Morphological characteristics and chemical components of sunflower stalk (Helianthus annus. cheernianka 66) cultivated in Astara

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ATAROD M.; TABEI A.

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Journal Paper

Paper Information

Journal: Iranian Journal of Wood and Paper Science Research Year:2019 | Volume:34 | Issue:3 (68) Page(s): 372-386

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Title

Morphological characteristics and chemical components of sunflower stalk (Helianthus annus. cheernianka 66) cultivated in Astara

Author(s)

ATAROD M. | TABEI A. | Issue Writer Certificate

Keywords

Sunflower stalkQ1

fibers dimensionsQ3

biometric coefficientsQ1

chemical componentsQ2

agricultural residuesQ1

Abstract

This study was conducted to determine the morphological characteristics and chemical components of Sunflower stalks (Helianthus annus. Var, cheernianka 66) cultivated in Astara area. After collecting the stalks, 6 stalks of the same size were selected to determine the morphological characteristics and remaining stalks were used to determine the chemical components. Morphological tests were performed to determine fibers dimensions and biometric coefficients by sampling at 3 heights of stalks (5%, 50% and 75%). Maceration of fibers was done by Franklin method. Measurement of chemical components was performed on the basis of TAPPI standard test methods on stalks with and without bark. The total average of fiber length, fiber diameter, lumen diameter and fiber wall thickness were measured for this stalk as 663 µ m, 29. 8 µ m, 25. 18 µ m and 2. 336 µ m respectively. The total average of slenderness coefficient, flexibility coefficient and Runkel index of fibers were calculated as 22. 68, 84. 259 and 0. 188 respectively. Average percentage of cellulose, lignin, acetone extractives, alcohol extractives, hot water extractives and ash for this stalk were measured as 40. 066, 22. 758, 3. 953, 1. 86, 2. 186 and 3. 208, respectively. The results showed that fibers length increased with increasing the stalk height, but this increasing was not significant. Fibers diameter, lumen diameter and fibers wall thickness decreased with increasing of stalk height, and this decreasing was significant for fibers diameter and lumen diameter in the height of 75%, but it was not significant for fibers wall thickness. Also, the results showed that bark has significant effect on all of the chemical components, and the stalk with bark has lower cellulose and more lignin, extractives and ash compared with the stalk without bark.

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APA: Copy

ATAROD, M., & TABEI, A.. (2019). Morphological characteristics and chemical components of sunflower stalk (Helianthus annus. cheernianka 66) cultivated in Astara. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 34(3 (68) ), 372-386. SID. https://sid.ir/paper/396603/en

Vancouver: Copy

ATAROD M., TABEI A.. Morphological characteristics and chemical components of sunflower stalk (Helianthus annus. cheernianka 66) cultivated in Astara. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH[Internet]. 2019;34(3 (68) ):372-386. Available from: https://sid.ir/paper/396603/en

IEEE: Copy

M. ATAROD, and A. TABEI, “Morphological characteristics and chemical components of sunflower stalk (Helianthus annus. cheernianka 66) cultivated in Astara,” IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, vol. 34, no. 3 (68) , pp. 372–386, 2019, [Online]. Available: https://sid.ir/paper/396603/en

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