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Response of morphological and biological characteristics of two sunflowers (Helianthus annuus L.) hybrid against the application of nitrogen and phosphorous under the rainfed conditions of Rawalakot Azad Jammu and Kashmir

Khan Irfan Khan, Zohaib Asad

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Int. J. Biosci.15(6), 26-36, December 2019

DOI: http://dx.doi.org/10.12692/ijb/15.6.26-36


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The sunflower (Helianthus annuus L.) is an important oil seed crop of subtropical and temperate zones. Among the all other nutrients required by sunflower, nitrogen and phosphorus are the more essential. In this study effectiveness of these nutrients on the yield, quality and nutrient uptake of two sunflower hybrids (Parsaun-3 and Super-2216) was explored. Results demonstrated that the application of nitrogen and phosphorus or their combinations significantly increased growth, yield and NP-uptake as compared to the control. Among different N levels, the maximum plant height, head diameter and stem girth (186.1, 19.34 and 6.69 cm, respectively) was recorded for the treatment receiving N at the rate of N180 kg ha-1. Similarly, by the application of phosphorus @130 kg P2O5 ha-1 highest plant height, head diameter and stem girth of 180.2, 18.90 and 6.55 cm, were recorded respectively. For combined NP treatments, the plant height, head diameter and stem girth did not show significant improvement as compared to the control (N0P0). Application of N, P and their combined use significantly increased seed weight between 98.7-117.3, 103.2-106.1 and 106.9-127.8 g, respectively and maximum values were recorded for NP combination of 180+130 kg ha-1. The number of achene’s head-1 and thousand grain weight were also significantly improved by applying N and P individually. However, combine effect was non-significant. The achene, biological and dry matter yields were significantly improved in all manners. Combined use of N+P @180+130 kg ha-1 increased achene, biological and dry matter yields by 36.99, 31.81 and 29.90 percent, respectively over the N0P0 treatment combination. It is concluded that these nutrient in different combination would be helpful for improving yields of sunflower in nutrient exhaustive/ eroded area of Rawalakot, Azad Jammu and Kashmir.


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Response of morphological and biological characteristics of two sunflowers (Helianthus annuus L.) hybrid against the application of nitrogen and phosphorous under the rainfed conditions of Rawalakot Azad Jammu and Kashmir

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