Influence of Hemp Plant Eccentric Growth on Physical Properties and Chemical Compounds of Hemp Hurd

Xiaoping Li, Ning Wu, Jeffery J. Morrell, Guanben Du, Zhengjie Tang, Zhangkang Wu, Chenggang Zou

Abstract


The directions of South, North, West, and East had no significant influence on hemp hurd thickness (p > 0.05) based on the data from 100 hemp plants measured and oriented in different directions. As the hemp hurd grew, the thickness of the plants at different orientations also changed. The pectin and ash content in the wide areas were higher than those in the narrow areas. The lignin, holocellulose, alpha cellulose, and hemicellulose content in the wide areas were lower than those in the narrow areas (p = 0.05) in different hemp plants of different genders and plant densities. Additionally, the cell numbers in the wide areas were higher than those in the narrow areas in different locations of hemp plants, of different genders, and varied plant densities (p < 0.05). Thus, the formation of the narrow areas and wide areas in the hemp hurd were caused by the division difference of cambium. The plant hormones were the main influence on the division of cambium. Three particular plant hormones cytokinin (CTK), abscisic acid (ABA), and auxin (IAA) in the wide areas of hemp plants were higher than those in the narrow areas of plants of different genders and plant densities (p < 0.05). The eccentricity had a great influence on the physical and chemical properties of hemp hurd.

Keywords


Hemp hurd thickness; Pectin content; Lignin content; Plant hormones; Cell numbers in cross section

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