Effects of weather conditions during different growth phases on yield formation of winter oilseed rape

Abstract Winter oilseed rape is strongly responsive to changes in the plant density. Any change in plant density significantly affects the morphological characteristics and yield of the crop. In addition, plant growth habit can be modified by the use of plant growth regulators. Apart from plant growth regulators like eg. chlorocholine chloride some triazoles have dual properties (fungicide and plant growth regulator) eg. tebuconazole. The trials were carried out in the years 2006-2008 at the Institute of Plant Protection - National Research Institute in Poznan (Poland). The treatments consisted of chlorocholine chloride, tebuconazole and flusilazole applied in spring at the growth stage BBCH 30 and BBCH 50 of winter oilseed rape. The field trials were conducted with two sowing densities of winter oilseed rape: 60 seeds/ m2 and 120 seeds/m2. The vegetation seasons varied according to the weather conditions, and the second testing year was characterised by drought in May and June. In the experiments plant height, SPAD units, number of siliques per plant, seed number per silique, weight of thousand seeds, yield, protein and fat content in the seeds were estimated. The increase of silique numbers per plant appeared only at the lower sowing density as a result of the application of tebuconazole or a mixture of tebuconazole with CCC. Flusilazole had a positive impact on seed number per silique. At both sowing densities, changes in the weight of a thousand seeds under the influence of the test preparations, were observed only in that year which had wet weather conditions. A more favourable effect of the test substances on the weight of a thousand seeds was obtained at the lower sowing density. All the tested substances positively affected SPAD unit values at the lower sowing density. At the higher sowing density, SPAD unit values increased after the application of flusilazole, and after a mixture of CCC + tebuconazole. The tested substances had a positive impact on plant yield but they did not affect the protein and fat content in oilseed rape seeds.

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Nutrient deficiency limits population development, yield formation, and nutrient uptake of direct sown winter oilseed rape

Journal of Integrative Agriculture ◽

10.1016/s2095-3119(14)60798-x ◽

2015 ◽

Vol 14 (4) ◽

pp. 670-680 ◽

Cited By ~ 14

Author(s):

Yin WANG ◽

Tao LIU ◽

Xiao-kun LI ◽

Tao REN ◽

Ri-huan CONG ◽

...

Keyword(s):

Nutrient Uptake ◽

Oilseed Rape ◽

Nutrient Deficiency ◽

Population Development ◽

Winter Oilseed Rape ◽

Yield Formation

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The Reaction of Winter Oilseed Rape to Different Foliar Fertilization with Macro- and Micronutrients

Agriculture ◽

10.3390/agriculture11060515 ◽

2021 ◽

Vol 11 (6) ◽

pp. 515

Author(s):

Wacław Jarecki

Keyword(s):

Oilseed Rape ◽

Economic Effect ◽

Weather Conditions ◽

Cultivated Plants ◽

Agricultural Practice ◽

Winter Oilseed Rape ◽

Brassica Napus L ◽

Area Index ◽

Plant Seed ◽

Foliar Fertilization

Foliar fertilization provides cultivated plants with the necessary nutrients during the growing season. The conducted field experiment was aimed at comparing the effectiveness of different variants of foliar fertilization applied in the cultivation of winter oilseed rape (Brassica napus L.), cultivar ‘ES Cesario’. The experimental factors were: A (control), B (YaraVita Brassitrel Pro), C (YaraVita Brassitrel Pro and YaraVita Thiotrac), D (YaraVita Brassitrel Pro and YaraVita Bortrac), E (YaraVita Brassitrel Pro and YaraVita Bortrac and YaraVita Thiotrac) and F (YaraVita Thiotrac). Weather conditions were variable over the years of the study and had a modifying effect on most of the tested parameters. Intensive foliar fertilization (variants D and E) resulted in a significant increase in the number of pods per plant, seed and fat yields, and SPAD (soil plant analysis development) and LAI (leaf area index) indices compared to the control. The protein yield was the highest after fertilizer applications in variants C and E. The use of YaraVita Thiotrac alone (variant F) did not provide the expected results. Foliar fertilizers applied in variant D increased Gs (leaf stomatal conductance) measurements and fat content in seeds but decreased TSW and seed protein content. It was shown that intensive foliar fertilization (variants D and E) increased seed boron content compared to YaraVita Thiotrac fertilization and the control. Fat and protein yields were strongly positively correlated with seed yield (r = 0.93 and r = 0.71, respectively). The best economic effect was obtained after applying foliar fertilization in variants D and E; therefore, they can be recommended for agricultural practice.

