Cultivation of grain maize in the Sądecka Valley
Aleksander Szmigiel
kszur@urk.edu.plAkademia Rolnicza w Krakowie (Poland)
Stanisław Kiełbasa
Zespół Szkół Rolniczych w Nawojowej (Poland)
Abstract
Studies on possibilities of grain maize cultivation in sub-montane conditions of the Sądecka Valley were conducted on -mountain type soil at Nawojowa (365 m a.s.l.) in 1998–2000 Two early cultivars: Eslia (FAO-170) and Jana (FAO-190) and 4 mid-early ones Ela (FAO-210), Mieszko (FAO-230), KLG (FAO-230) and LG 2190 (FAO-240) were used for the experiment. Mineral fertilization dosed 80 kg P2O5∙ha-1, 90kg K2O∙ha-1 and 90 kg N∙ha-1 was applied prior to sowing, while 40 kg N∙ha-1 was used as topdressing. Under the conditions of the experiment field maize emergence was weak; considerable plant losses between emergence and harvest caused that plant density during harvest was much lower than planned. The obtained grain yield, on average between 6.60 and 8.11 t per ha, should be considered as high. Considerable differences in grain yield occurred in particular years. The studies did not provide a consistent answer concerning the cultivar varieties selection because their yields were much differentiated in years. The highest grain yields were produced in the year when rainfall was low during growing season and the air temperature was higher than the many-year average. Grain water contents at harvest ranged between 26.1% and 45.6%, depending on the year and variety. Protein contents in grain ranged between 7.06 and 9.35%, depending on the variety and the weather course in particular years.
Keywords:
grain yield, maize, sub-montane conditionsReferences
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Stanisław KiełbasaZespół Szkół Rolniczych w Nawojowej Poland
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