Effect of various rates of NPK on concentration, uptake and use efficiency of nutrients in linseed under saline sodic soil environment

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Research Paper 01/12/2019
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Effect of various rates of NPK on concentration, uptake and use efficiency of nutrients in linseed under saline sodic soil environment

Ayesha Zafar, Ghulam Sarwar, Sarfraz Hussain, Muhammad Aftab, Muhammad Sarfraz, Muhammad Zeeshan Manzoor, Aneela Riaz, Asifa Naz, Abid Niaz
Int. J. Biosci.15( 6), 8-15, December 2019.
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Fertility status of saline-sodic soils is poor due to high concentration of soluble salts and exchangeable sodium percentage. Nitrogen concentration of these soils is low due to low organic matter content and high volatilization losses due to high pH. An experiment was carried on saline sodic soil to examine the effect of various levels of NPK on the concentration, uptake and use efficiency of NPK in linseed. The selected field was saline sodic in nature with sandy loam texture having pH value 8.57, SAR = 24.48 (mmol L-1)1/2, ECe = 5.14 dS m-1 and deficient in OM. The experiment was comprised of five N levels i.e. (0, 105, 140, 175 and 210 kg of N ha-1) with standard dose of P and K fertilizer. The experiment was repeated thrice under RCBD design. Intercultural operations were performed according to the experimental requirement. The crop was harvested at maturity & analyzed for N concentration and uptake in grains and straw, total N uptake by linseed and N use efficiency. The data regarding NPK concentration in grains and straw, NPK uptake by grains and straw, total NPK uptake by linseed and NPK use efficiency in linseed were determined. The all above parameters were enhanced by increasing fertilizer rate and maximum results were achieved in T5 treatment where N was applied @ 210 kg ha-1 (150 % of recommended dose).


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