Abstract:
The application of chemical
fertilizers on the grain bean crop must be
done due to the plant peculiarities (high
consumption of nutrients, root system
underrepresented, plant ability to synthesize
up to 85% of the needed nitrogen) and its
high sensitivity to stress conditions.
Although the bean requirements for
nutrients are high, the plant response to the
application of fertilizers is smaller, the
obtained production increase will vary
widely depending on the type of fertilizer,
the applied dose, but also on the climatic
conditions in the area. The paper presents
the experimental results, carried aut during
2008-2010 at Agricultural Research-
Development Station Secuieni, Neamţ
County, Romania (A.R.D.S. Secuieni-
Neamţ), on the application of phosphorus
and nitrogen fertilizers in a long – term
experiences. By using the two fertilizers
were obtained yield increases of 3-27%.
These were directly proportional to the dose
of the applied fertilizer. By applying the
phosphorus fertilizer, the average
production increases, compared with the
control variant, were ranged from 7 to 15%.
Average gains, obtained by the using of
nitrogen fertilizers, compared with the
control variant, were ranged from 12 to
27%. Marginal production increases,
obtained by applying phosphorus fertilizers
were of 1,52-2,92 kg beans/ kg P2O5, and at
the nitrogen fertilizers, of 1,72-3,28 kg
beans/ kg N. In both cases, the marginal
increases obtained were inversely
proportional to the doses of the apllied
fertilizer.
