Çanakkale Umurbey Ovası Topraklarının Erozyona Duyarlılığının Mevsimsel Değişimi

Abstract

Toprağın erozyona duyarlılığı, yağış veya yüzey akışla toprağın parçalanmaya direncidir. Çanakkale Umurbey Ovası topraklarının erozyona duyarlılığını (K faktörü) ıslak eleme ve Wischmeier ve Smith (1978) abağının eşitliği kullanarak belirlemek için dört mevsimde 17 toprak serisinden yüzey örnekleri alınmıştır.K faktörleri ve agregat stabiliteleri bakımından mevsimler arasındaki farkın karşılaştırılması tekrarlanan ölçümlü deneme düzeninde varyans analizine göre yapılmıştır. Farklı mevsimlerde alınan toprakların agregat stabilitesi değerleri (%2.76 ile %4.35) düşük, K faktörü değerleri ise 0.20 ile 0.30 arasında (fazla aşınabilir topraklar) saptanmıştır. Toprakların agregat stabilitesi değerlerini yükseltmek ve K faktörü değerlerini düşürmek için toprak koruyucu yöntem olarak bitkisel yöntemlere ağırlık verilmeli özellikle organik madde toprağa ilave edilmelidir

Keywords

• Toprağın erozyona duyarlılığı, Agregat stabilitesi, Çanakkale Umurbey ovası

Seasonal Change of Erodibility in the Soils of Çanakkale-Umurbey Plain

Abstract

Soil erodibility is the resistance of soil to detachment by rainfall impact or surface flow force. Surface soil samples were taken from 17 soil series in four seasons to determine the erosion sensitivity of the soils of Çanakkale Umurbey Plain (K–factor) by using wet sieving method and the equations of Wischmeier and Smith (1978) nomograph’ s equation. Differences in K factors and aggregate stabilities by season were compared with repeated measurement variance analysis. Aggregate stabilities of the soil samples taken at different seasons varied between 2.76 – 4.35% (low) and K–factors varied between 0.20 – 0.30 (highly erodible). Vegetative measures and especially organic matter supplementation should be emphasized as a soil conservation method to improve the aggregate stabilities and to reduce K–factor values

Keywords

• Soil erodibility, Aggregate stability, Çanakkale–Umurbey plain

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