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The Effect of Meat and Bone Meal (MBM) on the Seed Yield and Quality of Winter Oilseed Rape

Agronomy ◽

10.3390/agronomy10121952 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1952

Author(s):

Aleksandra Załuszniewska ◽

Anna Nogalska

Keyword(s):

Fatty Acids ◽

Oilseed Rape ◽

Seed Yield ◽

Weather Conditions ◽

Meat And Bone Meal ◽

Bone Meal ◽

Winter Oilseed Rape ◽

Ne Poland ◽

Adverse Weather ◽

Total Fatty Acids

The aim of a two-year field experiment conducted in north-eastern (NE) Poland was to evaluate the effect of meat and bone meal (MBM) applied without or with mineral nitrogen (N) on seed yield, thousand seed weight (TSW), protein yield, fat yield, fatty acid profile and glucosinolate (GLS) concentrations in winter oilseed rape. Five treatments were compared: MBM applied at 1.0, 1.5, 2.0 Mg ha−1, inorganic NPK, and a zero-N check. The first two MBM plots and the NPK plots received supplemental inorganic N to provide a total of 158 kg N ha−1. The yields of winter oilseed rape were highest in the treatment with mineral (NPK) fertilization. All plots receiving MBM yielded equally to each other but greater than the unfertilized check. Winter oilseed rape accumulated significantly more protein in seeds in the NPK treatment than in the 1.5 Mg ha−1 MBM + 40 kg N ha−1 treatment. The crude fat content of seeds was significantly higher in the 1.5 Mg MBM ha−1 + 40 kg N ha−1 treatment, compared with the NPK treatment and the 1.0 Mg MBM ha−1 + 79 kg N ha−1 treatment. Oleic, linoleic, and α-linolenic acids accounted for nearly 90% of total fatty acids in rapeseed oil, and the average ratio of linoleic acid to α-linolenic acid was 1.81:1. Fertilization had a minor influence on the proportions of fatty acids, which were considerably affected by adverse weather conditions.

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Impact of winter oilseed rape nutritional status during vegetative growth on yield

Plant Soil and Environment ◽

10.17221/512/2019-pse ◽

2019 ◽

Vol 65 (No. 10) ◽

pp. 490-496

Author(s):

Katarzyna Przygocka-Cyna ◽

Witold Grzebisz ◽

Witold Szczepaniak ◽

Agnieszka Zawieja

Keyword(s):

Nutritional Status ◽

Oilseed Rape ◽

Late Stage ◽

Field Experiments ◽

Weather Conditions ◽

Fertility Level ◽

Winter Oilseed Rape ◽

Inflorescence Development ◽

Vegetative Period ◽

Limiting Nutrient

The nutritional status of winter oilseed rape (WOSR) during its vegetative period is crucial for plant growth and can be used for the seed yield prediction. This hypothesis was verified based on the data from long-term field experiments. The experiment consisted of four potassium (K) treatments based on the progressive K supply potential to plants from soil and fertilizer and two magnesium treatments (–Mg, +Mg) conducted in 2013–2015. The content of nutrients (N<sub>tot</sub>, P, K, Mg, Ca, Fe, Mn, Zn, Cu) was determined at the rosette stage (BBCH 30) for leaves and separately for leaves and stems in the late stage of inflorescence growth (BBCH 57–59). The low K content appeared as the key limiting nutrient in WOSR plants in the rosette stage due to the insufficient soil fertility level, depended even more on weather conditions. This negative K nutritional trait persisted through the whole vegetative WOSR growth. Its detection was possible, because stems were included in the diagnostic procedure. The most reliable prognosis of WOSR yield was conducted based on the nutritional status of stems in the late stage of the inflorescence development.

