Nitrogen uptake and expense in durum wheat depending on genotype and nitrogen fertilization
| Autor: | G. Panayotova, M. Almaliev, S. Kostadinova |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Agricultural Science and Technology, Vol 9, Iss 1, Pp 26-34 (2017) |
| Druh dokumentu: | article |
| ISSN: | 1313-8820 1314-412X |
| DOI: | 10.15547/ast.2017.01.005 |
| Popis: | Abstract. Nitrogen uptake and expense of durum wheat were studied under the conditions of fertilized field experiment on soil type Pellic vertisol. The seven genotypes - Progress, Vazhod, Victoria, Predel, Deana, Zvezdica and Elbrus selected at the Institute of Field Crops – Chirpan, Bulgaria, were grown in two field crops rotation of cotton and durum wheat under rainfed conditions for a period of three vegetations in years 2011-2013. The spring treatments of nitrogen as NH NO were as follows: N , N , N and N . The total N uptake in the above ground biomass of durum wheat increased with the amount of applied nitrogen 4 3 0 60 120 180 -1 and during climatically favorable years reached 220 kg N.ha . A tendency was found that the new genotypes uptook more N, compared to varieties Progress and Vazhod. The N expense of the new cultivars Predel and Zvezdica showed the highest amount of N per 1 ton of grain, 40.7 and 41.1 kg, respectively. Strong positive correlation was found between N fertilization and N uptake and expense for 1 ton of grain. The regression model indicated that N uptake with the grain -1 and straw and N expense depending on N fertilization occurred with delay. With N fertilization of durum wheat at rates of up to 180 kg N.ha each kilogram of -1 -1 applied N fertilizer increased the average expected N uptake with 7 kg.ha and N expense with 0.66 kg.ton grain. |
| Databáze: | Directory of Open Access Journals |
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