Knowledge Tree
hemp stalk
Also known as: hemp stalks, hemp stems, hemp stem
Facts (11)
Sources
A critical review of industrial fiber hemp anatomy, agronomic ... bioresources.cnr.ncsu.edu 11 facts
measurementDuring the process of separating hemp bast fibers, 15 to 33% of the total hemp stalk mass is converted into hemp fines.
imageA cross-section of a hemp stalk includes xylem and phloem bundles, which can be observed through a microscope when stained with Toluidine blue.
claimHemp hurds account for approximately 70% to 75% of the total hemp stalk weight, yet they are often overlooked as a low-value residue byproduct despite being a sustainable fiber source.
measurementHemp stalk production costs $0.29 per kg for fiber hemp varieties and $0.41 per kg for dual-purpose varieties.
claimDecortication is the process of separating bast fibers from the hurds of the hemp stalk.
claimHemp hurds are the woody interior portions of the hemp stalk that have been broken down into pieces and separated from the bast fibers, according to Xu et al. (2022).
procedureChemical retting involves the use of sodium hydroxide, sodium sulfite, sodium carbonate, and sometimes ethylenediaminetetraacetic acid to break down hemp stems.
claimHammer mills are frequently used to decorticate unretted hemp stalks at high speeds when the goal is to produce low-purity fibers, as this method generates significant amounts of dust and fines.
claimEnzymatic retting is an anthropogenic process that replicates natural field and water retting by using enzymes to act as bacteria to speed up the microbial degradation of hemp stems.
referenceSnegireva, Chernova, Ageeva, Lev-Yadun, and Gorshkova (2015) established that the intrusive growth of primary and secondary phloem fibers in the hemp stem determines the formation and structure of fiber bundles.
measurementWater retting, which involves immersing hemp stalks in large basins of water, takes 5 to 10 days to complete.