Naslov
Tillage, farmyard manure and gypsum effects on soil physical properties and yield in organic crop production in Mediterranean Croatia

Autori
Brezinščak, Luka ; Bogunović, Igor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
“CASEE universities as laboratories for new paradigms in life sciences and related disciplines” / Lošťák, Michael - Prag, 2021, 43-43

Skup
CASEE conference 2021

Mjesto i datum
Prag, Češka Republika, 07.06.2021. - 08.06.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
farmyard manure, gypsum, tillage

Sažetak
Mediterranean Croatia has a huge potential for organic agriculture, due to climate, unpolluted soils, and greater economic value of final products. However, soil productivity is often endangered in coastal regions by extensive soil salinity. Increased salt concentration accelerates the soil degradation process (slaking, swelling, dispersion of clay) and decreases soil water permeability and yields. Thus, the adoption of an appropriate agrotechnical system that is affordable and follows principles of organic agriculture for such soils is a basic need for sustainable organic crop production. In this study, in split-plot experimental design, the impact of three selected treatments was followed: control, G6+OM (6 t gypsum + 40 t farmyard manure per hectare) and G6S2 (6 t gypsum + 2 t sulphur per hectare). The second factor consists of two tillage management: disc-harrow - DH and disc- harrow with ripping - DH+RIP. Soil physical properties and crop yields in saline-sodic soils of Raša River Valley, Istria (45°3' N ; 14°2' E) were determined in two seasons from 2015 to 2017. In the season 2015/2016, the crop was spring oat (Avena sativa L.) and in 2016/2017 rye (Secale cereale L.). In the season 2015/16, tillage had a significant effect on water holding capacity at 15-30 cm, by DH+RIP (44.06 %) being greater then DH (43.57 %). Bulk density significantly increase with depth at both tillage treatments (DH+RIP: 1.31 g cm-3 , 0-15 cm ; 1.48 g cm-3 , 15-30 cm ; DH: 1.38 g cm-3 , 0- 15 cm ; 1.52 g cm-3 ). DH+RIP (45.43 % ; 39.09 %) had significantly higher total soil porosity on all depths in addition to DH (41.38 % ; 38.11 %). Soil air- filled capacity was 14 % and 12% higher (p > 0.05) in DH+RIP than in DH treatment at 0-15 cm and 15-30 cm depths, respectively. Tillage show modifications on crop yields. DH+RIP treatments showed 15 % higher (p > 0.05) yields compared to DH treatments. Between amendments treatment, in season 2015/2016 G6+OM treatment record 29 % higher yields of oat, while G6S2 treatment recorded 18 % lower compared to control. In 2016/2017, soil water holding capacity was significantly different between DH+RIP (48.54 % ; 42.68 %) and DH (45.25 % ; 41.58 %) at 0-15 and 15-30 cm depths. At 0-15 cm depth soil water content was higher in DH+RIP (46.25 %) than in DH (42.85 %) (p < 0.05). At both depths, DH+RIP treatment recorded significantly lower compaction and higher total porosity compared to DH. Air- filled capacity was 20 % higher in DH+RIP treatment than in DH treatment. Yields of rye were affected (p < 0.05) by tillage and amendments. G6+OM recorded 25 % higher yield compared to control but didn't differ significantly. Unfortunately, the results cannot provide conclusive answers to finding a sustainable system for the specified region. The experiment should be continued by monitoring additional physical soil properties (aggregate stability, soil structure, and hydraulic properties) in order to find safer conclusions and recommendation for sustainable agro-system at saline-sodic soils.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA