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Gaziosmanpaşa Üniversitesi (2015)

Assesment the sustainable soil tillage practices through soil quality evaluation in a semi-arid region

BAYRAM Mustafa

Titre : Assesment the sustainable soil tillage practices through soil quality evaluation in a semi-arid region

Yarı kurak bir bölgede sürdürülebilir toprak işleme yöntemlerinin toprak kalitesinin değerlendirilmesi yoluyla belirlenmesi

Auteur : BAYRAM Mustafa

Université de soutenance : Gaziosmanpaşa Üniversitesi

Grade : Doktora Tezi 2015

Résumé partiel
Evaluation of individual soil parameters makes the determination of soil tillage effects difficult. Monitoring of soil quality provides advantages to determine sustainable soil tillage methods. Soil tillage applications in arid regions might decrease actual and potential productivity function of soils and threat to agricultural sustainability and environmental quality. The objectives of this study were to 1.) determine the effects of four different soil tillage systems on soil quality indicators and 2.) determine the minimum data set required to assess tillage effects on productivity of silage triticale- silage corn rotation using soil functions and indicator scoring. The tillage treatments used were : Conventional soil tillage (moldboard plow+combine soil tillage machine+planting) (CT), Reduced soil tillage (Goble-Disc harrow + planting) (RT-1), Reduced soil tillage (Rototiller + planting) (RT-2), and no till (NT). The study has been conducted on Kizilca and Karadeli series located in Emen plain at Central Anatolia of Turkey. Low organic matter, high pH and boron concentration were the major limiting factors of the region. The field studies have been conducted using the 12 field plots in each soil series established in 2012. Bulk density, aggregate stability, penetration resistance, total organic carbon, sodium adsorption ration, electrical conductivity, pH, phosphorus, potassium, potential mineralizable nitrogen and available water content were used as the soil quality indicators which are sensitive to changes in management. The most appropriate minimum data sets (MDS) were determined by using Principal Component Analyses (PCA). Soil quality assessments were performed using the "Soil Management Assessment Framework (SMAF)" ; and calculated by additive (AD-1), Weighted additive (AD-2) and Function weighted index (AD-3) methods. Bulk density, penetration resistance and aggregate stability were the mostly affected soil physical indicators by tillage practices. Total organic carbon (TOC) was the most affected soil property by the different soil tillage systems and TOC is very important to determine MDS for sustainable soil tillage methods. TOC, bulk density, penetration resistance, pH and electrical conductivity (EC) were included within the MDS of both soil series. pH, EC and SAR values were decreased as compared to the beginning of the filed trails. CT method resulted in decline in soil quality index (SQI) of 0-10 cm depth calculated with AD-1 at Kizilca series, whereas SQI remained constant with NT application.

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Page publiée le 9 janvier 2023