Rapeseed in China

Bonjean, Alain P.; Dequidt, Céline; Sang, Tina T.

doi:10.1051/ocl/2016045

Cited by 23 publications

(13 citation statements)

References 1 publication

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“…Rapeseed ( Brassica napus L.) is the most extensively cultivated oil crop and the fourth main crop in China after rice, wheat, and maize 1 . China is the second largest rapeseed producer after Canada, accounting for almost one-fourth of the world’s total production and planting area 2 ; with total area of cultivation reaching 7.59 million hectares in 2015 3 . Yangtze River Basin is largest rapeseed producing belt in China where an intensive crop production system is commonly used by farmers to obtain high yields 4 .…”

Section: Introductionmentioning

confidence: 99%

Alteration in yield and oil quality traits of winter rapeseed by lodging at different planting density and nitrogen rates

Khan

Anwar

Kuai

et al. 2018

Sci Rep

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Lodging is a factor that negatively affects yield, seed quality, and harvest ability in winter rapeseed (Brassica napus L.). In this study, we quantified the lodging-induced yield losses, changes in fatty acid composition, and oil quality in rapeseed under different nitrogen application rates and planting densities. Field experiments were conducted in 2014–2017 for studying the effect of manually-induced lodging angles (0°, 30°, 60°, and 90°), 10, 20 and 30 d post-flowering at different densities and nitrogen application rates. The fertilization/planting density combination N270D45 produced the maximum observed yield and seed quality. Timing and angle of lodging had significant effects on yield. Lodging at 90° induced at 10 d post-flowering caused the maximum reduction in yield, biomass, and silique photosynthesis. Seed yield losses were higher at high N application rates, the maximum being at N360D45. Lodging decreased seed oil content and altered its fatty acid composition by increasing stearic and palmitic acid content, while decreasing linoleic and linolenic acid content, and deteriorating oil quality by increasing erucic acid and glucosinolate content. Therefore, lodging-induced yield loss and reduction in oil content might be reduced by selecting optimum N level and planting density.

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Section: Introductionmentioning

confidence: 99%

Alteration in yield and oil quality traits of winter rapeseed by lodging at different planting density and nitrogen rates

Khan

Anwar

Kuai

et al. 2018

Sci Rep

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“…Rapeseed is the most widely planted oil crop and rapeseed oil serves as one of the main vegetable oil (Bonjean et al., 2016). As the largest oilseed rapeseed producer in terms of planting area and seed yield, with which accounting for 23% of the global level (FAO, 2020), China still needs to import millions of tonnes rapeseeds in relieving a shortfall in the supply of domestic edible vegetable oil in recent years.…”

Section: Introductionmentioning

confidence: 99%

The physiological and proteomic characteristics of oilseed rape stem affect seed yield and lodging resistance under different planting densities and row spacing

