Joint International Conference on Long-term Experiments ...

EFFECT OF BIOFERTILIZATION ON PARSLEY YIELD AND N CONTENT
ON TWO SOILS
Ida Kincses 1 - Tibor Filep 2 - Andrea B. Kovács 1 - Péter T. Nagy 1 – Imre Vágó 1
1 University of Debrecen, Department of Agricultural Chemistry, Debrecen
2 Research Institute for Soil Science and Agricultural Chemistry of the Hungarian
Academy of Sciences, Budapest
ABSTRACT
A pot experiment was carried out to investigate effect of N fertilizer and biofertilizer on
parsley (Petroselinum tuberosum) yield and N content of plant, as well as the 0.01 M
CaCl2 soluble N concentrations in soils. Two soils were used, one of them is a
chernozem with slightly acidic pH and with high content of organic matter, and the
other one is an acidic sandy soil with low organic matter content.
On chernozem, the N fertilization significantly increased the yield of plant, while
there was no significant biofertilizer effect. On sandy soil, the dry matter of plants
increased with increasing N doses comparing to control, but no correlation has been
found between biofertilizer and dry matter weight.
Investigating N content of plants on chernozem soil, it was found that N
fertilization enhanced the N concentration in plant, but there was no relationship
between N content and biofertilizer rates at all. For sandy soil, at high rates of N the
biofertilization caused an increase in N concentration of plant, while at lower doses just
the opposite was noticed. So between two soils there was a remarkable difference: in
case of acidic sandy soil, the adding of biofertilizer caused an increase in both plant
biomass and in N content of leaf. These effects are not appeared for chernozem. Due to
the very low N supply ability of sandy soil, the increment of microbes due to
biofertilization caused N immobilization, because the enhanced microbial biomass take
up soluble N.
Based on data from experiment, it can be concluded that positive effect of
biofertilization on yield, N content of plant and soil displayed only on chernozem soil
during that short period of investigation. On the acidic soil with low organic matter
content, these effects are no appeared because of N immobilization by microbes.
Keywords: N fertilization, biofertilization, parsley, pot experiment, 0,01M CaCl2
soluble N-forms
INTRODUCTION
In horticulture cropping, the main goal is to reach appropriate quality and quantity of
crops, which mainly determined by genetics parameters of plants, ecological
circumstances and the nutrient status of soil. The nutrient supply is the one of the most
important factor to get maximum yields. In our country, the nutrient supply is based on
adding to soils chemical fertilizers.
Biofertilizers are an alternative way to substitute mineral fertilizers for increasing
soil fertility and crop production. Biofertilizers are products containing living cells of
different types of microorganisms, which have an ability to convert important elements
from unavailable to available form through biological processes (HEGDE et al., 1999).
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