New Technology of Harvesting Hemp Grown for Seed

Burczyk, H.; Kaniewski, Ryszard

doi:10.1300/j237v10n01_05

Cited by 3 publications

(1 citation statement)

References 1 publication

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“…Hemp cultivated in Europe and America is grown mainly for short fiber application and medicinal ingredient extraction, and hemp harvesters include stem-leaf harvesters, stalk harvesters, stem-leaf-seed harvesters, etc. [3][4][5] . In China, hemp is grown mainly for long fiber textile, and the whole stalk is cut by hemp harvester and then evenly and neatly laid out in the field for drying [6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Formation mechanism for the laying angle of hemp harvester based on ANSYS-ADAMS

Huang,

Tan,

Tian

et al. 2023

International Journal of Agricultural and Biological Engineering

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Aiming at the problem of large differences in the laying angle and posture of plants cut by the hemp harvester, which is unfavorable for the subsequent picking-up, this paper analyzed the laying process and laying angles, and built a conveyorplant rigid-flexible coupling model for simulating the laying of hemp plant. Moreover, the operating parameters were tested and optimized based on the central composite design theory, and carried out multi-objective optimization with the minimum laying angle as the response index. Firstly, the formation mechanism of the laying angle of hemp harvester was studied. Secondly, a test was designed with the quadratic orthogonal rotational combination test method, with the data being processed by Design-Expert. A regression mathematical model of the laying angle was built, and the influence of the interactions between factors on the laying angle was analyzed with the response surface method. Furthermore, multi-objective optimization was conducted on the regression model according to the actual production design requirements. As a result, the best combination was obtained, that is, when the forward speed is 0.7 m/s, speed ratio 1.40, and stubble height 95 mm, the minimum laying angle can be obtained, namely 124.9°. The optimization parameters were verified by the simulation and field tests. The simulation test showed that the simulated laying angle is 125.2°, with a relative error of 0.24% from the theoretical value, under the best combination of parameters. The field test showed that the average laying angle of hemp plant is 121.8°, with a relative error of 2.5% from the theoretical value, under the best combination of parameters. The results may provide a reference for the structural improvement and operating parameter control of hemp harvesters.

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Section: Introductionmentioning

confidence: 99%

Formation mechanism for the laying angle of hemp harvester based on ANSYS-ADAMS

Huang,

Tan,

Tian

et al. 2023

International Journal of Agricultural and Biological Engineering

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Hemp – Cultivation, Extraction and Processing

Amaducci

Gusovious

2010

Industrial Applications of Natural Fibres

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Effect of Sowing Density and Date of Harvest on Yields of Industrial Hemp

Burczyk

Grabowska

Strybe

et al. 2009

Journal of Natural Fibers

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Hemp grown for textile applications must be sown at high densities (60-80 kg/ha) and harvested early to obtain fiber of high quality, and the interest in cultivating industrial hemp used for non-textile applications is growing. Broadening the use of hemp as a raw material for specific industrial products and obtaining maximum yields calls for revision of current sowing densities and harvest dates. Therefore, two experiments (A + B) have been carried out in 2004-2006 at the INF Experimental Farm in Petkowo, Poland, near 1roda Wielkopolska. In experiment A, four sowing densities of hemp grown for biomass, straw, panicles, and seed were tested (30, 40, 50, 60 kg/ha). In experiment B, lower sowing densities were compared for hemp grown for seed, panicles, and straw (5, 10, 15, 20 kg/ha). In both experiments, plants were harvested at three periods: beginning of panicle forming, full bloom, and full seed maturity. Panicles were harvested for essential oils. Results of field and laboratory testing confirmed a hypothesis that maximum yields of biomass, straw, cellulose, and fiber can be obtained at lower sowing densities (30 kg/ha) harvested at full bloom. When growing hemp for seed or panicles, the highest yields were obtained when hemp was sown at 10-20 kg/ha and harvested at full maturity of panicles. Following the results of the study, the norms for sowing hemp for non-textile applications used in agricultural practices require verification to increase yields of raw materials from 1 ha and to improve competitiveness of industrial products.

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New Technology of Harvesting Hemp Grown for Seed

Cited by 3 publications

References 1 publication

Formation mechanism for the laying angle of hemp harvester based on ANSYS-ADAMS

Formation mechanism for the laying angle of hemp harvester based on ANSYS-ADAMS

Hemp – Cultivation, Extraction and Processing

Effect of Sowing Density and Date of Harvest on Yields of Industrial Hemp

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