prediction models for TBG, CSN, and MSG were presented.

La croissance des branches du premier ordre a été mesurée sur 25 gaules de Betula platyphylla Sukatchev var. japonica Hara croissant dans des conditions variables de lumière dans le nord de Hokkaido, au nord du Japon. L'effet de l'âge, de la hauteur de l'apex, de la longueur et de l'angle d'élévation des branches ainsi que de la lumière disponible à l'apex des branches sur la croissance des branches a été examiné. La croissance des branches a été assimilée à celle de la biomasse totale des rameaux longs de l'année (CBT), au nombre de rameaux longs de l'année produits par une branche du premier ordre (NRA) et à la biomasse moyenne des rameaux longs de l'année de la branche de premier ordre (BMR). De façon générale, CBT, NRA et BMR dépendaient négativement de l'âge de la branche et positivement de la hauteur, de la longueur, de l'angle d'élévation de la branche et de la lumière disponible. Les relations entre CBT, NRA, BMR et les variables indépendantes étaient spécifiques à chaque individu. La relation entre CBT, NRA, BMR et la lumière disponible à l'apex des branches changeait avec la quantité maximale de lumière disponible au niveau individuel, suggérant que la croissance des branches est affectée non seulement par les ressources au niveau de la branche mais aussi par les conditions spécifiques à chaque individu. Sur la base de ces résultats, deux concepts utiles à la compréhension de la croissance des branches, c'est-à-dire l'autonomie de la branche et l'inhibition corrélative, sont abordés et des modèles de prédiction pour CBT, NRA et BMR sont présentés.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: July 1, 2003

More about this publication?
  • Published since 1971, this monthly journal features articles, reviews, notes and commentaries on all aspects of forest science, including biometrics and mensuration, conservation, disturbance, ecology, economics, entomology, fire, genetics, management, operations, pathology, physiology, policy, remote sensing, social science, soil, silviculture, wildlife and wood science, contributed by internationally respected scientists. It also publishes special issues dedicated to a topic of current interest.
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • Sample Issue
  • Reprints & Permissions
  • Ingenta Connect is not responsible for the content or availability of external websites
nrc/cjfr/2003/00000033/00000007/art00013
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more