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Acta Agriculture Scandinavica Section B-Soil & Plant Science
Year: 2008 | Volume: 58 | Issue: 1 | Page No.: 35 - 42
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The influence of thermal shock and pre-sprouting of seed potatoes on formation of some yield structure elements
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Viacheslav Eremeev,
Alfons Lohmus,
Peeter Laaniste,
Juhan Joudu,
Liina Talgre
and
Enn Lauringson
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Abstract: For earlier potato yield formation we used pre-sprouting and thermal treatment
which both add to the physiological age of potato. At the same time, pre-sprouting
is a very time- and energy-consuming procedure. We investigated if thermal treatment
could replace pre-sprouting and how it affects the growth and development of potato
haulms and tubers. For that purpose an experiment was conducted in 2000-2002 to
examine the opportunities for growing potatoes by using different methods of pre-planting
treatment of seed tubers.
Early, middle and late maturing potato varieties (two Estonian varieties and one
Latvian) were used, each being subdivided into three variant categories: untreated,
thermal shock and pre-sprouting.
The experiment indicated that one or the other of thermal shock or pre-sprouting
shortened the time to emergence by up to 10 days. With pre-sprouting, the formation
of tubers started as soon as 45 days after planting and with thermal shock 50
days after planting, i.e., 5-10 days earlier than in the untreated variant.
Thermal shock of seed tubers had the greatest effect on the number of tubers per
plant, while pre-sprouting increased the average weight of tubers.
Both pre-sprouting and thermal shock had a strong effect on the weight of the
haulms in varieties with a longer growth period. |
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