Growth of head cabbagei relation to nitrogen source, fertilizer rate and soil acidity
1998
Stancheva, I. | Rajkova, L. (Institut po Pochvoznanie i Agroekologiya "N. Pushkarov", Sofia (Bulgaria))
The fresh and dry biomass accumulation of cabbage grown in the weakly acid soil increased with the increasing of fertilizer rates from 0 to 4g salts and the biomass production showed the highest value at this soil type. A fertilizer rate of 4 g salt/kg soil redused the biomass accumulation of cabbage grown both in the middle acid and in the strongly acid soil. A fertilizer rate of 2.5g salts/kg soil appeared to be optimal for the plants of these soil type. More significant increase of the leaf nitrate content compared to the control was found in the plants grown in the strongly acid soil (from 1.3 to 16.2 times). The plants grown in the middle acid and weakly acid soils increased leaf nitrate content from 0.1 to 4.4 times and from 0.1 to 2.6 times respectively.
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