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Publication Date
1977
Description
The effect of increasing rates of nitrogen (80, 140, 200, 260, and 320 kg/ha) on the yields of above-ground biomass and nutrients in alfalfa was studied in 1974 and 1975. Application of nitrogen increased dry matter and crude protein production in relation to the unfertilized control, but the yield increase was statistically insignificant. Further it was shown that increasing rates of nitrogen had a negative effect on the number and weight of rhizobia. A close negative correlation of high significance ( estimated by the t-test) was found between the rates of nitrogen and the number of rhizobia. The experiments conducted in the sugar beet growing area proved that it is not possible to increase the productive capacity of alfalfa by means of intensive nitrogen nutrition. This practice would not be efficient from the economic point of view and therefore not suitable for application in practice.
Citation
Halva, Eduard and Lesak, Josef, "Problems of nitrogen nutrition of Medicago sativa L. with respect to rhizobia" (1977). IGC Proceedings (1977-2023). 27.
(URL: https://uknowledge.uky.edu/igc/1977/sess7/27)
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Problems of nitrogen nutrition of Medicago sativa L. with respect to rhizobia
The effect of increasing rates of nitrogen (80, 140, 200, 260, and 320 kg/ha) on the yields of above-ground biomass and nutrients in alfalfa was studied in 1974 and 1975. Application of nitrogen increased dry matter and crude protein production in relation to the unfertilized control, but the yield increase was statistically insignificant. Further it was shown that increasing rates of nitrogen had a negative effect on the number and weight of rhizobia. A close negative correlation of high significance ( estimated by the t-test) was found between the rates of nitrogen and the number of rhizobia. The experiments conducted in the sugar beet growing area proved that it is not possible to increase the productive capacity of alfalfa by means of intensive nitrogen nutrition. This practice would not be efficient from the economic point of view and therefore not suitable for application in practice.
