Abstract:
During 2010-2012 we made a study regarding the influence of a humic fertilizer (Lignohumat) on some morphological
and physiological traits of maize. Lignohumat has a high content of humic acid and microelements, acting as a growth
stimulent and anti-stress agent for plants. The study was carried out in the pedo-climatic conditions of the Moldavian
Plateau, (Ezareni Farm, Iași, 47°5’-47°10’ N lat. 27°28’-27°33’ E long.), on a 3 - 4 % slope, cambic chernozem with
clay-loamy texture. The soil has a medium content of N and P and good content of K, slightly acid pH and 2.5 – 3.0 %
humus content. There were applied two treatments with the humic fertilizer, one on seeds with a dose of 100 g/10 l
water/t seeds and one on vegetation, on the 3-4 leaves stage, using 60 g/ha / 300 l water. We determined the average
number of seeds per cob, average plant height and leaf chlorophyll content. The results of the three experimental years
revealed a positive influence of the humic fertilizer on the assessed traits, the differences compared to the control being
statistically assured. Compared to the control, which had an average plant height of 178.5 cm, a chlorophyll content of
47.4 CCI and cobs with 508.1 seeds, the variant treated with Lignohumate recorded higher plants (with 8 cm), with
better chlorophyll content (3,5 CCI higher) and with more seeds/cob (25,1 more seeds).
