Aspects of nitrogen fertilizer rate on tuber dry-matter content of potato cv. Record |
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Authors: | P D Jenkins D G Nelson |
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Institution: | (1) Department of Agricultural Sciences, University College of Wales, SY23 3DD Aberystwyth, Dyfed, Wales, UK;(2) Present address: Branston Potatoes PLC, Mere Road, LN4 1NJ Branston, Lincoln, UK |
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Abstract: | Summary Effects of three rates of fertilizer nitrogen, viz. 80, 160 and 240 kg N/ha, on tuber yield and dry-matter percentage in potato
cv. Record were compared in two experiments. Crop nitrogen uptake increased with application rate but total uptake differed
between experiments. Tuber yield was highest following application of 160 or 240 kg N/ha but differences between these two
rates were not significant. Tuber dry-matter percentage was reduced in one experiment with increasing nitrogen rate, but in
the second experiment final dry- matter percentage was highest following application of 240 kg N/ha. In all treatments, positive
linear relationships were found between dry matter percentage and mean fresh weight of tubers >30 mm, but within experiments,
the regression coefficients were generally reduced by increased crop nitrogen uptake. |
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Keywords: | processing tuber fresh weight Solanum tuberosum L |
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