Enzymatic activity of anthropogenic proto-organic soils in soilless farming

Risultato della ricerca: Other

Abstract

In soilless agriculture and horticulture coir is the more used substratum to grow plants because it is widely availableand more environmentally friendly than sphagnum or peat. In Italy, soilless agriculture concerns an area of about1,000 hectares, particularly concentrated in Sicily. The southern coastal belt of this region is the area interested bythe most significant experiences in the application of techniques of soilless cultivation that, recently, has been usedalso for growing table grapes.Starting from the above consideration we suppose that the features of the coconut fiber underlay an evident transformationand that even after few years of table grape cultivation, such organic material undergone to a transformationthat allows for the formation of a proto-organic soil (a proto-Histosol, we supposed). If this is true, we believe that,in this case, to speak about soilless cultivation is for sure misleading for the common people, as we should definethis cultivation “on anthropogenic soils” instead.To fit the aims of this survey we used a big greenhouse devoted to soilless cultivation of table grape in a farm inthe Southern SicilyWe have considered the enzymatic activity that characterized the coconut fiber after 3 cycles ofcultivation of table grapes. We used as a control the coconut fiber that the farmer used to prepare pots for soillesscultivation and coconut fiber of: 6 pots at the end of the first productive cycle 6 pots at the end of the second cycleand 3 pots at the end of the third cycle. On these organic samples we investigated three enzymes, belonging to oxydoreductase(catalase and dehydrogenase) and hydrolase (urease) classes. Statistical analysis of the investigatedenzymes was developed using IBM Statistic SPSS v20 by ANOVA, Tukey test HSD for p 0.01 and MultivariateStatistical Analysis.Results have shown significant differences in enzymes content and quality among coir tests. The use of the cocofiber, as nutritive substratum under fertigation, has positively influenced the growing and proliferation of soil microbesand thus enzymatic activity. In merely 3 productive cycles the stage of decomposition of the organic residueschanged highlighting a substantial evolution of such organic material.
Lingua originaleEnglish
Numero di pagine1
Stato di pubblicazionePublished - 2017

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