Growth and Yield of Sunflower (Helianthus annuus L.) Hybrids under Different Nutrient Management Practices

A study was conducted on clayey soils (vertisols) of southern Telangana zone (India) characterized by low soil organic carbon, low available nitrogen and medium available phosphorous (P) and high available potassium (K). The experiment involving seven nitrogen (N) management practices (T1 to T7) involving recommended dose of fertilizers (RDF) as soil application, varied rates of foliar application of nano urea (liquid) was laid out in randomized block design replicated thrice. All the treatments were supplied with basal 50% of soil applied urea fertilizer at the time of sowing except in T1 (No nitrogen application) treatment. Results revealed that application of recommended dose of fertilizers in three splits as soil application resulted into significantly highest growth, yield ( 1774 kg) and yield attributes of sunflower, and was found profitable (Benefit:Cost ratio = 3.47) over foliar application of varied rates of nano- urea spray. Foliar application of nano urea @ 2-4 ml L-1 in T3 to T7 treatments could significantly improve growth and yield of sunflower (by 546 to 744 kg) when compared to no nitrogen application treatment. However foliar application of nano urea showed significantly lesser growth and yield compared to soil application of RDF in three splits in rabi sunflower.

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“…This has led to more leaf area and drymatter. These results are in accordance with Pattanayak et al [11] and Ahmad et al [12].…”

Section: Growth Attributessupporting

confidence: 93%

Evaluation of the Foliar Application of Nano Urea on the Performance of Rabi Sunflower (Helianthus annuus L.)

Goud

Sudhakar

Pasha

et al. 2022

IJECC

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“…It contains sufficient amount of calcium, iron and vitamins like A, D, E and B complex [1]. The shortage of edible oils has become a chronic problem in India with increasing demographic pressure and sunflower can play an important role in meeting out the shortage of edible oils in the country by virtue of its shorter duration, low photo-and thermosensitivity and wider adaptability to different agro-ecological situations [2]. Though, sunflower has been proved to be as a highly promising crop under different agro-climatic regions of India, its productivity is quite low despite of the release of several hybrids and the development of an improved package of practices.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Incidence and Infestation Pattern of Sunflower Head Borer (Helicoverpa armigera) and Leaf Eating Caterpillar (Spodoptera litura) under the Influence of Climatic Factors

Dhinda,

Nayak,

Das

2024

IJECC

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Field experiments were conducted at Regional Research and Technology Transfer Station (RRTTS), Ranital, Bhadrak, OUAT during the summer seasons of 2019-20 and 2020-21 to study the seasonal incidence of sunflower head borer and leaf-eating caterpillar in sunflower in relation to the abiotic factor. The seasonal incidence of the target insects, Spodoptera litura and Helicoverpa armigera, was investigated using pheromone traps installed in the unprotected sunflower plots (10 m x 5 m) at the research block. The trap catches of male adults were expressed as a number of males trapped per trap per week. In the observation plots, the sunflower hybrid Aruna was cultivated with the approved agronomic package of techniques without any plant protection measures. Weekwise larval populations of Spodoptera litura and Helicoverpa armigera were counted from 10 randomly selected tagged plants starting from the initiation of damage and expressed as larval intensity i.e. average larval population per plant. Besides, weekwise incidence of the pest (leaf damage by tobacco caterpillar and head damage by head borer) were also recorded. The findings of the investigation indicated that tobacco caterpillars' adult activity commenced from the 5th to 6th standard weeks (1st and 2nd week of February) and peak activity in the 11th standard week (3rd week of March). Similarly, the larval population began to appear in the 6th to 7th standard weeks in 2020 and 2021, respectively with a peak population build-up stage during the 12th standard week and their activity steadily decreased as the cropping season progressed. The peak infestation stage coincided with the period of maximum larval activity and the pest caused sizable damage from the early vegetative stage to the peak flowering stage of the crop. The sunflower head borer (Helicoverpa armigera) infested sunflower crops throughout the reproductive stage of the plant with adult activity beginning in the 9th to 10th standard weeks (last week of February-first week of March) and attaining the peak in the 12th to 13th standard weeks (3rd-4th week of March). Similarly, the larval population began to appear in the 10th to 11th standard week and reached the peak in the 13th to 14th standard week (last week of March to first week of April). Various environmental parameters viz. temperature, relative humidity and rainfall were collected from the automated weather station of Gramin Krishi Mausam Sewa (GKMS) located at RRTTS, Ranital., These abiotic factors were correlated with trap catch, larval intensity, leaf damage head damage to study the influence of ecological parameters on pest incidence and infestation. The findings of the investigation indicated that among the abiotic factors temperature had a positive influence and relative humidity exhibited a negative effect on the population and damage of Spodoptera litura. All the temperature variables and bright sunshine hour (BSH) exhibited a significant positive correlation and relative humidity (afternoon) had a significant negative correlation with the head damage Helicoverpa armigera.

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Evaluation of conservation tillage practices for enhancing productivity of sunflower (Helianthus annuus L.) under rice fallow environment of Odisha

K RAMESH,

D PATEL,

A MAHAPATRA

et al. 2020

J. Oilseeds. Res.

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Field experiment was conducted to assess the effect of conservation tillage (reduced, minimum and zero tillage) and conventional tillage with three hybrids (DRSH-1, KBSH-44, MSFH-17) and three fertility levels (50% RDF,100% RDF and 150% RDF) on productivity of sunflower. Zero tillage recorded highest growth parameters, yield attributing characters and seed yield (1.91 t/ha), stover yield (4.36 t/ha) and oil yield (0.73 t/ha). Crop grown under zero tillage conditions was taller (165.7 cm), had more number of leaves/plant (30.3) and accumulated more dry matter (565 g/m2). Among the hybrids, KBSH-44 recorded the highest seed yield (1.81 t/ha), stover yield (4.22 t/ha)and oil yield (0.70 t/ha). Sunflower fertilized with 150% RDF recorded significantly highest seed yield (2.09 t/ha), stover yield (5.0 t/ha) and oil yield (0.81 t/ha) as well as the highest values of yield attributing characters which were promoted by the better growth attributing characters. Sunflower hybrids under zero tillage fertilized with 150% RDF (90:120:90 kg N: P2O5: K2O/ha) found most remunerative under rice fallow environment.

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Growth and Yield of Sunflower (Helianthus annuus L.) Hybrids under Different Nutrient Management Practices

Cited by 4 publications

References 3 publications

Evaluation of the Foliar Application of Nano Urea on the Performance of Rabi Sunflower (Helianthus annuus L.)

Evaluation of the Foliar Application of Nano Urea on the Performance of Rabi Sunflower (Helianthus annuus L.)

Seasonal Incidence and Infestation Pattern of Sunflower Head Borer (Helicoverpa armigera) and Leaf Eating Caterpillar (Spodoptera litura) under the Influence of Climatic Factors

Evaluation of conservation tillage practices for enhancing productivity of sunflower (Helianthus annuus L.) under rice fallow environment of Odisha

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