1,721,112 research outputs found
Lo zolfo nella nutrizione vegetale: gli aspetti della ricerca scientifica
No full textLo zolfo svolge nei vegetali importanti funzioni nella nutrizione e cura delle patologie fungine. Riguardo la nutrizione lo zolfo è considerato un nutriente essenziale, il cui fabbisogno è inferiore agli elementi macronutritivi ma superiore ai micronutritivi. L’applicazione di ammendanti organici costituiscono un’importante risorsa nelle strategie della fertilizzazione solforata. Per la valutazione delle capacità fertilizzanti degli ammendanti occorre comprendere le dinamiche di mineralizzazione della frazione organica solforata nel suolo. L’elaborazione di modelli cinetici ha permesso di verificare le ipotesi sui meccanismi implicati nel fenomeno e di stimare con sufficiente grado la biologia del processo di decomposizione
Influenza di tecniche agronomiche alternative e convenzionali sulle caratteristiche chimico-fisiche del suolo
No full text
Sulla presenza del boro nelle Crittogame
No full textA series of Cryptogames, with particular regar to their boron content was examined; the chlorophyll content and the content of other mineral elements, nutrients and toxic, was also determined.
Results have shown that boron content of the leaves of Cryptogames appears as great as that of Phanerogames and that the major quantities are restricted to the spores
Organic matter characteristics, biochemical activity and antioxidant capacity of soil amended with different organic materials.
No full textThe influence of pelleted cow manure (PCM), peat, municipal solid waste compost (MSWC), wet olive husk compost (WOHC) and green waste compost (GWC) on soil biochemical activity, antioxidant capacity (trolox equivalent antioxidant capacity (TEAC)) and the level of soil organic matter was evaluated in a short-term laboratory study. Peat was the most acidifying material, followed by GWC and PCM, reflecting the acidic characteristics of the compounds present in the aqueous and alkaline extracts of the amendments. Organic materials caused a marked increase of total and water-soluble organic carbon, total N, water- and alkali-soluble phenols in soil, with values generally reflecting the amount of organic matter present in the amendments. The breakdown percentage of C added expressed as CO2-C evolution for PCM was considerably the highest (18%) and for WOHC was considerably the lowest. The water-soluble organic carbon present in the amendments and soil total N acted as controllers of the rate of decomposition of organic C in soil. The highest TEAC was in peat soil, with 583.0 mM g−1, followed by PCM soil (450.2 mM g−1), while soils treated with compost had quite similar values (about 230 mM g−1). TEAC was strictly correlated with both alkali- and water-soluble phenols and water-soluble organic carbon. The level of ATP in PCM soil at the 60th day of incubation suggests that the PCM is the most effective amendment for increasing the activity of microbial biomass in soil
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