KAYIKÇIOĞLU, Hüseyin Hüsnü Ege Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey , OKUR, Nur Ege Üniversitesi - Ziraat Fakültesi - Toprak Bilimi ve Bitki Besleme Bölümü, Turkey

Seasonal changes of microbial biomass-C, N and P in soils under different plant covers

23084

Soil microbial activity can affect the ability of soil to supply nutrients to plants through soil organic matter turnover. Limited data, however, exist on the magnitude of seasonal changes in soil microbial biomass and mineralizable C, N and P in different agricultural ecosystems to ascertain the practical significance of these fluctuations on crop growth and nutrient conservation. It was determined seasonal changes of microbial biomass-C, N and P, and amounts of mineralizable N and total P in soils under different plan covers and taken different dates. Soil samples were taken from a pasture, an olive plantation, a wheat field and a rotated wheat-maize-legume field in October, January, April and July. In these samples; microbial biomass-C, N and P, soil respiration, mineralizable nitrogen forms and available P were determined. According to the results; the highest and the lowest microbial biomass were determined in pasture and wheat field, respectively. It was found higher microbial biomass in top soil layer (0-15 cm depth) than bottom soil layer (15-30 cm depth). In addition, the highest microbial biomass was observed in soils taken in April and the lowest microbial biomass in soils taken in January.

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Microbial biomass , C , N and P , mineralizable nitrogen forms and seasonal changes

The Journal Of Ege University Faculty Of Agriculture

65