Abstract
Relevance. In connection with the widespread introduction of monoecious hemp varieties into the production, it became necessary to study issues related to the effect of seeding rates on productivity and product quality. In particular, it was necessary to study the effect of seeding rates on the yield and quality of seeds, the characteristics of plant growth and development. In addition, it was important for production to establish the effect of the seeding rate on the yield of seeds, stems and fiber, on the technological qualities of the fiber and the sowing qualities of seeds. Methods. A comparative study was carried out in 2000–2015 on the experimental plots of the Chuvash Research Institute of Agriculture. The sown area of each experimental plot was 20 m2, accounting — 18 m2, the repetition of the experiment was four times. Observations of the growth and development of plants were carried out according to the methodology adopted at the Institute of Bast Crops. Results. It has been established that the density of the stem stand increases with an increase in the seeding rate for all sowing methods, both on an unfertilized and fertilized background. On a fertilized background with the same seeding rate and sowing method, the density of plants is higher than on an unfertilized background. The number of seeds, seed weight and fiber weight per plant in the experimental variants studied by us decreased with an increase in the seed sowing rate. A similar pattern was obtained for the weight of 1000 seeds. The largest weight of seeds and fiber from one plant was obtained with a single-row sowing method with a seeding rate of 10 kg per ha, and the smallest — with a continuous sowing method with a seeding rate of 100 kg per ha. The highest seed yield on both fertilized and unfertilized backgrounds was obtained with a wide-row sowing method and a seeding rate of 10–15 kg/ha. The highest fiber yield on both backgrounds was obtained with a continuous sowing method with a seeding rate of 80–100 kg/ha.
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Claims 8
Claim · model-written summary
Seeding rate increased the density of the hemp stem stand for all sowing methods on unfertilized and fertilized backgrounds.
- Taxon
- hemp
Cannabis sativa subsp. sativae1 - Treatment
- seeding ratee2
- Outcome
- density of the stem stande2
- Direction
- increasese2
- Qualifier
- for all sowing methods, both on an unfertilized and fertilized backgrounde2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In connection with the widespread introduction of monoecious hemp varieties into the production”
e2“the density of the stem stand increases with an increase in the seeding rate for all sowing methods, both on an unfertilized and fertilized background”
Claim · model-written summary
On a fertilized background with the same seeding rate and sowing method, hemp plant density was higher than on an unfertilized background.
- Taxon
- hempCannabis sativa subsp. sativae1
- Treatment
- fertilized backgrounde3
- Outcome
- density of plantse3
- Direction
- highere3
- Qualifier
- same seeding rate and sowing methode3
- Comparator
- unfertilized backgrounde3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In connection with the widespread introduction of monoecious hemp varieties into the production”
e3“On a fertilized background with the same seeding rate and sowing method, the density of plants is higher than on an unfertilized background”
Claim · model-written summary
Increasing seed sowing rate decreased the number of seeds, seed weight and fiber weight per hemp plant.
- Taxon
- hempCannabis sativa subsp. sativae1
- Treatment
- seed sowing ratee4
- Outcome
- number of seeds, seed weight and fiber weight per plante4
- Direction
- decreasede4
- Qualifier
- in the experimental variants studied by use4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In connection with the widespread introduction of monoecious hemp varieties into the production”
e4“The number of seeds, seed weight and fiber weight per plant in the experimental variants studied by us decreased with an increase in the seed sowing rate”
Claim · model-written summary
Increasing seed sowing rate decreased the weight of 1000 hemp seeds, following a similar pattern.
- Taxon
- hempCannabis sativa subsp. sativae1
- Treatment
- seed sowing ratee4
- Outcome
- weight of 1000 seedse5
- Direction
- decreaseinferrede5
- Qualifier
- A similar patterne5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In connection with the widespread introduction of monoecious hemp varieties into the production”
e4“The number of seeds, seed weight and fiber weight per plant in the experimental variants studied by us decreased with an increase in the seed sowing rate”
e5“A similar pattern was obtained for the weight of 1000 seeds”
Claim · model-written summary
The largest weight of seeds and fiber from one hemp plant was obtained with a single-row sowing method at a seeding rate of 10 kg per ha.
- Taxon
- hempCannabis sativa subsp. sativae1
- Treatment
- single-row sowing method with a seeding rate of 10 kg per hae6
- Outcome
- weight of seeds and fiber from one plante6
- Direction
- largeste6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In connection with the widespread introduction of monoecious hemp varieties into the production”
e6“The largest weight of seeds and fiber from one plant was obtained with a single-row sowing method with a seeding rate of 10 kg per ha, and the smallest — with a continuous sowing method with a seeding rate of 100 kg per ha”
Claim · model-written summary
The smallest weight of seeds and fiber from one hemp plant was obtained with a continuous sowing method at a seeding rate of 100 kg per ha.
- Taxon
- hempCannabis sativa subsp. sativae1
- Treatment
- continuous sowing method with a seeding rate of 100 kg per hae6
- Outcome
- weight of seeds and fiber from one plante6
- Direction
- smalleste6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In connection with the widespread introduction of monoecious hemp varieties into the production”
e6“The largest weight of seeds and fiber from one plant was obtained with a single-row sowing method with a seeding rate of 10 kg per ha, and the smallest — with a continuous sowing method with a seeding rate of 100 kg per ha”
Claim · model-written summary
The highest hemp seed yield on fertilized and unfertilized backgrounds was obtained with a wide-row sowing method at a seeding rate of 10–15 kg/ha.
- Taxon
- hempCannabis sativa subsp. sativae1
- Treatment
- wide-row sowing method and a seeding rate of 10–15 kg/hae7
- Outcome
- seed yielde7
- Direction
- higheste7
- Qualifier
- on both fertilized and unfertilized backgroundse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In connection with the widespread introduction of monoecious hemp varieties into the production”
e7“The highest seed yield on both fertilized and unfertilized backgrounds was obtained with a wide-row sowing method and a seeding rate of 10–15 kg/ha”
Claim · model-written summary
The highest hemp fiber yield on both backgrounds was obtained with a continuous sowing method at a seeding rate of 80–100 kg/ha.
- Taxon
- hempCannabis sativa subsp. sativae1
- Treatment
- continuous sowing method with a seeding rate of 80–100 kg/hae0
- Outcome
- fiber yielde0
- Direction
- higheste0
- Qualifier
- on both backgroundse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In connection with the widespread introduction of monoecious hemp varieties into the production”
e0“The highest fiber yield on both backgrounds was obtained with a continuous sowing method with a seeding rate of 80–100 kg/ha”
The same questions in other papers
density · yield · Cannabis sativaPositive and negative results
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- no effect
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5 papers in the same direction as this paper · 6 in the opposite direction
- no effect
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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.