The activity of soil microorganisms in the different crop rotation systems | Augsnes mikroorganismu aktivitāte dažādās augu maiņas sistēmās
2014
Steinberga, V., University of Latvia, Riga (Latvia). Inst. of Microbiology and Biotechnology | Mutere, O., University of Latvia, Riga (Latvia). Inst. of Microbiology and Biotechnology | Dubova, L., Latvia Univ. of Agriculture, Jelgava (Latvia). Inst. of Soil and Plant Sciences | Alsina, I., Latvia Univ. of Agriculture, Jelgava (Latvia). Inst. of Soil and Plant Sciences | Jansone, I., State Stende Cereals Breeding Inst., „Dižzemes”, Dižstende, Lībagi parish, Talsi municipality (Latvia)
Field trials were carried out in the experimental cereal breeding fields in Stende (Latvia), the area characterized by northern temperate climate. The soil had been under short-term organic or conventional crop management and was then subjected to crop rotation using buckwheat (Fagopyrum esculentun Moench.) and wheat (Triticum aestivum L.) as precrops; barley (Hordeum vulgarum) as the following crop as well as two fertilizer regimes under common organic and conventional practices. As the evaluation criteria of the soil quality, its physical-chemical (pH value, organic matter, N, P, K) properties were tested. In addition, the following biological properties were estimated: plate counts of different physiological groups of microorganisms (bacteria, actinomyces and microscopic fungi) and activity of cellulose degradation. The obtained data showed that soil microbial number and activity were higher in the organic farming system in comparison with the conventional one. Wheat in comparison with buckwheat as precops increased the number of soil microorganisms as well as cellulose degradation activity.
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