Abstract
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 Pętkowo, Poland, near Środa 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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Claims 5
Claim · model-written summary
Hemp biomass, straw and cellulose yields were maximal at 30 kg/ha and full bloom.
- Taxon
- Hemp
Cannabis sativa subsp. sativat0 - Treatment
- lower sowing densities (30 kg/ha) harvested at full bloome1
- Outcome
- yields of biomass, straw, cellulosee1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maximum yields of biomass, straw, cellulose, and fiber can be obtained at lower sowing densities (30 kg/ha) harvested at full bloom.”
t0“Industrial Hemp”
Claim · model-written summary
Hemp fiber yield was maximal at 30 kg/ha and full bloom.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- lower sowing densities (30 kg/ha) harvested at full bloome1
- Outcome
- fibere1
- Direction
- maximume1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maximum yields of biomass, straw, cellulose, and fiber can be obtained at lower sowing densities (30 kg/ha) harvested at full bloom.”
t0“Industrial Hemp”
Claim · model-written summary
Hemp seed yields were highest at 10–20 kg/ha and full panicle maturity.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- sown at 10–20 kg/ha and harvested at full maturity of paniclese1
- Outcome
- seede1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“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.”
t0“Industrial Hemp”
Claim · model-written summary
Hemp panicle yields were highest at 10–20 kg/ha and full panicle maturity.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- sown at 10–20 kg/ha and harvested at full maturity of paniclese1
- Outcome
- paniclese1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“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.”
t0“Industrial Hemp”
Claim · model-written summary
The authors recommend revising non-textile hemp sowing norms.
- Taxon
- HempCannabis sativa subsp. sativat0
- Outcome
- norms for sowing hemp for non-textile applications used in agricultural practices require verificatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the norms for sowing hemp for non-textile applications used in agricultural practices require verification to increase yields of raw materials from 1 ha”
t0“Industrial Hemp”
The same questions in other papers
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See all 12 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.