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 Influence of Organic and Inorganic Fertilizers on Coriander (Coriandrum sativum L.) Agronomic Traits, Essential Oil and Components under Semi-Arid Climate

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1427
Author(s):  
Gulen Ozyazici
Keyword(s):  
Essential Oil ◽  
Seed Yield ◽  
Harvest Index ◽  
Agronomic Traits ◽  
Climatic Conditions ◽  
Coriandrum Sativum ◽  
Inorganic Fertilizers ◽  
Yield And Quality ◽  
Biological Yield

Environmental contamination and the excessive use of inorganic fertilizers resulting in stagnant yields of field crops which necessitate the utilization of combined fertilization approach under changing climatic conditions. Current study was aimed to clarify the influence of several fertilizer sources (chemical, organic, organomineral fertilizers) on yield and quality of coriander (Coriandrum sativum L.). The results revealed that the fertilizer sources significantly affected the yield of coriander cultivars. The absence of “Year x Variety x Fertilizer Type” interactions for any of the noted parameters signaled that the detected “Variety x Fertilizer Type” interactions were constant regardless of the year factor. The recorded values of traits according to fertilizer sources different for the plant height from 61.85 to 69.67 cm, number of branches from 5.98 to 7.71 (piece/plant), number of umbels per the main umbel from 5.62 to 7.18 pieces, seed yield from 1.06 to 1.66 t/ha, the biological yield from 4.29 to 5.70 t ha−1, harvest index from 25.29 to 29.41%, essential oil ratio from 0.29 to 0.33%, and essential oil yield from 3.1 to 5.6 L ha−1. Erbaa variety was observed to be superior over the rest of the varieties producing the maximum values of 6.5 L ha−1 of essential oil, 0.36% essential oil content, 30.9% harvest index, 1.81 t/ha seed yield, and 5.9 t ha−1 biological yield with the treatment of chemical fertilizers.

scholarly journals Plant spacing and pollen quantity on yield and quality of squash seeds

2003 ◽  
Vol 21 (3) ◽  
pp. 443-447 ◽  
Author(s):  
Márcio S. de Lima ◽  
Antonio I. I. Cardoso ◽  
Marcelo F. Verdial
Keyword(s):  
Seed Yield ◽  
Seed Quality ◽  
Block Design ◽  
Fruit Production ◽  
Plant Spacing ◽  
Plant Seed ◽  
Yield And Quality ◽  
Randomized Complete Block Design ◽  
Pollen Quantity

Squash seeds yield and quality can be improved by proper population plant spacing and the pollen quantity, which influences the pollination quality and fertilization. Nine experiments were conducted as a factorial combination of three spacing between plants (0.8 x 0.3, 0.8 x 0.6 and 0.8 x 0.9 m), two quantities of pollen (50% of an anther and another entire one) and natural insect pollination. Seed and fruit production parameters, and seed quality were evaluated. A randomized complete block design, five replications, with ten plants per plot was adopted. Larger plant spacing increased the average number of mature fruits and seed yield per plant. Seed yield was directly proportional to the amount of pollen used during pollination. Higher amounts of pollen resulted in higher seed yield per area, but the plant spacing did not affect this characteristic. Manual pollination, using a whole anther, did not differ from natural pollination in relation to seed yield and quality.

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