Analysis of organic manure and nano-fertilizers impacts on sunflower (Helianthus annuus L.)

Meng Ren Ma, Stefan Demjanova Tyro

Abstract


Sunflower is third most important source of edible oil and accounts for about 14% of the world production of seed oils. Although the
Sunflower is well adapted to semi-arid regions, low soil fertility and nutrients deficiencies are important yield limiting factor for
sunflower production. Current experiment was carried out to study the effects of farmyard manure (zero (M1), 20 (M2) t ha?1) and nanostructured
fertilizers (Mn, Fe, Zn ) on agronomical traits, yield and yield components of oily sunflower (Helianthus annuus L.).
Experiment was conducted during 2015-2016 growing seasons at a research field in Maragheh, northwest of Iran. Farmyard application
significantly improved the agronomic traits such as plant height, leaf area, number of leaves, internode length, stem diameter, diameter of
branch head, number of branches, length of branches, achene length, and achene width, main capitulum diameter 100- achene weight, oil
content in achene over the control. Result revealed that plants grown under M2 began the showed an earlier flowering and possessed the
higher chlorophyll concentration in leaves. Moreover, application of nano-chelated Zn and Fe considerably decreased the proportion of
empty achenes and increased oil concentration, achene yield and harvest index. However the best performance was obtained by
combined application of nano-chelated Zn under manured condition. The findings pointed out that the importance micronutrientdeficiencies
and balanced nutrition in this area. Overall, the results show that the integrated application of organic manure and nanochelated
micronutrients is more effective to improve yield of sunflower in semiarid production systems.


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