Effect of Nitrogen Rate on Growth, Yield, Economics and Crisps Quality of Indian Potato Processing Cultivars

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.

Effect of Different Levels of Nitrogen on Growth and Yield in Potato (Solanum tuberosum L.) CV. Kufri Khyati

“…Therefore, it increases the plant height and number of leaves per plant. This finding was close conformity with results of Bekhit et al, (2005), Kumar et al, (2007) and Bose et al, (2008).…”

Effect of planting space on plant population at harvest and tuber yield in taro (Colocasia esculenta L).

“…The Nsukka location appeared to have provided conditions most suitable for cocoyam growth and development; hence all the cultivars performed best at that location. It has been reported by other researchers that yield of root crops are affected by changes in environmental conditions between sites and planting dates (Lu et al, 2001;Scheffer et al, 2005;Kumar et al, 2007;Mare and Mode, 2009). …”

Energetics, GHG emissions and economics in nitrogen management practices under potato cultivation: a farm-level study

“…These results are in partial agreement with the finding of Love et al (2005), which reported that net returns were relatively low without N, increased to a highest level at some intermediate N rate, and then decreased again at the highest N rates. Higher economic returns and GRF were obtained at higher N doses because of increased marketable and total tuber yield realized at higher N application (Kumar et al 2007). …”

“…Application of N can increase the size and number of tubers that ultimately enhance total yield (Kumar et al 2007). In addition, under-or oversupply of N may affect total number of tubers.…”