Effects of increased nitrogen supply on the production of some species of the genus Sorghum | Uticaj pojačane ishrane azotom na produkciju nekih biljnih vrsta roda Sorghum
2010
Ikanović, J., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Glamočlija, Đ., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Dražić, G., Fakultet za primenjenu ekologiju - FUTURA, Beograd (Serbia) | Staletić, M., Institut za strna žita, Kragujevac (Serbia) | Kajgana, M., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Lakić, Ž., Poljoprivredni fakultet, Banja Luka (Bosnia and Herzegovina) | Živanović, Lj., PKB Korporacija, Beograd - Padinska Skela (Serbia)
This paper presents the variability of morphological traits of three genotypes: NS Džin (forage sorghum), Zora (Sudan grass) and Siloking (interspecies hybrid) depending on the nitrogen rates used for supplementary plant nutrition during 2007 and 2008. The following parameters were observed: plant height, leaf weight, stem weight, as well as, the proportion of leaves. The obtained results show significant variations in observed traits among genotypes. Nitrogen used in plant nutrition positively affected the increase in total biomass and leaf participation in it. This parameter is of interest to manufacturers of animal feed. Sorghums are plants with a good root system, strong suction power and plants that well adopt unused nitrogen salts that are used for crop nutrition. The increase in the effect of nitrogen rates is mainly affected by the precipitation sum and distribution. According to the two-year averages, Siloking genotype gave the highest total green biomass, leaf weight was greatest in the genotype NS Džin, while the leaf proportion of a genotype Zora was greatest. The effect of nitrogen depended on the weather conditions, or the precipitation distribution, so the optimum nitrogen rate in both years was 105 kg N/ha.
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