The influence of drought on the utilisation of nitrogen ( ¹⁵ N) by two modern and one historical spring barley ( Hordeum vulgare L.) varieties

Hejnák, Václav and Ernestová, Zdislava (2007) The influence of drought on the utilisation of nitrogen ( ¹⁵ N) by two modern and one historical spring barley ( Hordeum vulgare L.) varieties. Cereal Research Communications, 35 (2). pp. 445-448. ISSN 0133-3720

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Abstract

In an experiment with two modern varieties (Amulet and Krona) and one historical variety (Nűrnberg) of spring barley stress, invoked by drought, significantly reduced the % content of N and the total amount of accumulated N in the plant bodies in all varieties. On the contrary significantly increased the percentage of N from fertiliser ( ¹⁵ N) to the total nitrogen in the plants. Varietal differences were expressed as a tendency to greater accumulation of total N and N from fertiliser ( ¹⁵ N) in the modern varieties than in the variety Nűrnberg. On the contrary this variety was found that there was a greater proportion of ¹⁵ N to the total amount of N in the plants. Under normal moisture conditions the nitrogen from the fertiliser ( ¹⁵ N) was taken in and utilised by the spring barley primarily in the first half of vegetation period and, as a rule, its accumulation in the plants peaked during flowering. Drought slowed down its intake and usage and shifted the maximum accumulation to the post-stress i.e. post-floral period.

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