Short-term effects of organic municipal wastes on wheat yield,microbial biomass,microbial activity,and chemical properties of soil |
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Authors: | Víctor?G?Franco-Otero Pedro?Soler-Rovira Diana?Hernández Esther?G?López-de-Sá Email author" target="_blank">César?PlazaEmail author |
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Institution: | 1.Instituto de Ciencias Agrarias,Consejo Superior de Investigaciones Científicas,Madrid,Spain |
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Abstract: | The objectives of this work were to (a) investigate the short-term effects of applications of mineral fertilizer, municipal
solid waste (MSW) compost, and two sewage sludges (SSs) subjected to different treatments (composting and thermal drying)
on microbial biomass and activity of soil by measuring microbial biomass C, adenosine 5′-triphosphate content, basal respiration,
and dehydrogenase, catalase, urease, phosphatase, β-glucosidase, and N-α-benzoyl-l-argininamide-hydrolyzing activities and (b) explore the relationships between soil microbiological, biochemical, and chemical
properties and wheat yields under semiarid field conditions by principal component analysis. The additions of MSW compost,
SS compost, and thermally dried SS did not affect significantly soil microbial biomass, as compared to mineral fertilization
and no amendment. However, microbial activity increased in organically amended soils, probably due to the stimulating effect
of the added decomposing organic matter. Changes in soil microbiological and biochemical properties showed no significant
relationships with wheat yields, probably because plant growth was primarily water-limited, as typically occurs in semiarid
regions. |
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