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Sheoran, P., Sardana, V., Singh, Sher, Kumar, A., Mann, A., Sharma, P.. (1394). Agronomic and physiological assessment of nitrogen use, uptake and acquisition in sunflower. , 10(2), 109-121. doi: 10.22069/ijpp.2016.2783
P. Sheoran; V. Sardana; Sher Singh; A. Kumar; A. Mann; P. Sharma. "Agronomic and physiological assessment of nitrogen use, uptake and acquisition in sunflower". , 10, 2, 1394, 109-121. doi: 10.22069/ijpp.2016.2783
Sheoran, P., Sardana, V., Singh, Sher, Kumar, A., Mann, A., Sharma, P.. (1394). 'Agronomic and physiological assessment of nitrogen use, uptake and acquisition in sunflower', , 10(2), pp. 109-121. doi: 10.22069/ijpp.2016.2783
Sheoran, P., Sardana, V., Singh, Sher, Kumar, A., Mann, A., Sharma, P.. Agronomic and physiological assessment of nitrogen use, uptake and acquisition in sunflower. , 1394; 10(2): 109-121. doi: 10.22069/ijpp.2016.2783

Agronomic and physiological assessment of nitrogen use, uptake and acquisition in sunflower

International Journal of Plant Production
مقاله 2، دوره 10، شماره 2، اردیبهشت 2016، صفحه 109-121    اصل مقاله (1.38 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22069/ijpp.2016.2783
نویسندگان
P. Sheoran* 1؛ V. Sardana2؛ Sher Singh3؛ A. Kumar4؛ A. Mann5؛ P. Sharma2
1ICAR-Central Soil Salinity Research Institute, Karnal, India.
2Punjab Agricultural University, Ludhiana, India.
3ICAR-Vivekanand Parvatiya Krishi Anusandhan Sansthan, Almora, India
4ICAR-Central Soil Salinity Research Institute, Karnal, India
5ICAR-Central Soil Salinity Research Institute, Karnal, India. b
چکیده
A field experiment was conducted to study the effects of N fertilization on uptake,
accumulation/remobilization, use efficiency and yield of sunflower grown in alluvial plains of
northwestern India comprising four hybrids (PSH 996, PAC 3789, PSH 569 and SH 3322)
and five N levels (Control, 40, 80, 100 and 120 kg N ha-1) in split-plot design with three
replications. Increased N fertilizer rates significantly prompted sunflower yield only up to 100
kg N ha-1. Every additional kilogram of N taken up increased sunflower yield by 26 kg ha-1.
Significant genetic variation for seed yield and NUE traits explicated PSH 569 as the efficient
one at sub-optimal N application while PSH 996 outperformed others at N80, N100 and N120. Dry
matter accumulation pattern revealed average harvest index of 30% with 29% of the biomass as
stalk, 19% as leaf and 22% as thalamus. Temporal changes in N acquisition indicated most of
the total N uptake upto 50% flowering while maximum remobilization takes place during
reproductive phase. Significant correlation between N uptake and N use efficiency parameters
with yield indicate the importance of N nutrition in sunflower; LAI (r=0.841 **), N uptake
(r=0.956**), NUpE (r= -0.814**), NUtE (r= -0.787**), NUE (r=-0.802**). Variation in NUE was
more closely associated with NUpE (r=0.996**) than NUtE (r=0.812**) and linearly decreased
with increasing leaf greenness (R2=0.70) and total leaf area (R2=0.81). This work will
complement other studies to establish a baseline for breeding N efficient sunflower genotypes
be grown under semi-arid tropical conditions in India and similar environments.

کلیدواژه‌ها
N uptake؛ Accumulation؛ Efficiency indices؛ Yield؛ Genotypes؛ Sunflower
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