The influence of tillage on the soil microbiological activity | Augsnes apstrādes ietekme uz augsnes mikrobioloģisko aktivitāti
2013
Dubova, L., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Ruza, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Alsina, I., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Steinberga, V., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture
The experiments were established on the experimental fields at the Training and Research Farm Peterlauki of the Latvia University of Agriculture. The soil at this site is an Endogleyic Calcisol (GLu) with pH KCl 6.8 and low humus content (20 g kgE-1). Half of the six plots (three variants) were conventionally tilled (CT), but the other half of the plots were subjected to a reduced tillage (RT). The CT plots were ploughed to the depth of 25 cm, but the RT plots treatment had consisting of shallow non-inversion tillage at the depth of 10 – 12 cm. Winter wheat, spring rape and barley were grown during the experiments. Soil biological activity was expressed as activity of fluorescein diacetate (FDA) hydrolysis, dehydrogenase, soil basal respiration and biomass of soil microorganisms. Results of soil respiration intensity were affected mainly by variations in the sampling period, as well as in soil tillage system less by crop rotation. Higher soil respiration intensity and soil microorganisms biomass was detected at the beginning and end of vegetation period. The less intensity of these two measured parameters was observed in summer months. More significant influence of tillage system was established in the 10 – 20 cm soil layer.
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