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Comparison of trichoderma sp. use efficiency on cucumbers and lettuce

Published in Scientific Papers. Series B. Horticulture, Vol. LVI
Written by Laila DUBOVA, Ina ALSIŅA, Vilhelmine ŠTEINBERGA

The effect of additional soil microorganisms’ preparations (Trichoderma viride, Trichoderma lignorum) on cucumber cv. ‘Pioneer’ and lettuce cv. ‘Grand Rapids’ growth and quality as well as peat substratum biological activity was studied. Trichoderma sp. added as liquid culture in concentration 20 and 100 mL m-2. Substratum was treated 3 days before plants were potted. Plant growth parameters and yield was analyzed. Soil respiration intensity was measured by changes of carbon dioxide, soil enzymatic activity assessed by dehydrogenase and fluorescein diacetate (FDA) hydrolysis activity. Trichoderma viride stimulated plant vegetative growth. Both preparations increased plant fresh weight in comparison with control. The increased level of chlorophylls was observed in cucumber leaves as effect of Trichoderma lignorum. Plant species had different sensitivity to additional microorganisms. Effect of preparation depended on plant development stage. Microorganisms’ preparations differently affect soil enzymes activity. Peat substratum without plants showed decreased soil respiration intensity, but increased dehydrogenases activity.

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