Influence of salinity on microbial respiration and enzyme activity of soils


Okur N. , CENGEL M., GOCMEZ S.

International Symposium on Techniques to Control Salination for Horticultural Productivity, Antalya, Türkiye, 7 - 10 Kasım 2000, ss.189-194 identifier identifier

Özet

Detrimental effects of salts on microbial activity may be due to the toxicity of specific ions, elevation of osmotic pressure or the increase in alkalinity which may restrict the availability of water or influence cellular physiology and metabolic pathways. In this study, the effects of irrigation with saline water (S-0=0.65, S-1=2.0, S-2=3.5, S-3=5.0 and S-4=6.5 dS m(-1)) and fertilization with potassium (K-0, K-1=100 and K-2=200 g tree(-1)) on the microbiological characteristics of an alluvial soil were studied. The experiment was established in 1994 to determine the effects of salinity on yield and quality of Satsuma mandarin budded on Poncirus trifoliata and to test the interaction of fertilizer K with salinity. Soil samples were taken on September 1999 and analyzed for their soil respiration and the activities of phosphatase and beta-Glucosidase.