Effect of nitrogen fertilization and variety differences on nitrate reductase activity of wheat (Triticum aestivum)
1999
Manolov, I. | Chalova, V. | Kostadinova, S. (Agricultural University, BG-4000 Plovdiv (Bulgaria))
The study included 9 varieties and lines winter soft wheat grown on three levels of nitrogen fertilizing (N0, N120, N240). The effect of nitrogen fertilization, variety differences and their interaction on plant nitrate content (NC) and nitrate reductase activity (NRA) in tilling, jointing, flowering stages and yield were studied. Analyse of variance showed that nitrogen fertilization had the highest effect on Nc and NRA. The three fertilizing levels formed different models of Nc and NRA changes during plant growth. Concerning to obtained yields, variety differences showed much lower effect in comparison with soil nitrogen level. The varieties Sadovo1, Record, and LC-318 were the most productive at nitrogen level N240.
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