The effects of agrotechnics on potato yielding in Lower Silesia
Part I. Organic and mineral fertilisation
Kazimierz Chmura
sekretariat.kkios@upwr.edu.plKatedra Rolniczych Podstaw Kształtowania Środowiska, Akademia Rolnicza we Wrocławiu (Poland)
Zenobiusz Dmowski
Katedra Rolniczych Podstaw Kształtowania Środowiska, Akademia Rolnicza we Wrocławiu (Poland)
Lech Nowak
Katedra Rolniczych Podstaw Kształtowania Środowiska, Akademia Rolnicza we Wrocławiu (Poland)
Elżbieta Wilgosz
Katedra Rolniczych Podstaw Kształtowania Środowiska, Akademia Rolnicza we Wrocławiu (Poland)
Abstract
The aim of this work was to analyze the results of investigations carried out by various research units in the area classified by J. Dzieżyc as the 6th agro-natural region, including mostly the region of Lower Silesia. The experiments were conducted in 93 localities, in different years between 1954 and 1997. The potato varieties met in those experiments were classified into 4 groups, according to their earliness. The groups included: 15 early varieties, 15 mid-early varieties, 20 mid-late varieties and 24 late varieties. Reaction of the varieties to differentiated mineral and organic fertilization was evaluated. It was found based on the respective calculations that organic fertilization at the doses of 31–35 t/ha was sufficient in cultivation of mid-early potatoes. As regards mid-late and late varieties, which take advantage of the treatment for a longer time, manure doses exceeding 35 t/ha resulted in additional yield increases. Moreover, the increase in manure doses caused a significant rise of starch content in tubers of early, mid-early and late varieties. An increase in the level of mineral fertilization in the range from 240 to 400 kg NPK/ha resulted in the successive increase in the yield of mid-early and late varieties. However, fertilization at the doses exceeding 350 kg NPK/ha caused the decrease in starch content of tubers in mid-early, mid-late and late varieties. The highest yields of tubers: 22.5 t/ha with early varieties, 32.0 t/ha with mid-early and mid-late varieties, and 32.5 t/ha with late varieties were obtained by applying nitrogen doses of 120, 160 and 180 kg/ha, respectively. Nitrogen fertilization caused the decrease in starch content of tubers in early varieties. In the other earliness groups, starch content of tubers did not change at 40–120 kg N/ha. It fluctuated around 14.5% in mid-early varieties, and around 16% in late varieties.
Supporting Agencies
Keywords:
cultivars, manure fertilization, mineral fertilization, potato, starch, yieldReferences
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Authors
Kazimierz Chmurasekretariat.kkios@upwr.edu.pl
Katedra Rolniczych Podstaw Kształtowania Środowiska, Akademia Rolnicza we Wrocławiu Poland
Authors
Zenobiusz DmowskiKatedra Rolniczych Podstaw Kształtowania Środowiska, Akademia Rolnicza we Wrocławiu Poland
Authors
Lech NowakKatedra Rolniczych Podstaw Kształtowania Środowiska, Akademia Rolnicza we Wrocławiu Poland
Authors
Elżbieta WilgoszKatedra Rolniczych Podstaw Kształtowania Środowiska, Akademia Rolnicza we Wrocławiu Poland
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Copyright (c) 2004 Kazimierz Chmura, Zenobiusz Dmowski, Lech Nowak, Elżbieta Wilgosz
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