Kuai

et al. 2021

J Agronomy Crop Science

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Lodging is an important factor that restricts the yield of rapeseed and the mechanical harvesting. To explore agricultural practise and mechanisms that can synergistically improve the rapeseed yield and lodging resistance, a conventional plant type HZ 62 was selected in 2016–2017, and HZ 62 and an erect‐leaf type 1,301 were grown in 2017–2018. The planting density was set as main plots at 15 × 104 plants ha1 (D1), 30 × 104 plants ha‐1 (D2) and 45 × 104 plants ha−1 (D3), with the row spacing as sub‐plots of 15 cm (R15), 25 cm (R25) and 35 cm (R35). The results showed that with increased density and narrowed row spacing, the radiation utilisation efficiency (RUE) of the population and seed yield were greatly increased. Compared with that at D1R25, the yield of HZ 62 at D3R15 was increased by 19.00% and 22.53%, respectively, in 2016–2017 and 2017–2018, whereas the yield of 1,301 rose by 31.98%. The influence of the RUE on the seed yield reached the peak at flowering stage. With increased planting density and narrowed row spacing, the lodging index of HZ 62 declined. The lodging index of 1,301 was increased with higher density and declined with narrowed row spacing. Compared with D1R25, the averaged lodging index across different parts of HZ 62 at D3R15 declined by 15.03% and 10.80%, respectively, in 2016–2017 and 2017–2018, and that of 1,301 was increased by 25.47%. Compared with D1R25, the stem proteomics during the flowering stage showed the expression of photosynthesis‐related proteins (A0A078FHG9, A0A078JZM9 and A0A078JQI2) up‐regulated, that consistent with Rubisco, SPS and FBPase activities; proteins related to phenylpropanes metabolism, A0A078IWR4 of HZ 62 and A0A078JWZ9 of 1,301 increased that consistent with POD activity, which resulted in more sucrose, starch and lignin in the stem at D3R15. Moreover, the protein related to cellulose synthesis (A0A078I4D9), the activity of β‐1,3‐glucanase and content of cellulose in the stem were up‐regulated in HZ 62 but down‐regulated in 1,301, contrary to the variation in the stem lodging index. The cellulose synthesis differed between the varieties in different treatment combinations of planting density and row spacing. This was the key process by which planting density and row spacing influence the lodging of rapeseed varieties with varied plant architecture.

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“…Rapeseed (Brassica napus L) is one of the major oilseed crops consumed widely globally as its oil production per hectare is double compared to soybean (Shahidi, 1990). China is the second-largest producer of rapeseed after Canada (Bonjean et al, 2016). Rapeseed is the fourth largest cultivated crop in China after rice, maize and wheat, with 'The Yangtze River Basin' being the largest rapeseed producing belt where farmers use an intensive crop production system to obtain higher yields (X.…”

Section: Introductionmentioning

confidence: 99%

Carbohydrates accumulation, oil quality and yield of rapeseed genotypes at different nitrogen rates

Ghafoor

Karim

Asghar

et al. 2021

Plant Production Science

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A field experiment was conducted in 2018-2020 to investigate the effect of two nitrogen application rates (N 0 = 0 kg ha −1 (control), N 90 = 90 kg ha −1 , and N 180 = 180 kg ha −1 ) on morphological and physiological behaviours of two new rapeseed varieties; V 1 = JYJS01 (semi-dwarf variety) and V 2 = CY36 (tall variety). Our results indicated that N application enhanced the plant growth and seed protein content in comparison to control. Contrastingly, compared with control, sugar contents, i.e. sucrose and reducing sugars, decreased significantly in response to an increase in N. Seed oil content also decreased by 8.5% and 5.5%, 6.7% and 3.9% against N 180 in V 1 and V 2 during 2019 and 2020, respectively. Furthermore, higher nitrogen application rates decreased seed fatty acid proportions by decreasing the sugar availability for fatty acid biosynthesis. Our results demonstrated the highest seed yield (9.4 g plant −1 in 2018/19 and 9.5 g plant −1 in 2019/20) in V 2 against N 180 , and the lowest seed yield (3.2 g plant −1 in 2018/19 and 3.4 g plant −1 in 2019/20) in V 1 at control. These findings imply that a high nitrogen application rate had increased the yield. At the same time, the carbohydrates translocation from stems to seed for fatty acid biosynthesis decreased, which played their significant role in seed physiology for fatty acid metabolisms, ultimately affected the seed quality. However, there is still a dire need to evaluate how nitrogen application affect the carbohydrate availability for fatty acid metabolism in the seed of new winter rapeseed varieties.

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Rapeseed in China

Cited by 23 publications

References 1 publication

Alteration in yield and oil quality traits of winter rapeseed by lodging at different planting density and nitrogen rates

Alteration in yield and oil quality traits of winter rapeseed by lodging at different planting density and nitrogen rates

The physiological and proteomic characteristics of oilseed rape stem affect seed yield and lodging resistance under different planting densities and row spacing

Carbohydrates accumulation, oil quality and yield of rapeseed genotypes at different nitrogen rates

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