FORESTIST

W ATER REPELLEN CY IN MACCHİE SOILS AND ITS RELATION TO PLANT SPECİES, SOBL PRO PERTIES AND F İR E

1.

İÜ Orman Fakültesi, Havza Yönetimi Anabilim Dalı 34473 Bahçeköy/İstanbul

FORESTIST 1987; 37: 69-83
Read: 667 Downloads: 450 Published: 26 February 2020

Being tlıe dominant plant cover in tlıe Mediterranean clim atic region, the macclıie has a great potential to produce Iıydrobhobic subtances AVİıich create w ater repellency problem in soils. The macchie soils developed on different parent m aterials, under four macchie species showed a tvater repellency with varying degrees from moderate to extreme. The soils derived from granite parent m aterial iıı which the sand contents are higlı, have a great scnsitivity to occurrence of the w ater repellency tlıan the soils derived from metamorplıic schist parent material with lovver sand contents. When the sand fraction contents of the soils reach to 80 percent or more, the occurence of the extrem ely •vvater repellency begins. The clay contents of the soils lıave also affect the soil Avettability, especially in sandy soils. Infiltration trials in field conditions slıowed that, infiltration rates 5 - 8 3 times higher in normal \vettable soils tlıan in \vater repellent soils under same plant cover. 

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EISSN 2602-4039