Plant anatomy as a tool for evaluating the effect of different levels of nitrogen, plant population density, row spacing and irrigation on kenaf (Hibiscus cannabinus) fibre development
Abstract:Kenaf provides high quality fibre which is used in paper making, building materials and absorbents. The study aims were to conduct a proper anatomical study of fibre development in kenaf stems, and to investigate if the number of fibre wedges, fibre rings (layers) and fibre bundles can be used as a tool to determine fibre development response to different agronomic practices. The practices evaluated included different nitrogen levels (0, 50, 100 and 150 kg ha-1 N) under both rainfed and irrigated conditions, a… Show more
“…The xylem is much wider. 21,51,52 The xylem conducts the raw sap, a liquid containing water and mineral salts drawn from the soil by the roots at the level of the piliferous layer, towards the leaves where photosynthesis takes place. The pith (medullary parenchyma) is rounded cells occupying the center of the stem with the presence of meatuses.Figure 4.A cross section of a stem shows phloem (cellulosic fibers) and Xylem (lignified fibers) arranged in a ring around the periphery.…”
The main goal of this study is to characterize natural lignocellulosic fibers extracted from Malva Sylvestris. The experimental approach used is consisted to analyze the morphological, physical, chemical, thermal and mechanical characteristics of Malva sylvistris fibers. The stem anatomy showed that the bark of Malva is rich in fiber cells. Based on ATR-FTIR and X-ray analysis, the obtained results illustrated that the fiber contained mainly cellulose, hemicellulose and lignin. The crystallinity index of fiber is about 55.12 %, which indicated a high cellulose content. The Thermo-gravimetric analysis (TGA) analysis test point out that Malva Sylvestris fibers are thermally stable until 225°C and an apparent activation energy about of 111 kJ.mol−1 was recorded. Tensile strength of Malva fibers is about of 236.64 ± 93.33 MPa whilst its young’s modulus is about of 26.07 ± 5.14 GPa. In view of the dispersion in the obtained experimental results, the latter were analyzed using the Weibull statistical laws with two parameters.
“…The xylem is much wider. 21,51,52 The xylem conducts the raw sap, a liquid containing water and mineral salts drawn from the soil by the roots at the level of the piliferous layer, towards the leaves where photosynthesis takes place. The pith (medullary parenchyma) is rounded cells occupying the center of the stem with the presence of meatuses.Figure 4.A cross section of a stem shows phloem (cellulosic fibers) and Xylem (lignified fibers) arranged in a ring around the periphery.…”
The main goal of this study is to characterize natural lignocellulosic fibers extracted from Malva Sylvestris. The experimental approach used is consisted to analyze the morphological, physical, chemical, thermal and mechanical characteristics of Malva sylvistris fibers. The stem anatomy showed that the bark of Malva is rich in fiber cells. Based on ATR-FTIR and X-ray analysis, the obtained results illustrated that the fiber contained mainly cellulose, hemicellulose and lignin. The crystallinity index of fiber is about 55.12 %, which indicated a high cellulose content. The Thermo-gravimetric analysis (TGA) analysis test point out that Malva Sylvestris fibers are thermally stable until 225°C and an apparent activation energy about of 111 kJ.mol−1 was recorded. Tensile strength of Malva fibers is about of 236.64 ± 93.33 MPa whilst its young’s modulus is about of 26.07 ± 5.14 GPa. In view of the dispersion in the obtained experimental results, the latter were analyzed using the Weibull statistical laws with two parameters.
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