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Research Detail

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NI. S. Jahan
'Professor
Agrotechnology Discipline, Khulna University, Khulna

*B. C. Sarker
Assistant Professor
Agrotechnology Discipline, Khulna University, Khulna

T. J. Mondal
Ex-student
Agrotechnology Discipline, Khulna University, Khulna

A field experiment was conducted at the experimental field of Agrotechnology Discipline, Khulna University to examine the impact of applied nutrients on agronomic characters of sunflower. The study was conducted by a factorial randomized complete block design (RCBD) with three replications. Two varieties (Factor A) namely Local variety and Kirani and six fertilizer treatments (Factor B) T,: N 0 kg ha', P 0 kg hi', K 0 kg hi', Zn 0 kg S 0 kg II' ; T2: N 140 kg hi', P 140 kg hi', K 140 kg hi', Zn 40 kg hi', S 6 kg hi', T3 :N 120 kg hi', P 120 kg hi', K 120 kg hi', Zn 35 kg hi', S 5 kg hi'; "F4 : N 100 kg hi', P 100 kg hi', K 100 kg hi', Zn 30 kg hi', S 4 kg hi% T5 : N 80 kg hi', P 80 kg hi', K 80 kg hi', Zn 25 kg hi', S 3 kg hi'; T6 :N 80 kg hi', P 80 kg hi', K 40 kg hi', Zn 20 kg hi', S 2 kg hi I were used in the experiment. Data on yield and different yield contributing characters were collected. Fertilizer treatments showed significant effect on yield and yield contributing characters of sunflower. However, varietal effect was non-significant in all cases except plant height and effect of interaction of fertilizer and variety was significant in case of head diameter, number of filled seeds head-1 and seed yield but non-significant effect was observed in all other cases. Except plant height, stover yield and harvest index; all other yield parameters were found maximum in the treatment T3 (N 120, P 120, K 120, Zn 35, S 5 kg hil). As expected, the control treatment (where no fertilizer was applied) possessed the worst performance for all the characters studied except plant height and harvest index. Numerically Kirani (V7) showed higher performance than local variety (V,) in most cases. Variable effects of variety x fertilizer combinations were observed in the study. Seed yield of sunflower was well correlated to head diameter, stover yield and harvest index.

  Sunflower, Fertilizers Combinations, Yield
  Agrotechnology Discipline, Khulna University
  
  
  Crop-Soil-Water Management
  Sunflower, Fertilizer

This research was conducted in order to address the following objective:

•   To  study the  mowth  and  yield performance of sunflower varieties at different fertilizer combinations.

 

A field experiment was conducted at the Field Laboratory of Agrotechnology Discipline. Khulna University, Khulna. The materials used and methodologies followed in the investigation are described below. The experimental land was prepared thoroughly by three ploughing with country plough followed by laddering. All weeds, stubbles and crop residues were removed and the field layout was done. All basal doses of fertilizers were incorporated well into the soil and finally the field was made ready for sowing-
Combination of nutrients with two varieties of sunflower formed the treatment variables_ The treatments were:

Factor A. Variety 2

1- Local variety (V g ): This was a local cultivar collected from the farmer of Hogladanga. Batiaghata, Khulna_ Actually this local cultivar is used by the farmer for ornamental purpose.
Kirani (V2): This is a variety developed by Bangladesh Agricultural Research Institute (BARI) and was collected from Bangladesh Agricultural Development Corporation (BADC) Regional Office, Khulna.

Factor B. Fertilizer treatments: 6

The experiment was laid out in a factorial randomized complete block design (RCBD) with three replications. Unit plot size was 4 m x 2.5 m. Blocks were separated by a distance of 1 m while the distance between two plots was 0.5 m. Seeds of sunflower were sown at 2-3 cm deep furrows maintaining a spacing of 25 cm from plant to plant and 50 cm from row to row. After placement in the furrow, seeds were covered with soil by a light pressure of hand. The experimental plots were irrigated lightly after seed sowing. Seedling emergence started after 5 days and completed within 8 days of sowing. The vacant hills were filled up by transplanting seedlings at the early stage of crop so as to maintain the desired plant population.

Keeping one healthy seedling hill-1 other seedlings were carefully uprooted by hand pulling after their establishment. Weeding was done twice, once at 30 DAS and the other one at 45 DAS. Half of urea and whole amount of triple superphosphate (TSP), muriate of potash (MoP), gypsum, and zinc sulphate were applied as basal dose at the time of final land preparation. The rest of urea was side dressed in two equal splits at 30 and 45 DAS followed by 2"d and 3rd irrigation. Propping was given with bamboo sticks to five randomly selected plants from each plot on 50 DAS.

When 80% of the plant leaves as well as dorsal side of the disc turned yellowish and central disc florets dried up and shed off on touch of fingers the crop was assessed to attain maturity. The plants from each unit plot was harvested, bundled and tagged separately. The heads were beaten with bamboo sticks to separate the seeds from heads. After separation, the seeds were winnowed to remove trashes and inert materials. Prior to storing, the seeds were sun dried for three days. The seeds were cleaned and stored in gunny bags.

Data Collection Five plants from each plot excluding the border plants were selected randomly. Data were collected from the harvested and tagged plants on the following Parameters:

1. Plant height (cm)

2. Head diameter (cm)

3. Number of filled seeds head-'

4. Number of unfilled seeds head-'

5. Seed yield (t ha-1)

6. Stover yield (t ha-')

7. Weight of 1000-seeds (g)

8. Harvest index (%)

Statistical analysis

All the collected data were analyzed following the ANOVA technique. The means were compared by Duncan's New Multiple Range Test (DMRT) (Gomez and Gomez, 1984). Regression analysis was done between yield and yield attributes.

  South Asian J. Agric. 2013-2015. 6 (I & 2): 117-126 ISSN 1991-0037
  
Funding Source:
1.   Budget:  
  

The highest seed yield (2.03 t ha-1) was produced by T3 treatment and the lowest yield (0.70 t ha-1) was found when no fertilizer was used. In V, seed yield (1.53 t ha-1) was higher than that of VI. In the combined effect of variety and fertilizer maximum (2.07 t ha-1) and minimum (0.68 t ha-1) seed yield were found in the combination of V,T3 and V,T, respectively. Treatments T2 and T, gave the maximum (4.92 t ha-1) and minimum (1.21 t ha-1) stover yield respectively. Stover yield in V2 (3.51 t ha-1) was greater than that of V, (3.21 t ha-1). The maximum (5.69 t ha-1) and the minimum (1.13 t ha-) stover yield were found in the combination of V,T, and V2T,, respectively. The maximum harvest index (36.68%) was recorded in T, treatment and minimum value (25.46%) was recorded in T5 treatment. V, gave the higher harvest index value (32.16 %) than Vi (31.33%). V,T, gave the highest harvest index (37.43%) and V,T5 gave the lowest harvest index (24.15%). The results of the present study demonstrated that all the growth, yield and yield attributes were influenced significantly by fertilizer application. However, varieties as well as variety X fertilizer interaction did not show significant influence on most of the parameters studied. In fact, the present research work needs to be repeated in the forthcoming years in different agro-ecological zones of the country to confirm its fitness and for its generalization.

  Journal
  


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