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Effect of autumn nitrogen fertilization on winter oilseed rape growth and yield parameters

Plant Soil and Environment ◽

10.17221/444/2019-pse ◽

2019 ◽

Vol 65 (No. 9) ◽

pp. 435-441 ◽

Cited By ~ 2

Author(s):

Juraj Beres ◽

David Becka ◽

Jaroslav Tomasek ◽

Jan Vasak

Keyword(s):

Oilseed Rape ◽

Seed Yield ◽

Weather Conditions ◽

Growth And Yield ◽

Above Ground Biomass ◽

Winter Oilseed Rape ◽

Yield Parameters ◽

Fertilization Effects ◽

The Given ◽

Autumn Fertilization

Autumn fertilization of winter oilseed rape with nitrogen was monitored in exactly delimited small field experiment in the period of 2013/14–2015/16. The cultivar used was DK Exstorm, sowing amount: 50 seeds/m<sup>2</sup> and fertilizer applied in autumn was Ureastabil – granulated urea with urease inhibitor (NBPT). The application period was at the end of October, doses 40 and 80 kg N/ha. Research results confirmed a statistically important effect of autumn fertilization on growth of the above-ground biomass and roots. Statistically important effect on seed yield was confirmed, too. The dose of 40 kg N/ha resulted in the highest seed yield, on average by 10.6% higher than reference (5.7–6.5 t/ha). On the other hand, the dose of 80 kg N/ha increased the seed yield only by 7.4% on average (5.4–6.3 t/ha).Fertilization effects on the oil content and one thousand seeds’ weight were statistically insignificant. The results show that considering the given local and weather conditions and low mineral nitrogen content in the soil, the most suitable nitrogen dose for autumn fertilization is 40 kg N/ha. This dose follows the nitrate directive rules, supports oilseed rape strengthening before winter and intensifies it for better seed yield.

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Anti-nutritional substances (GSL) in winter oilseed rape depending on the biostimulators used

Acta Agriculturae Scandinavica Section B - Soil & Plant Science ◽

10.1080/09064710.2021.1921251 ◽

2021 ◽

pp. 1-6

Author(s):

Anna Sikorska ◽

Marek Gugała ◽

Krystyna Zarzecka

Keyword(s):

Oilseed Rape ◽

Winter Oilseed Rape

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A novel deletion in FLOWERING LOCUS T modulates flowering time in winter oilseed rape

Theoretical and Applied Genetics ◽

10.1007/s00122-021-03768-4 ◽

2021 ◽

Author(s):

Paul Vollrath ◽

Harmeet S. Chawla ◽

Sarah V. Schiessl ◽

Iulian Gabur ◽

HueyTyng Lee ◽

...

Keyword(s):

Association Mapping ◽

Flowering Time ◽

Oilseed Rape ◽

Major Effect ◽

Structural Variants ◽

Winter Oilseed Rape ◽

Flowering Locus T ◽

Winter Type ◽

Long Read ◽

Flowering Locus

Abstract Key message A novel structural variant was discovered in the FLOWERING LOCUS T orthologue BnaFT.A02 by long-read sequencing. Nested association mapping in an elite winter oilseed rape population revealed that this 288 bp deletion associates with early flowering, putatively by modification of binding-sites for important flowering regulation genes. Abstract Perfect timing of flowering is crucial for optimal pollination and high seed yield. Extensive previous studies of flowering behavior in Brassica napus (canola, rapeseed) identified mutations in key flowering regulators which differentiate winter, semi-winter and spring ecotypes. However, because these are generally fixed in locally adapted genotypes, they have only limited relevance for fine adjustment of flowering time in elite cultivar gene pools. In crosses between ecotypes, the ecotype-specific major-effect mutations mask minor-effect loci of interest for breeding. Here, we investigated flowering time in a multiparental mapping population derived from seven elite winter oilseed rape cultivars which are fixed for major-effect mutations separating winter-type rapeseed from other ecotypes. Association mapping revealed eight genomic regions on chromosomes A02, C02 and C03 associating with fine modulation of flowering time. Long-read genomic resequencing of the seven parental lines identified seven structural variants coinciding with candidate genes for flowering time within chromosome regions associated with flowering time. Segregation patterns for these variants in the elite multiparental population and a diversity set of winter types using locus-specific assays revealed significant associations with flowering time for three deletions on chromosome A02. One of these was a previously undescribed 288 bp deletion within the second intron of FLOWERING LOCUS T on chromosome A02, emphasizing the advantage of long-read sequencing for detection of structural variants in this size range. Detailed analysis revealed the impact of this specific deletion on flowering-time modulation under extreme environments and varying day lengths in elite, winter-type oilseed rape.

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