Effects of a range of phosphorus levels on yield, phosphorus efficiency, and canopy sunlight interception in direct‐seeded winter rapeseed

Wang, Rui; Zheng, Weidong; Wu, Yanhua; Liu, D.; Peng, Wenli

doi:10.1002/agj2.21394

Cited by 4 publications

References 29 publications

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Promoting rapeseed yield: Improving canopy structure and formation of large pod via adjusting planting density

Wang,

Li,

Qian

et al. 2024

Crop Science

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Increasing planting density is a common practice to enhance rapeseed (Brassica napus L.) yield via an increase in pod quantity. However, excessive density may lead to a deterioration in pod quality. Therefore, we hypothesized that improving pod quality based on a certain level of pod quantity could further increase seed yield. A randomized block experiment was conducted with five density levels (2.4, 3.6, 4.8, 6.0, and 7.2 × 105 plants ha−1, referred to as D1, D2, D3, D4, and D5) using two hybrid varieties of Qinyou10 and Ningza1838. The plot seed yield reached the maximum value in D2 or D3, and there was no significant difference between these two density levels. An increase in planting density resulted in a decrease in canopy thickness, but an increase in lodging angle and pod density. According to the number of seeds per pod, the pods were categorized into low‐productive pod (≤14), middle‐productive pod (15‒17), and high‐productive pod (≥18). The number of high‐productive pod in D2 and D3 ranged from 48.15 × 106 to 54.22 × 106 ha−1, accounting for 53.76%‒63.28% of the total pod number and 76.89%‒82.83% of the total seed yield. With the planting density increasing from D3 to D5, there was a significant transition from high‐productive pod to middle‐productive and low‐productive pods, causing a decrease in seed yield. Therefore, when the seed yield was targeted as 4500 kg ha−1, the suitable planting density ranged from 3.6 × 105 to 4.8 × 105 plants ha−1, and the optimal number of pods in population ranged from 83.0 × 106 to 94.0 × 106 ha−1, and the quantity proportion of high‐productive pod maintained >50%. This study provides a guide for high‐yield cultivation of rapeseed in China and presents a novel approach to promoting a potential yield of rapeseed.

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Promoting rapeseed yield: Improving canopy structure and formation of large pod via adjusting planting density

Wang,

Li,

Qian

et al. 2024

Crop Science

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Yield, boron uptake and canopy sunlight interception of direct-sown winter rapeseed as affected by boron fertilizer levels in China

Wang,

Peng,

Teng

2024

Preprint

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Boron is a very important micro-element for winter rapeseed, boron deficiency resulted in “flowering without seed setting” for winter rapeseed. Attention should been paid to the effects of boron application levels on yield and its utilization mechanism in main rapeseed production areas of southwestern China. A split-plot field experiment was conducted with five boron application levels (0, 3.75, 7.5, 15, and 30 kg boron ha− 1) and two rapeseed cultivars (Huayouza 9 and Zhongshuang 11). When boron was applied comparing with non-boron supply, seed yield of winter rapeseed increased 17.2–38.5% in 2020-21 and 6.2–38.1% in 2021-22, respectively. The boron uptake in the seed initially increased significantly and then nearly kept steadily, but the accumulation of boron continued to increase in the pericarp and stem with the increase of boron application levels from 0 to 30 kg ha− 1. Boron application level of 7.5–15 kg ha− 1 is important to increase the current direct-sown winter rapeseed yields in field soils with low available boron in Southwest China cropping areas. Seed yield was more significantly affected by boron input than crop canopy sunlight interception for direct-sown winter rapeseed in this region. These results indicated that it is an effective way to maintain soil fertility by returning no-seed rapeseed plant tissues to replenish soil boron in Southwest China and other boron-deficient planting area.

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Optimal Planting Density Increases the Seed Yield by Improving Biomass Accumulation and Regulating the Canopy Structure in Rapeseed

Lin,

Wang,

et al. 2024

Plants

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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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Effects of a range of phosphorus levels on yield, phosphorus efficiency, and canopy sunlight interception in direct‐seeded winter rapeseed

Cited by 4 publications

References 29 publications

Promoting rapeseed yield: Improving canopy structure and formation of large pod via adjusting planting density

Promoting rapeseed yield: Improving canopy structure and formation of large pod via adjusting planting density

Yield, boron uptake and canopy sunlight interception of direct-sown winter rapeseed as affected by boron fertilizer levels in China

Optimal Planting Density Increases the Seed Yield by Improving Biomass Accumulation and Regulating the Canopy Structure in Rapeseed

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