Effect of Nitrogen Rate on Growth,Yield, Economics and Crisps Quality of Indian Potato Processing Cultivars |
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Authors: | Parveen Kumar S K Pandey B P Singh S V Singh Dinesh Kumar |
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Institution: | 1.Central Potato Research Institute Campus,Modipuram,India;2.Central Potato Research Institute,Shimla,India |
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Abstract: | A field study was conducted during 2000–2001 and 2001–2002 at the Central Potato Research Institute Campus, Modipuram, India,
in order to increasing the processing-grade tuber yield of India’s first ever developed processing potato cultivars, Kufri
Chipsona-1 and Kufri Chipsona-2. Tuber yield and post-harvest quality characteristics were evaluated in response to five N
levels (0, 90, 180, 270 and 360 kg N ha-1). The crop growth traits (stem number, plant height and compound leaf number) responded positively to N application, whereas
the effect of N fertilization on processing-grade tuber number, total tuber number per ha and tuber number per plant was quadratic.
There was a steady increase in tuber weight per plant, processing-grade tuber yield, total tuber yield and biomass yield in
response to N application. Kufri Chipsona-1 produced a 23.6% higher tuber yield per plant than Kufri Chipsona-2. Agronomic
N use efficiency decreased linearly with increased N doses. Specific gravity and tuber dry matter percentage responded positively
to N application, while crisps colour (at harvest and after storage) and reducing sugars remained unaffected. Cultivar was
the major factor that influenced the tuber quality parameters (specific gravity, crisps colour). Higher values of these quality
traits were observed in Kufri Chipsona-2 as compared to Kufri Chipsona-1. Net income and benefit cost ratio (B:C) indicated
that Chipsona cultivars should be fertilized with 270 kg N ha-1 for realizing higher processing-grade yields and desirable quality tubers. |
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