Open AccessYield and quality of three potato cultivars under series of nitrogen rates
Author(s) -
Zaeen Ahmed A.,
K. Sharma Lakesh,
Jasim Ahmed,
Bali Sukhwinder,
Buzza Aaron,
Alyokhin Andrei
Publication year - 2020
Publication title -
agrosystems, geosciences and environment
Language(s) - English
Resource type - Journals
ISSN - 2639-6696
DOI - 10.1002/agg2.20062
Subject(s) - cultivar , dry matter , randomized block design , solanum tuberosum , specific gravity , yield (engineering) , starch , nitrogen , agronomy , fertilizer , horticulture , human fertilization , biology , chemistry , food science , materials science , metallurgy , organic chemistry
Undesirable growth of potato ( Solanum tuberosum L.) crop under an excessive N fertilizer application is the main obstacle presently. This research was conducted to investigate the response of different potato cultivars; Russet Burbank, Shepody, and Superior, and its qualitative characteristics under a series of N rates. Six rates of N fertilization (0–280 kg ha −1 ) were applied on 11 sites in a randomized complete block design, with four replications. Sites with ≥30 g kg −1 of soil organic matter (OM) produced total tuber yield, marketable yield, and tuber weight per plant 39.5, 45.2, and 54.9%, respectively, higher than sites with ≤30 g kg −1 of OM. Tubers specific gravity increased by 0.18% in the sites with ≥30 g kg −1 of OM. The total tuber yield for the three cultivars was maximized at 168 kg N ha −1 . Marketable specific gravity, starch, and dry matter content were achieved by applying 168 and 112 kg N ha −1 at ≤30 and ≥30 g kg −1 of OM sites, respectively. Russet Burbank produced a higher yield than Shepody and Superior cultivars significantly, but there was no significant difference among them regarding specific gravity. Excessive N application (>168 kg ha −1 ) decreased potato tuber production and quality.