Abstract
Planting density is an important factor affecting plant growth and yield formation in rapeseed. However, the understanding of the mechanism underlying the impact of planting density on biomass, canopy, and ultimate seed yield remains limited. A field experiment was conducted to investigate the effect of planting density on seed yield, yield components, biomass accumulation and partitioning, and canopy structure. Five planting density levels were set as D1 (2.4 × 105 plants ha−1), D2 (3.6 × 105 plants ha−1), D3 (5.4 × 105 plants ha−1), D4 (6.0 × 105 plants ha−1), and D5 (7.2 × 105 plants ha−1). The results showed that with planting density increasing from D1 to D3, the seed yield, number of pods in population, and 1000-seed weight increased, while seedling survival rate, yield per plant, number of pods per plant, and number of seeds per plant decreased. When planting density increased to D4 and D5, seed yield dramatically decreased due to a decreased number of seeds per pod and 1000-seed weight. Increasing planting density from D1 to D3 increased biomass accumulation in all organs. D3 produced the highest biomass partitioning in seeds. In addition, D2 and D3 treatments had a high level of pod area index (5.3–5.8), which caused an approximately 93% of the light to be intercepted. The distribution of light in D2 and D3 was more evenly spread, with the upper and lower parts of the canopy displaying a distribution ratio of roughly 7:3. Therefore, D2 and D3 produced the highest seed yields. In conclusion, D2 and D3 are recommended in rapeseed production due to their role in improving biomass accumulation and partitioning and canopy structure.
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Claims 11
Claim · model-written summary
Increasing planting density from D1 to D3 increased seed yield, pod number in population and 1000-seed weight.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e1“A field experiment was conducted to investigate the effect of planting density on seed yield”
e2“with planting density increasing from D1 to D3, the seed yield, number of pods in population, and 1000-seed weight increased”
Claim · model-written summary
Increasing planting density from D1 to D3 decreased seedling survival rate, yield per plant and pod number per plant.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e2“with planting density increasing from D1 to D3, the seed yield, number of pods in population, and 1000-seed weight increased”
e3“seedling survival rate, yield per plant, number of pods per plant, and number of seeds per plant decreased”
Claim · model-written summary
Increasing planting density from D1 to D3 decreased the number of seeds per plant.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e2“with planting density increasing from D1 to D3, the seed yield, number of pods in population, and 1000-seed weight increased”
e3“seedling survival rate, yield per plant, number of pods per plant, and number of seeds per plant decreased”
Claim · model-written summary
Planting density increased to D4 and D5 dramatically decreased seed yield through fewer seeds per pod and lower 1000-seed weight.
- Taxon
- rapeseede0
- Treatment
- planting density increased to D4 and D5e4
- Outcome
- seed yielde4
- Direction
- dramatically decreasede4
- Qualifier
- due to a decreased number of seeds per pod and 1000-seed weighte4
Not reportedComparator
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e4“When planting density increased to D4 and D5, seed yield dramatically decreased due to a decreased number of seeds per pod and 1000-seed weight”
Claim · model-written summary
D3 gave the highest biomass partitioning to seeds.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e5“D3 produced the highest biomass partitioning in seeds”
Claim · model-written summary
Increasing planting density from D1 to D3 increased biomass accumulation in all organs.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e6“Increasing planting density from D1 to D3 increased biomass accumulation in all organs”
Claim · model-written summary
D2 and D3 gave a high pod area index of 5.3-5.8.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e7“D2 and D3 treatments had a high level of pod area index”
e2“(5.3–5.8)”
Claim · model-written summary
D2 and D3 intercepted approximately 93% of the light.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e7“D2 and D3 treatments had a high level of pod area index”
e3“which caused an approximately 93% of the light to be intercepted”
Claim · model-written summary
Light distribution in D2 and D3 canopies was more evenly spread, with an upper-to-lower ratio of roughly 7:3.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e1“The distribution of light in D2 and D3 was more evenly spread”
e2“a distribution ratio of roughly 7:3”
Claim · model-written summary
D2 and D3 produced the highest seed yields.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e1“D2 and D3 produced the highest seed yields”
Claim · model-written summary
D2 and D3 are recommended for rapeseed production.
Verbatim
e0“Planting density is an important factor affecting plant growth and yield formation in rapeseed”
e1“D2 and D3 are recommended in rapeseed production”
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