تأثير ماء الجفت في كثافة بعض الكائنات الحية الدقيقة لتربة مزروعة بالحمص (Cicer arietimum L.)‎

Abstract EN

A pot experiment was conducted in the greenhouse at Aleppo University, Faculty of Agriculture to study the impact of various concentrations of Olive Mill Wastewater (10, 30, 50, 70, 100% Field Capacity) on the number and density of fungi and bacteria in a soil cultivated with chickpea seeds of (variety Ghab3).

Four types of soil were used: sterilized soil (inoculated, non –inoculated) and non sterilized soil (inoculated, non –inoculated).

Experiment was laid in, Completely Randomized Design.

Significant differences occurred in bacteria and fungi density in the non-sterilized non-inoculated soil treated with O.M.W were observed, basically the third treatment (T3) had the greatest differences at (1%) level of significance compared with (66.6, 65.08%) at control treatment in bacteria and fungi, respectively.

Both Concentrations of O.M.W (70,100%) (T4,T5) inhibited the microbial growth.

Consequently, they were considered the threshold concentration of inhibition comparing with T3, on the contrary and among all treatments the number of both organisms was significantly (P≤0.01) declined at (T1,T2) with differences at (1%) level of significance.

The impact of O.M.W was greater in sterilized non-inoculated soil on microbial density , increasing number of organisms reached (15.33 x 104 cell / 1g and 62.67 x 105 cell / 1g) were noted at (T3) in fungi and bacteria, respectively.

The third concentration(T3) played a stimulating role for the development of both organisms (bacteria and fungi).