Dry Matter Production and Nitrogen Utilization by Six Potato Cultivars

Kleinkopf, G.E. and Westermann, D.T. and Dwelle, R.B. (1981) Dry Matter Production and Nitrogen Utilization by Six Potato Cultivars. Agronomy Journal. 73:799-802.

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Abstract

The rate and duration of tuber growth largely determines
the final potato (Solanum tuberosum L) tuber
yields. Cultivars that continue leaf development and
nutrient uptake while maintaining maximum tuber
growth rates may have higher final tuber yields, yet
different N requirements. The objective of this study
was to obtain information relating plant growth rates to
N availability for selected potato cultivars. Total dry
matter accumulation, and N assimilation patterns of
indeterminant cultivars, 'Russet Burbank', 'Lemhi Russet,
'Centennial Russet', and one advanced selection
A66107-51, were compared-with that of two determinant
cultivars 'Pioneer' and 'Norgold Russet', at three N
levels. Cultivars were grown in a field experiment on a
Portneuf silt-loam soil (Xerollic Calciorthids).

High available soil N levels at planting delayed the
linear potato tuber growth period 7 to 10 days but had
minor effects on the time of tuber initiation for the
indeterminant varieties. Maximum tuber growth rates
(tuber bulking) were 900 to 1,300 kg/ha/day. A66107-51
was superior in N-use efficiency to the other cultivars.
Between 70 and 100% of the total available N was utilized
by this cultivar in producing high yields. This information
may be used to select lines and cultivars that will
optimize production. A knowledge of plant growth and
N uptake rates can improve the fertilizer recommendations
for each cultivar.

Item Type:	Article
NWISRL Publication Number:	0464
Subjects:	Irrigated crops > Grass forage > Chemistry Irrigated crops > Potato Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:52
Last Modified:	23 Jan 2017 18:27
Item ID:	377
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/377