Effect of Potassium and Sulphur Fertilizers on Yield, Yield Components and Seed Quality of Spring Canola (Brassica napus L.) Seed

Govahi, Mostafa; Saffari, Mehri

doi:10.3923/ja.2006.577.582

Cited by 15 publications

(4 citation statements)

References 15 publications

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“…Therefore, balanced fertilization is essential for increasing the yield. Giovahi and Saffari [19] indicated K and S interaction in dry matter production. Brenan and Bolland [15,27] proved that for obtaining high yields of rapeseed at a growing level of fertilization with N, it is necessary to increase P and K rates.…”

Section: Discussionmentioning

confidence: 98%

“…Wang et al [21] report that the accumulation of nutrients in the plant changes depending on their concentration in plant and dry matter production, whereas the dry matter production is fundamentally important. Reduction in the rates of elements limits biomass production [14,19,21], as well as the element concentration [16,21], and thus, the degree of their accumulation [21]. According to Brennan and Bolland [26], the response of rapeseed to P and K fertilization also depends on the content of these elements in the soil.…”

Section: Discussionmentioning

confidence: 99%

“…Potassium is taken up by rapeseed in the largest amounts [17,18]. Insufficient availability of this nutrient strongly limits the growth and yield of rapeseed [19,20]. According to Szczepaniak [18], the number of seeds in pods, as a prerequisite of the final yield, depends on the K management pattern in rapeseed 2 of 11 canopy before and after the flowering stage.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers indicate the mutual relationship of nutrients (N, P, K and others) in affecting their accumulation, aboveground and belowground biomass production and seed yield of rapeseed [18,19,26,27]. Deficiency of any nutrient limits the growth and crop yield [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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P and K Accumulation by Rapeseed as Affected by Biostimulant under Different NPK and S Fertilization Doses

Szczepanek

Siwik-Ziomek

2019

Agronomy

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Biostimulants are gaining growing importance among preparations used for plant production. They may cause increasing the effectiveness of nutrient uptake. The aim of the study was to assess P and K accumulation by winter rapeseed after the application of a biostimulant under conditions of varied NPK and S fertilization levels. The field experiment was established on Alfisol, and the factors were: Two levels of NPK fertilization (high 180 N, 70 P, 132 K (kg ha−1) or low 144 N, 35 P, 66 K (kg ha−1)); elementary S fertilization (36 or 0 kg ha−1) and application of seaweed biostimulant or without that treatment. Biostimulant caused an increase in P and K accumulation in the shoots of rapeseed during generative development. Application of biostimulant in rapeseed fertilized with lower NPK rates or not fertilized with S increased P and K accumulation in shoots to the level obtained at higher NPK and S rates without that treatment. Increased level of NPK fertilization caused an increase in P and K accumulation in both shoots and roots at flowering and ripening stages. At the fruit development stage, under higher NPK fertilization there was higher uptake of P and K in rapeseed shoots after presowing fertilization with S.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

P and K Accumulation by Rapeseed as Affected by Biostimulant under Different NPK and S Fertilization Doses

Szczepanek

Siwik-Ziomek

2019

Agronomy

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Potassium‐fertilizer management in winter oilseed‐rape production in China

Ren

Lü

et al. 2013

Z. Pflanzenernähr. Bodenk.

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Optimal potassium (K) fertilization is beneficial for oilseed-rape (Brassica napus L.) yield and quality. However, the discrepancy between the high K demand of winter oilseed rape and low soil fertility and insufficient potassium input has limited the sustainable development of oilseedrape production. A series of on-farm experiments in the key winter oilseed-rape domains of China was conducted from 2004 to 2010 to evaluate K-fertilizer management for winter oilseed rape. Currently, the average NH 4 OAc-extractable K content in the 0-20 cm soil layer is 89.1 mg kg -1 indicative of "slight deficiency". In addition, farmers in China usually fail to use sufficient K fertilizer in oilseed-rape production, the average mineral-potassium-fertilizer input in 2010 being only 35 kg K ha -1 , far lower than the recommended rate of potassium for winter oilseed rape. Adequate potassium fertilization significantly raises seed yield. The average yieldincrease rate for the major production regions due to K-fertilizer application was 18.5%, and the average K fertilizer-use efficiency 36.1%. Based on the negative correlation between yield response to potassium fertilization and available soil K content, a soil-K-test index was established for winter oilseed rape with a threshold value for NH 4 OAc-extractable soil K of 135 mg kg -1 . When available soil K-content is below this threshold value, more K fertilizer should be applied to achieve high seed yield and to increase soil fertility. The major challenge for K-fertilizer management in winter oilseed-rape production in China will be to guide farmers in the different regions in making reasonable use of K fertilizer through soil K-testing technology in order to maintain both seed yield and soil fertility.

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Camelina: Yield and quality response to nitrogen and sulfur fertilization in Poland

Jankowski

Sokólski

Kordan

2019

Industrial Crops and Products

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Effect of Potassium and Sulphur Fertilizers on Yield, Yield Components and Seed Quality of Spring Canola (Brassica napus L.) Seed

Cited by 15 publications

References 15 publications

P and K Accumulation by Rapeseed as Affected by Biostimulant under Different NPK and S Fertilization Doses

P and K Accumulation by Rapeseed as Affected by Biostimulant under Different NPK and S Fertilization Doses

Potassium‐fertilizer management in winter oilseed‐rape production in China

Camelina: Yield and quality response to nitrogen and sulfur fertilization in Poland

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