EFFECT OF LIGHT COMPETITION ON CROWN EXPANSION OF TREES IN A MIXED MULTI STORIED FORESTS

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DANESHVAR A.; RAHMANI R.; HABASHI H.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2007 | Volume:14 | Issue:SUPPLEMENT (SPECIAL ISSUE NATURAL RESURCES) Page(s): 39-48

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Information Journal Paper

Title

EFFECT OF LIGHT COMPETITION ON CROWN EXPANSION OF TREES IN A MIXED MULTI STORIED FORESTS

Author(s)

DANESHVAR A. | RAHMANI R. | HABASHI H. | Issue Writer Certificate

Keywords

LIGHT COMPETITIONQ3

LAYERINGQ3

CROWN EXPANSIONQ3

SELF- PRUNINGQ3

Abstract

Tending operation of forest stands requires an exact understanding and knowledge of the stands natural characteristics and dominance of species in ecosystem. The amount of the light is the most important ecological factor changed by forest tending operations in order to improve the produced wood quality. LIGHT COMPETITION is effective on CROWN EXPANSION and the self-pruning in the forest stands through the light intensity reaching to different stories. The objective of this paper is determination of LIGHT COMPETITION effect on the trees CROWN EXPANSION showing the conditions of photosynthesis, food production, self-pruning and obtaining trunk without branch in different stories. The crown specifications include tree height and trunk heights of 2142 trees were measured in the permanent area in series 1 of Shastkola forest. Beech was the dominant tree and maple was the thickest tree in the study area. The crown radiuses of six tree species (including Beech, Hornbeam, Ironwood, Alder, Maple and Persimmon tree) were measured and their mean was compared in eight cardinal and secondary directions. The CROWN EXPANSION in the northwest direction is more than and in the southeast direction is less than other direction. Beech has a symmetrical crown in the under story because this species is shade tolerant and in the middle story has the maximum crown asymmetry. Unlike beech, hornbeam and ironwood have the maximum crown asymmetry in the under story because they are semi shade tolerant. The effect of LIGHT COMPETITION on self-pruning of tree in beech multistoried forests stand showed that over story trees have the minimum self-pruning and under story trees have the maximum self-pruning. Alder dose the best self-pruning and the maple tree does the worst self-pruning.

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APA: Copy

DANESHVAR, A., RAHMANI, R., & HABASHI, H.. (2007). EFFECT OF LIGHT COMPETITION ON CROWN EXPANSION OF TREES IN A MIXED MULTI STORIED FORESTS. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 14(SUPPLEMENT (SPECIAL ISSUE NATURAL RESURCES)), 39-48. SID. https://sid.ir/paper/8986/en

Vancouver: Copy

DANESHVAR A., RAHMANI R., HABASHI H.. EFFECT OF LIGHT COMPETITION ON CROWN EXPANSION OF TREES IN A MIXED MULTI STORIED FORESTS. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2007;14(SUPPLEMENT (SPECIAL ISSUE NATURAL RESURCES)):39-48. Available from: https://sid.ir/paper/8986/en

IEEE: Copy

A. DANESHVAR, R. RAHMANI, and H. HABASHI, “EFFECT OF LIGHT COMPETITION ON CROWN EXPANSION OF TREES IN A MIXED MULTI STORIED FORESTS,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 14, no. SUPPLEMENT (SPECIAL ISSUE NATURAL RESURCES), pp. 39–48, 2007, [Online]. Available: https://sid.ir/paper/8986/en

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