sodininkystė ir daržininkystė 25(4)

Table 5 Contents of total protein in pea seed in relationship to the seed dressing
chemicals
5 lentelë. Bendrøjø baltymø koncentracijos þirniø sëklose priklausomumas nuo sëklø
apdorojimo cheminiais preparatais
Seed dressing chemicals
Sëklø apdorojimas cheminiais
preparatais
Cultivar
Veislë
‘Brylant’ ‘Wenus’ ‘Marych’ ‘Eurika’
Mean
Vidurkis
%
No seed dressing chemicals
Sëklos neapdorotos 21.6 21.9 24.4 23.8 22.9
Sarfun / Funaben 22.5 22.4 24.8 24.4 23.5
Super Homai 22.6 22.7 25.2 24.5 23.7
Mean / Vidurkis 22.2 22.3 24.8 24.2
LSD (p = 0.05) for: cultivar – n.s. (not significant differences); seed dressing chemicals – n.s.;
interaction of cultivar and seed dressing chemicals – n.s. / R 05
: skirtumai tarp veisliø,
tarp sëklø apdorojimo cheminiais preparatais, tarp veisliø ir apdorojimo cheminiais
preparatais sàveikos neesminiai.
Discussion. The main source of plant protein, which is a staple nutrient in
foodstuffs, is found in leguminous plants, including pea, which are cultivated all
over the world. At present, it is recommended to increase the share of plant protein
in human diets. The content of this nutrient in leguminous plants is diverse and
depends on a plant species, genetic traits of cultivars and the course of the weather
conditions during the vegetative season. Such a strong response of pea to changeable
weather conditions has negative consequences for farmers. It is perceived as a
problem in many countries (Alvino and Leone, 1993; Martin et al., 1994; Fougereus
and Dore, 1997). In Poland, Jasiñska and Kotecki (1994), Kotecki (1990), Pisulewska
(1993) confirm that both seed yield and protein content in seeds, apart from
genetic traits of crops, also depend on climatic conditions, which prevail during the
growth and development of plants. The present study has clearly verified this hypothesis.
Slightly different moisture and temperature conditions, which occurred in
each year of the experiment, caused a significant difference in the content of protein
in the seeds of four seed pea cultivars. The trial has also demonstrated a positive
correlation between the yield of seeds and the protein yield, which is in accord with
other researches (Úwiêcicki and Úwiêcicki, 1981). The lowest total protein content
in the seeds of all the four pea cultivars was determined in 2004; it was 3% lower
than in 2005 and 4.2% lower than in 2006. Jasiñska and Kotecki (1994) show that
differences in the content of protein caused by climatic factors can range within
4.5%. The differences recorded hereby in the content of total protein in pea seeds
were caused, apart from genetic traits, by an immediate influence of weather conditions
as well as an indirect influence of seed dressing chemicals applied. The difference
to the advantage of seed dressing preparations, in relative values, was ca 2%,
but turned out to be statistically non-significant. The results reported by Kolasiñski
and Grzelak (1993) and Kolasiñski (1997) show that while selecting and applying
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