Seed Yield and Quality of Winter Oilseed Rape as Affected by Nitrogen Rates, Sowing Time, and Fungicide Application

2006 ◽  
Vol 37 (15-20) ◽  
pp. 2725-2744 ◽  
Author(s):  
Bronislava Butkutė ◽  
Gvidas Šidlauskas ◽  
Irena Brazauskienė
Keyword(s):  
Oilseed Rape ◽  
Seed Yield ◽  
Winter Oilseed Rape ◽  
Sowing Time ◽  
Fungicide Application ◽  
Yield And Quality ◽  
Nitrogen Rates

Assessment of Seed Yield and Quality of Winter Oilseed Rape Using Chlorophyll Fluorescence Parameters of Pods

2020 ◽  
Vol 63 (2) ◽  
pp. 231-242
Author(s):  
Haixia Xu ◽  
Haiyan Cen ◽  
Zhihong Ma ◽  
Liang Wan ◽  
Weijun Zhou ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Oilseed Rape ◽  
Seed Yield ◽  
Jip Test ◽  
N Application ◽  
Fluorescence Parameters ◽  
Crop Varieties ◽  
Yield And Quality ◽  
Agronomic Management

Abstract. Oilseed rape is one of the leading sources of vegetable oil in the world. Maximizing the seed yield and quality is crucial to improve the profit for farmers and meet the increasing consumer demand for healthy vegetable oil. However, the current evaluation process of seed yield and quality is tedious and inefficient due to its dependence on wet chemistry methods and/or manual measurements of small sample sizes. Because the photosynthesis of pods plays an important role in the accumulation of grain filling, this research aimed to evaluate the seed yield and quality of oilseed rape by using chlorophyll fluorescence (ChlF) parameters. The OJIP kinetics of rape pods were acquired in two independent experiments with different levels of nitrogen (N) application and different crop varieties, respectively. The JIP-test showed that the level of N fertilizer can influence the plant photosynthetic capacity and crop productivity, and the photosynthetic response also varied in the different varieties. The maximum quantum yield for primary photochemistry (Fv/Fm) was a sensitive indicator for evaluating the performance of photosystem II (PSII) activity with the different N applications and varieties. Increased quantum yield and efficiency with more active reaction centers (RCs) were observed under increased N application as well as with variety GY605, leading to higher energy utilization efficiencies. However, superior photosynthetic apparatus in pods is not recommended in high-quality seed breeding because it would increase the contents of glucosinolates and erucic acid. In addition, the random forest (RF) algorithm was proven to be effective in feature selection, and the selected fluorescence parameters mostly showed high correlations with seed yield and quality. These results demonstrate the potential of the ChlF method for assessing the seed yield and quality of oilseed rape at the early podding stage, which could also be useful for advancing crop breeding and improving agronomic management. Keywords: Agronomic management, Chlorophyll fluorescence, Crop varieties, JIP-test, Oilseed rape, Seed quality, Seed yield.

scholarly journals Do Soil Warming and Changes in Precipitation Patterns Affect Seed Yield and Seed Quality of Field-Grown Winter Oilseed Rape?

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 520
Author(s):  
Ireen Drebenstedt ◽  
Leonie Hart ◽  
Christian Poll ◽  
Sven Marhan ◽  
Ellen Kandeler ◽  
...  
Keyword(s):  
Soil Temperature ◽  
Oilseed Rape ◽  
Seed Yield ◽  
Seed Quality ◽  
Precipitation Amount ◽  
Winter Oilseed Rape ◽  
Soil Warming ◽  
Precipitation Patterns ◽  
Crop Development

Increasing air and soil temperatures and changes in precipitation patterns as consequences of climate change will affect crop production in agricultural ecosystems. The combined effects of soil warming and altered precipitation on the productivity and product quality of oil crops are not yet well studied. Winter oilseed rape (OSR) (Brassica napus L., cv. Mercedes) was field-grown under elevated soil temperature (+2.5 °C), reduced precipitation amount (−25%), reduced precipitation frequency (−50%) both separately and in combination in order to investigate effects on crop development, seed yield, and seed quality. Soil warming accelerated crop development during early plant growth and during spring. At maturity, however, plants in all treatments were similar in quantitative (aboveground biomass, seed yield) and qualitative (protein and oil content, amino acids, fatty acids) parameters. We observed the long-term effects of the precipitation manipulation on leaf size, leaf senescence and biomass allocation. Seed yield was not affected by the altered climatic factors, perhaps due to adaptation of soil microorganisms to permanent soil warming and to relatively wet conditions during the seed-filling period. Overall, OSR performed well under moderate changes in soil temperature and precipitation patterns; thus, we observed stable seed yield without negative impacts on nutritive seed quality.

Yield and quality of winter oilseed rape in response to different systems of foliar fertilization

2016 ◽  
Author(s):  
Krzysztof Jankowski ◽  
Piotr Żarczyński ◽  
Sławomir Krzebietke ◽  
Krzysztof Jankowski ◽  
Piotr Stanisław Hulanicki ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
Winter Oilseed Rape ◽  
Foliar Fertilization ◽  
Yield And Quality
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