Influencing the germination of different crops by liquid biogas digestate

Anaerobic digestion (AD) of solid and liquid organic wastes is vastly increased world-wide. This process has a lot of positive effects on the environment, among others the use of AD’s by-product, the digestate, in the agriculture. Digestate could be a liquid or solid material with high nutrient and organic matter content which is appropriate to, at least partly, substitute for artificial fertilizers because of its favourable effect on the development and increase of plants. Digestate can be used before sowing and in this case, it has effect on the germination of crop sown. Therefore our aim was to study the effect of a liquid digestate on the germination and early development of different plants grown in our region. We examined the modification effect of soil type and application times on the effect of applied digestate and we studied the differences among the tested plant species.

Germination experiment was carried out in Petri dishes (Ø=8.5 cm) filled with 80 g sand and loamy meadow soil substances which were watered to the 60 % of their field water holding capacity. Tested concentrations of digestate were 25%, 50% and 100% (v/v) and tap water was used as control. Treatments were done on the day of sowing, 5 days and 21 days before sowing. Tested plants were soybean (Glycine soja L.), sweet corn (Zea mays convar saccharata), rye (Secale cereale L.), winter wheat (Triticum aestivum L.) and sunflower (Helianthus annuus L.). The number of seeds tested depended on the size of the seed, exactly 10 seeds of soybean, sweet corn, 15 seeds of sunflower and 50 seeds of rye and, winter wheat were used in the Petri dishes. The irrigation of seedlings was done in a case of need when seeds began to show wilting symptoms. The germination rate of tested plants was measured on the 10th day after sowing, according to the Hungarian Standard. For toxicity tests the germination index (GI%) and the relative growth index (GRI) were used to calculate the phytotoxic effects. We modified these indexes by using the dry mass of root and shoot of plants. The roots and shoots were measured on the 10th day after sowing. Treatments were carried out in four replications. The statistical analysis of the measured values was done by one-way ANOVA following with Tukey’s test for all tested plants, respectively with the SPSS 13.0 statistical program. The effect of digestate on the germination of seeds depends on the type of soil, plant species (perhaps variety, but it was not examined), doses of digestate, period of digestate application before sowing. Overall, the most sensitive plants were winter wheat and sunflower in both soil substances. For these plant species, only the smallest digestate dose (25%) not caused inhibition, or the germination of these species could be increased in a small rate. The number of germinated seeds and living plants were increased in the case of non-sensitive plant species. Application of digestate for improving the germination rate of crops plants is more effective on sandy soil substance. To take into account the properties of this soil type, the use of digestate as a plant nutrient is very important not only in the point of the environmental protection but also in the point of the sustainable crop production. Generally, early application of digestate causes the loss of nutrients and water and therefore its positive effects are decreased. On the other hand, the high doses of digestate applied near the sowing results the decrease of germination. On loamy meadow soil substance, the inhibitory effect of digestate application was experienced more often, the tested species seemed to be more sensitive than on sandy soil substance, where the treatments increased the germination in a higher rate, comparing to the controls.



Copyright: © European Compost Network ECN e.V.
Quelle: Orbit 2012 (Juni 2012)
Seiten: 8
Preis inkl. MwSt.: € 8,00
Autor: Marianna Makádi
V. Orosz
Miklós Gulyás
J. Lengyel

Artikel weiterleiten In den Warenkorb legen Artikel kommentieren


Diese Fachartikel könnten Sie auch interessieren:

Post-treatment of Composting Leachate by Photocatalytic Process
© Wasteconsult International (5/2015)
In this study the capability of UV-ZnO photocatalytic process as a post Treatment method for composting leachate was examined at laboratory scale and in batch mode. The effect of some factors such as initial pH, oxidant concentration, light intensity and reaction time on the removal of organic load and color of leachate were investigated. Biological pre-treated leachate samples were collected from the effluent of leachate treatment facility of a composting plant in north of Iran. A Plexiglas column with 110 mm inner diameter and 300 mm height were used to conduct experiments. UVC lamps with different power levels in the range of 8-40W at the centre of the column were used as the source of irradiation. Based on the results of experiments, after 180 minutes of Radiation with 32W UVC lamps in pH 11 and in the presence of 1g.L-1 of slurry ZnO, maximum COD and color removal were achieved to be 57% and 67%, respectively.

Auswirkungen der BioAbfV, der IED-Richtlinie und BVT auf neue und bestehende Bioabfallbehandlungsanlagen
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2013)
Die Entsorgungswirtschaft – einschließlich der Betreiber von Bioabfallbehandlungsanlagen – hat bereits heute ein strenges Regime bei der Zulassung von Abfallbehandlungsanlagen zu beachten. Der überwiegende Teil der Anlagen ist nach dem Bundes-Immissionsschutzgesetz (BlmSchG) genehmigt. Das Kapitel 8 der Vierten Verordnung zur Durchführung des BlmSchG (4. BlmSchV) befasst sich allein mit Anlagen zur Verwertung und Beseitigung von Abfällen und sonstigen Stoffen.

Neubau eines Kompostwerks mit Biogaserzeugung im Bioenergiepark Saerbeck
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2013)
Die Entsorgungsgesellschaft Steinfurt (EGST) wurde vor fast genau 20 Jahren gegründet. Über seine Beteiligungsgesellschaft ist der Kreis Steinfurt heute alleiniger Gesellschafter. Die EGST hat ihren Sitz in Altenberge.

Erweiterung einer Kompostanlage um eine anaerobe Behandlung
© Arbeitsgemeinschaft Stoffspezifische Abfallbehandlung ASA e.V. (9/2012)
Der Landkreis Kassel hat seit über 15 Jahren die Biotonne flächendeckend eingeführt. Durch das Einheits-Gebührensystem ist eine hohe Bioabfallerfassungsrate realisiert worden, denn jedes Grundstück erhält eine 240 l – Biotonne kostenlos zum Restabfallgefäß dazu. Entsprechend hoch ist die spezifische Menge an Bio- und Grünabfällen von über 200 kg/Einwohner und Jahr. Damit gehört der Landkreis Kassel bundesweit zu den Spitzenreitern (Durchschnitt Hessen: 130 kg/E*a). Insgesamt werden bei 237.000 Einwohnern ca. 42.000 t Bioabfälle und 6.000 t Grünabfälle eingesammelt.

Digestate and compost quality - case studies at anaerobic disgestion plants with the BTA Process
© European Compost Network ECN e.V. (6/2012)
The key for the successful anaerobic digestion of biowaste and/or municipal solid waste is an efficient removal of the impurities before the digestion step. This is not only indispensable for the reliability of the process and therefore the plant availability, but furthermore for the quality of the produced digestate or final compost. With the existing developments within the EU, the quality of the digestate / compost has become a focus of attention. Further Authors: P. Bolzano - Biotec Sistemi s.r.l. J. Del’haye - IVVO

Name:

Passwort:

 Angemeldet bleiben

Passwort vergessen?

Der ASK Wissenspool
 
Mit Klick auf die jüngste Ausgabe des Content -Partners zeigt sich das gesamte Angebot des Partners
 

Selbst Partner werden?
 
Dann interessiert Sie sicher das ASK win - win Prinzip:
 
ASK stellt kostenlos die Abwicklungs- und Marketingplattform - die Partner stellen den Content.
 
Umsätze werden im Verhältnis 30 zu 70 (70% für den Content Partner) geteilt.
 

Neu in ASK? Dann gleich registrieren und Vorteile nutzen...